This invention relates to a nonaqueous cell comprising a lithium metallic foil anode and a cathode coating comprising iron disulfide as the active material wherein the coating is applied to at least one surface of a metallic substrate that functions as the cathode current collector. In particular, the cell of the within invention has improved performance on high rate discharge and is achieved, surprisingly, with an anode underbalance. The cell of the within invention has an anode to cathode input that is less than or equal to 1.0. We have discovered, unexpectedly, that the energy density for the cell both volumetrically and gravimetrically can be improved by approximately 20 to 25% while only increasing the volume of the cathode coating solids by approximately 10% through a unique and novel cathode coating formulation used in conjunction with a lithium foil anode.

PTO Wrapper PDF
Dossier Espace Google
Patent
   RE41886
Priority
Jun 05 2002
Filed
Feb 16 2007
Issued
Oct 26 2010
Expiry
Jun 05 2022
Inventors
Marple, Ja…
Assg.orig
Eveready B…
Assg.curr
Energizer …
Entity
Large
Referenced by
3
References
166
Maint.:
EXPIRED<2yrs
EXAMPLE
15. An electrochemical cell comprising a nonaqueous electrolyte, an anode and a cathode assembly, the cathode assembly comprising a metallic cathode current collector having two major surfaces and a cathode coating disposed on at least one of the two major surfaces, the cathode coating comprising iron disulfide, fumed silica, acetylene black and synthetic graphite, and the anode comprising metallic lithium.
1. An electrochemical cell comprising a nonaqueous electrolyte, an anode and a cathode assembly, the electrolyte comprising a solvent, the cathode assembly comprising a metallic cathode current collector having two major surfaces and a cathode coating disposed on at least one of the two major surfaces, the coating comprising iron disulfide, and the anode comprising metallic lithium, wherein the interfacial anode to cathode input ratio is less than or equal to 1.0.
0. 33. An electrochemical cell comprising:
a nonaqueous electrolyte comprising at least one solvent;
a jellyroll electrode assembly having an anode and a cathode assembly wound together;
wherein the cathode assembly comprises a metallic cathode current collector with two major surfaces and a cathode coating comprising iron disulfide disposed on at least one of said two major surfaces; and
wherein the anode comprises metallic lithium; and
wherein an interfacial anode to cathode input ratio for the jellyroll electrode assembly is less than 1.0.
2. The cell of claim 1, wherein the metallic lithium is alloyed with aluminum.
3. The cell of claim 2, wherein the metallic lithium comprises less than 1.0 percent by weight of aluminum.
4. The cell of claim 3, wherein the metallic lithium comprises between 0.1 and 0.9 percent by weight aluminum.
5. The cell of claim 4, wherein the metallic lithium comprises 0.5 percent by weight of aluminum.
6. The cell of claim 1, wherein the cathode coating further comprises a void volume of less than 43 percent.
7. The cell of claim 6, wherein the void volume is from 36 percent to 42 percent.
8. The cell of claim 7, wherein the cathode coating further comprises synthetic graphite.
9. The cell of claim 8, wherein the synthetic graphite is highly crystalline synthetic graphite.
10. The cell of claim 9, wherein the highly crystalline synthetic graphite has a mean particle size of 3.0 to 11.0 microns, a BET surface area of 3.0 to 11.0 m2/gm and an n-dibutyl phthalate oil absorption ratio of 160 to 200 percent.
11. The cell of claim 7, wherein the cathode coating further comprises acetylene black.
12. The cell of claim 7, wherein the cathode coating further comprises a micronized polytetrafluoroethylene powder.
13. The cell of claim 12, wherein the cathode coating further comprises a styrene-ethylene-butylene-styrene block copolymer.
14. The cell of claim 13, wherein the cathode coating further comprises fumed silica.
16. The cell of claim 15, wherein the synthetic graphite and the acetylene black together comprise between 7.0 and 11.0 volume percent of the total solids content of the cathode coating.
17. The cell of claim 16, wherein the synthetic graphite and the acetylene black together comprise between 10.0 and 10.5 volume percent of the total solids content of the cathode coating.
18. The cell of claim 17, wherein the solids volume percent of the synthetic graphite is at least twice the solids volume percent of the acetylene black.
19. The cell of claim 15, wherein the synthetic graphite has a mean particle size of 3.0 to 11.0 microns, a BET surface area of 3.0 to 11.0 m2/gm and an n-dibutyl phthalate oil absorption ratio of 160 to 200 percent.
20. The cell of claim 15, wherein the cathode coating further comprises a micronized polytetrafluoroethylene powder.
21. The cell of claim 20, wherein the cathode coating further comprises a styrene-ethylene-butylene-styrene block copolymer.
22. The cell of claim 15, wherein the metallic lithium is alloyed with aluminum.
23. The cell of claim 18, wherein the cathode coating further comprises micronized polytetrafluoroethylene, and a styrene-ethylene-butylene-styrene block copolymer, and the synthetic graphite comprises highly crystalline synthetic graphite.
24. The cell of claim 23, wherein the cathode components are present in the following solids weight percents: iron disulfide 90.0 to 94.0 percent; acetylene black 1.0 to 3.0 percent; synthetic graphite 3.0 to 6.0 percent; polytetrafluoroethylene 0.2 to 0.6 percent; silica 0.2 to 0.6 percent; SEBS block copolymer 1.5 to 3.0 percent.
0. 25. The cell of claim 2, wherein the cathode coating has a void volume of less than 43 percent.
0. 26. The cell of claim 1, wherein the anode to cathode input ratio is less than or equal to 0.95.
0. 27. The cell of claim 1, wherein the cathode coating further comprises a conductive carbon material.
0. 28. The cell of claim 27, wherein the conductive carbon material is synthetic graphite.
0. 29. The cell of claim 28, wherein the synthetic graphite is highly crystalline synthetic graphite.
0. 30. The cell of claim 27, wherein the conductive carbon material is acetylene black.
0. 31. The cell of claim 1, wherein the cathode coating further comprises a rheological modifier.
0. 32. The cell of claim 31, wherein the rheological modifier comprises a silanol group.
0. 34. The electrochemical cell according to claim 33, wherein the anode to cathode input ratio is less than or equal to 0.95.
0. 35. The electrochemical cell according to claim 33, wherein the metallic lithium is alloyed with aluminum.
0. 36. The electrochemical cell according to claim 35, wherein the anode to cathode input ratio is less than or equal to 0.95.
0. 37. The electrochemical cell according to claim 35, wherein the anode comprises between about 0.1 and 2.0 percent by weight of aluminum.
0. 38. The electrochemical cell according to claim 33, wherein the jellyroll electrode assembly also has an outer wrap comprising polypropylene.
0. 39. The electrochemical cell according to claim 33, wherein the cathode coating has a void volume of less than 43 percent.
0. 40. The electrochemical cell according to claim 33, wherein the cathode coating further comprises a conductive carbon material.
0. 41. The cell of claim 40, wherein the conductive carbon material is highly crystalline synthetic graphite.
0. 42. The cell of claim 40, wherein the conductive carbon material is acetylene black.
0. 43. The cell of claim 33, wherein the cathode coating further comprises a rheological modifier.
0. 44. The cell of claim 43, wherein the rheological modifier comprises a silanol group.
0. 45. The cell of claim 33, wherein the jellyroll electrode assembly has a diameter of at least about 0.525 inches.
0. 46. The cell of claim 33, wherein the jellyroll electrode assembly further comprises an anode tab.
0. 47. The cell of claim 46, wherein the anode tab is bent over the jellyroll electrode assembly.
0. 48. The cell of claim 1, wherein the interfacial anode to cathode input ratio=anode capacity per linear inch/cathode capacity per linear inch; wherein the anode capacity per linear inch=(foil thickness)×(interfacial electrode width)×(density of lithium foil at 20° C.)×(lithium energy density, 3861.7 mAh/g); and wherein the cathode capacity per linear inch=(final cathode coating thickness)×(interfacial electrode width)×(cathode dry mix density)×(final cathode packing percentage)×(dry weight percent FeS2)×(percent purity FeS2)×(FeS2 energy density, 893.58 mAh/g).
0. 49. The cell according to claim 48, wherein the metallic lithium is alloyed with aluminum.
0. 50. The cell according to claim 48, wherein the metallic lithium comprises less than 1.0 percent by weight of aluminum.
0. 51. The cell according to claim 50, wherein the metallic lithium comprises between 0.1 and 2.0 percent by weight of aluminum.
0. 52. The cell according to claim 51, wherein the metallic lithium comprises about 0.5 percent by weight of aluminum.
0. 53. The cell according to claim 48, wherein the cathode coating further comprises a void volume of less than 43 percent.
0. 54. The cell according to claim 56, wherein the void volume is from 36 percent to 42 percent.
0. 55. The cell according to claim 48, wherein the cathode coating further comprises synthetic graphite.
0. 56. The cell according to claim 55, wherein the synthetic graphite has a mean particle size of 3.0 to 11.0 Pm, a BET surface area of 3.0 to 11.0 m2/g, and a DBP of 160 to 200 percent.
0. 57. The cell according to claim 48, wherein the cathode coating further comprises acetylene black.
0. 58. The cell according to claim 48, wherein the cathode coating further comprises a micronized polytetrafluoroethylene powder.
0. 59. The cell according to claim 48, wherein the cathode coating further comprises a styrene-ethylene-butylenestyrene block copolymer.
0. 60. The cell according to claim 48, wherein the cathode coating further comprises fumed silica.
0. 61. The cell according to claim 48, wherein the cathode coating further comprises a total of between 7.0 and 11.0 percent synthetic graphite and acetylene black, based on the total solids content of the cathode coating.
0. 62. The cell according to claim 48, wherein the synthetic graphite and the acetylene black together comprise between 10.0 and 10.5 volume percent of the total solids content of the cathode coating.
0. 63. The cell according to claim 48, wherein the solids volume percent of the synthetic graphite is at least twice the solids volume percent of the acetylene black.
0. 64. The cell according to claim 48, wherein the electrolyte comprises an organic solvent.
0. 65. The cell according to claim 48, wherein the cathode assembly and the anode are wound together into a jellyroll electrode assembly.


Cathode Capacity Per Linear Inch:
(final cathode coating thickness)×(interfacial electrode width)×1 inch×(cathode dry mix density)×(final cathode packing percentage)×(dry weight percent FeS2)×(percent purity FeS2)×(FeS2 energy density, 893.58 mAh/gm)
Anode/cathode input ratio-anode capacity per linear inch/cathode capacity per linear inch

“Interfacial electrode width” as used herein is the linear dimension that shares an interfacial area between the cathode and the anode. An example is illustrated in FIG. 1, where the dimension labeled “A” is the interfacial electrode width. “Final cathode coating thickness” refers to the coating thickness after any calendering operation or other densification processing of the cathode. “Final cathode packing percentage” refers to the solid volume percentage after any calendering operation or other densification processing and is equivalent to 100 percent less the void volume percentage after any calendering operation or other densification processing of the cathode. The “cathode dry mix density” refers to the additive density of the solid components of the cathode coating.

A preferred polymer binder for the cathode coating of the cell of the within invention is a styrene-ethylene/butylene-styrene (SEBS) block copolymer. One such suitable block copolymer is available commercially from Kraton Polymers of Houston, Tex. as Kraton G1651. The preferred solvent for use with such a binder is stabilized 1,1,2-trichloroethylene. One of skill in the art will appreciate that other combinations of binders and/or solvents may be utilized in the cathode coating of the cell of the within invention without departing from the scope of the within invention

EXAMPLE

An electrochemical cell comprising lithium as the active anode material and pyrite as the active cathode material is constructed as follows. A continuous strip of lithium metal foil 0.006 inches thick by 1.535 inches wide and alloyed at 0.5 weight percent with aluminum is provided. An aluminum cathode current collector continuous strip 0.001 inches thick by 1.72 inches wide is provided. The aluminum cathode collector strip is full hard standard alloy 1145-H19 aluminum and both surfaces are flame cleansed to remove oils and improve adhesion of the coating to the substrate surface.

A cathode coating slurry is prepared using the following solids:

Material Weight percent (dry) cm3/100 gms
FeS2 92.0 19.087
Acetylene black 1.4 0.733
Highly crystalline 4.0 1.777
synthetic graphite
Formed silica 0.3 0.136
Micronized PTFE 0.3 0.136
Kraton 2.0 2.198
24.067 cm3/100 gms
4.155 gm/cm3

Cathode capacity per linear inch:
(0.0063 in.)(1.535 in.)(1.0 in.)(16.387 cm3/in3) (4.1555 gm/cm3)(0.64 solids packing) (0.92) (0.95)(893.58 mAh/gm )=329 mAh/linear inch
Anode capacity per linear inch:
(0.006 in.)(1.535 in.)(1.0 in.)(16.387 cm3/in3)(0.534 gm/cm3)(3861.7 mAh/gm)=311 mAh/linear inch
The resulting anode to cathode input ratio is 311/329=0.95.

The anode, cathode and a suitable separator are wound together from continuous webs into an electrode assembly with an overwrap on the exterior of the jelly roll and disposed within a can or other suitable container. A plastic insulating disc is punched and placed into each can initially. Automatic winders initiate the jellyroll with separator, followed by the cathode. The anode is introduced into the winder after the cathode and the jellyroll is formed to predetermined electrode lengths based on the location of the anode tab. The winder feed stock is separated from the web and an overwrap film is introduced into the winder at the trail end of the jellyroll and wound over the jellyroll until a predetermined jellyroll diameter is obtained. The wrap is cut and heat sealed, the cathode collector is crimped and the jellyroll is inserted into the container. The can is swaged to reduce its diameter prior to electrolyte filling.

Conventional cell assembly and closing methods are utilized to complete the final cell, followed by a predischarge regimen. The anode tab is a 0.002 inch thick nickel plated steel foil tab that is pressure bonded to the lithium foil web at predetermined intervals corresponding to the predetermined prewind anode length of 12.00 inches and is bent over the completed jellyroll prior to insertion of the jellyroll into the can. The separator is a 25 micron thick polypropylene material available from Celgard Corporation as Celgard 2400. The can is nickel plated steel with an outer diameter of 0.548 inches and the jellyroll finished diameter is 0.525 inches. The outer wrap is a polypropylene film. The electrolyte is 1.6 grams of 63.05 weight percent 1,3 dioxolane, 27.63 weight percent 1,2 dimethoxyethane, 0.18 weight percent 3,5 dimethylisoxazole, and 9.14 weight percent lithium iodide.

INVENTORS:

Marple, Jack W.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
8859146, Mar 28 2011 Energizer Brands, LLC High-capacity and high-reliability lithium iron disulfide cell designs and methods for making the same
9099741, Jul 01 2011 Energizer Brands, LLC Particle size distribution variations in iron disulfide cathodes
9325018, Mar 28 2011 Energizer Brands, LLC Lithium-iron disulfide cell design
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
3679538,
3907589,
3933520, Apr 03 1975 The United States of America as represented by the United States Energy Method of preparing electrodes with porous current collector structures and solid reactants for secondary electrochemical cells
3951685, Feb 25 1975 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Nonaqueous cell utilizing a 3Me2Ox-based electrolyte
3996069, Jun 30 1975 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Nonaqueous cell utilizing a 3Me20x-based electrolyte
4048402, Dec 27 1976 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Non-aqueous cell having a cathode of lead monoxide-coated lead dioxide particles
4049882, Feb 11 1976 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Battery assembly
4049892, Dec 27 1976 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Non-aqueous cell having as cathode a mixture of lead dioxide and lead monoxide and/or lead particles
4129686, Nov 16 1977 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Pronged anode collector for internally shorting galvanic cells
4143217, Oct 03 1977 Great Lakes Carbon Corporation Process for manufacture of positive electrode for lithium/metal sulfide secondary cell
4163829, Nov 14 1977 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Metallic reducing additives for solid cathodes for use in nonaqueous cells
4208473, Jun 11 1979 General Motors Corporation Bipolar battery
4230549, May 31 1977 RAI Research Corporation Separator membranes for electrochemical cells
4238554, Sep 04 1979 DURACELL INC , A CORP OF DEL Abuse resistant active metal anode/fluid cathode depolarized cells
4298665, Jun 27 1980 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Cathode comprising the reaction product of Bi2 O3 and WO3
4301220, Jun 24 1980 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Nonaqueous cell with cathode comprising the reaction product of bismuth trioxide and molybdenum trioxide
4302520, Jun 25 1980 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Cathode comprising the reaction product of bismuth, sulfur and lead or iron
4327166, Sep 29 1980 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Nonaqueous cell having a MNO2 /poly-carbon fluoride cathode
4379815, Jun 29 1981 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Cell having mixed solid cathode materials for controlling cell expansion on discharge
4386019, Jul 29 1981 University of Chicago Method of making electrodes for electrochemical cell
4390604, Jun 29 1981 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Complex metal sulfide cathodes for nonaqueous cells
4399204, Jun 30 1981 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Solid cathode comprising a lead fluoride/tin fluoride compound
4444857, Jun 17 1981 Societe Anonyme dite: GIPELEC Electrochemical cell including a solid electrolyte made from a cation conductive vitreous compound
4446212, Jul 29 1981 University of Chicago Electrochemical cell
4450214, Jun 14 1982 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Lithium halide additives for nonaqueous cell systems
4465747, Jun 29 1983 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Alkali metal or alkaline earth metal compound additive for manganese dioxide-containing nonaqueous cells
4478921, Sep 28 1983 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Manganese carbonate additive for manganese dioxide-containing nonaqueous cells
4482615, Sep 30 1982 SAFT AMERICA, INC Lithium anode comprising copper strip in contact with lithium body and lithium-sulfur dioxide battery utilizing same
4489144, Mar 28 1983 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Isoxazole derivative additive in organic electrolytes of nonaqueous cells employing solid cathodes
4499161, Apr 25 1983 EIC Laboratories, Inc. Electrochemical cell using dimethoxymethane and/or trimethoxymethane as solvent for electrolyte
4524115, Nov 19 1982 RAYOVAC CORPORATION, 601 RAYOVAC DR , MADISON, WI 53711, A WI CORP Voltage stabilizing agents for cells
4536456, Jun 29 1983 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Tellurium-containing cathodes for nonaqueous cells
4618548, Mar 18 1985 Combustion Engineering, Inc. Electrolyte additive
4624902, Jun 27 1983 VOLTAIX INCORPORATED Coatings for electrochemical electrodes and methods of making the same
4626335, Aug 26 1985 GOLDMAN SACHS CREDIT PARTNERS L P Lithium alloy anode for thermal cells
4654281, Mar 24 1986 Minnesota Mining and Manufacturing Company Composite cathodic electrode
4672010, Jul 18 1986 Eveready Battery Company Terminal pin-collector plate assembly for hermetically sealed cells
4675256, Jun 24 1986 SAFT AMERICA, INC Thermal battery comprising iron pyrite depolarizer and ferric sulfate additive
4675257, Nov 29 1982 SAFT AMERICA, INC Iron-lithium anode for thermal battery
4683181, Apr 24 1984 SOCIETE NATIONALE ELF AQUITAINE & HYDRO-QUEBEC Electrochemical generator with composite electrode
4687716, Jul 31 1985 Sony Corporation Organic electrolyte cell
4707422, Jun 27 1983 Voltaix, Inc.; VOLTAIX, INC Composite coating for electrochemical electrode and method
4735875, Mar 24 1986 Minnesota Mining and Manufacturing Company Cathodic electrode
4761487, Jun 10 1986 UNITED STATES OF AMERICA, AS REPRESENTED BY THE DEPARTMENT OF ENERGY, THE Method for improving voltage regulation of batteries, particularly Li/FeS2 thermal batteries
4764437, May 29 1986 University of Chicago Lithium disulfide battery
4770960, Apr 30 1986 Sony Corporation Organic electrolyte cell
4794057, Jul 17 1987 The Gillette Company Separator for electrochemical cells
4804595, Jan 15 1988 ULTRALIFE BATTERIES, INC , A CORP OF DE Non-aqueous electrolytes for lithium batteries
4808497, Dec 28 1983 EVEREADY BATTERY COMPANY, INC , A CORP OF DE Organic electrolyte for nonaqueous cells
4851306, Jul 18 1988 ARCH DEVELOPMENT CORPORATION, A CORP OF ILLINOIS Molten salt electrolyte battery cell with overcharge tolerance
4855195, Jul 11 1988 Eveready Battery Company, Inc. Electrochemical cell with internal circuit interrupter
4861573, Jun 27 1983 Voltaix, Inc. Composite coating for electrochemical electrode and method
4913988, Jun 11 1987 Eveready Battery Company, Inc. Li2 CO3 -Ca(OH)2 additive for cathodes in nonaqueous cells
4935316, Jul 25 1989 University of Chicago Overdischarge protection in high-temperature cells and batteries
4952330, May 25 1989 Eveready Battery Company, Inc. Nonaqueous electrolyte
4963446, Apr 05 1989 Eveready Battery Co., Inc. Inwardly indented edge electrode assembly
4971868, Nov 03 1986 Eveready Battery Company, Inc. Hermetically sealed nonaqueous cell with positive terminal pin and perchlorate electrolyte
4975341, Apr 03 1990 Eveready Battery Company, Inc Electrochemical cell with circuit disconnect device
4981672, Jun 27 1983 VOLTAIX, LLC Composite coating for electrochemical electrode and method
5006429, Aug 24 1989 The United States of America as represented by the Secretary of the Navy Externally heated thermal battery
5051183, Sep 20 1990 Tonen Corporation Microporous polyolefin membrane and method of producing same
5075990, Sep 11 1986 BBA NONWOVENS SIMPSONVILLE, INC Battery separator fabric method for manufacturing
5114811, Feb 05 1990 GREATBATCH, LTD NEW YORK CORPORATION High energy density non-aqueous electrolyte lithium cell operational over a wide temperature range
5116701, Feb 22 1991 Eveready Battery Company, Inc. Microporous separator composed of microspheres secured to an electrode strip
5128220, Dec 11 1990 Eveready Battery Company, Inc. Method for fiber coating tacky active electrode strips
5143805, Mar 24 1986 Minnesota Mining and Manufacturing Company Cathodic electrode
5158722, May 12 1990 VARTA MICROBATTERY GMBH Process for the production of a positive electrode in ribbon form for primary and secondary cells
5162172, Dec 14 1990 Arch Development Corp Bipolar battery
5173235, Sep 10 1988 Ube Industries, Ltd. Method of producing microporous film
5206456, Aug 24 1989 The United States of America as represented by the Secretary of the Navy Ordinance thermal battery
5219683, Aug 02 1990 Eveready Battery Company, Inc. Diol diesters and alkoxyalkylesters as solvents for nonaqueous battery electrolytes
5229227, Jul 23 1992 Eveready Battery Company Inc. Low flammability nonaqueous electrolytes
5262255, Jan 30 1991 MATSUSHITA ELECTRIC INDUSTRIAL CO , LTD Negative electrode for non-aqueous electrolyte secondary battery
5290414, May 15 1992 Eveready Battery Company, Inc. Separator/electrolyte combination for a nonaqueous cell
5397661, Jan 12 1994 The University of Chicago Battery cell feedthrough apparatus
5401593, Jan 16 1991 The Secretary of State for Defence in Her Britannic Majesty's Government High temperature secondary batteries
5418084, Nov 23 1992 Eveready Battery Company, Inc. Electrochemical cell having a safety vent closure
5432030, Dec 02 1993 Eveready Battery Company, Inc.; Eveready Battery Company, Inc Li/FeS2 cell employing a solvent mixture of diox, DME and 3ME20X with a lithium-based solute
5458997, Aug 19 1994 Medtronic, Inc.; Medtronic, Inc Rebalancing of lithium/silver vandium oxide (Li/SVO) cells for improved performance
5514491, Dec 02 1993 Eveready Battery Company, Inc. Nonaqueous cell having a lithium iodide-ether electrolyte
5529858, Oct 24 1994 SAFT AMERICA, INC Hermetically sealed thermocompression feedthrough and peripheral seal for high temperature lithium based battery applications
5536600, Sep 23 1994 ENERGY, DEPARTMENT OF, UNITED STATES Li-alloy electrode for Li-alloy/metal sulfide cells
5543249, Mar 01 1995 GREATBATCH, LTD NEW YORK CORPORATION Aqueous blended electrode material for use in electrochemical cells and method of manufacture
5569553, Mar 08 1995 GREATBATCH, LTD NEW YORK CORPORATION Battery design for achieving end-of-life indication during electrical discharge
5604051, Oct 17 1994 ENSER CORPORATION, THE, A CORP OF ALABAMA High temperature rechargeable cell design
5667916, May 10 1996 GREATBATCH, LTD NEW YORK CORPORATION Mixed cathode formulation for achieving end-of-life indication
5691083, Jun 07 1995 Energizer Brands, LLC Potassium ion additives for voltage control and performance improvement in nonaqueous cells
5695892, Aug 20 1996 GREATBATCH, LTD NEW YORK CORPORATION Preparation of silver vanadium oxide using nitric acid with oxide starting materials
5716728, Nov 04 1996 GREATBATCH, LTD NEW YORK CORPORATION Alkali metal electrochemical cell with improved energy density
5736275, Apr 30 1996 CHIAGO, UNIVERSITY OF High power bipolar battery/cells with enhanced overcharge tolerance
5830603, Sep 03 1993 Sumitomo Electric Industries, Ltd. Separator film for a storage battery
5856043, Jun 12 1996 Nikkiso Company Ltd. Non-aqueous electrolyte secondary battery
5895730, Sep 14 1994 Secretary of State for Defense, The Defence Evaluation and Research High temperature battery
5932375, Feb 18 1997 Alcoa Inc Form charging aluminum-lithium battery cells
5935724, Apr 04 1997 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having multiplate electrodes with differing discharge rate regions
5935728, Apr 04 1997 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having multiplate and jellyroll electrodes with differing discharge rate regions
6068950, Nov 19 1997 GREATBATCH, LTD NEW YORK CORPORATION Organic phosphate additives for nonaqueous electrolyte in alkali metal electrochemical cells
6083644, Nov 29 1996 SEIKO INSTRUMENTS, INC Non-aqueous electrolyte secondary battery
6087809, Jan 16 1998 GREATBATCH, LTD NEW YORK CORPORATION Implantable medical device powered by double cells
6096447, Nov 05 1997 GREATBATCH, LTD NEW YORK CORPORATION Phosphonate additives for nonaqueous electrolyte in alkali metal electrochemical cells
6117591, May 27 1998 GREATBATCH, LTD NEW YORK CORPORATION Hydrogen fluoride additive for nonaqueous electrolyte in alkali metal electrochemical cells
6136477, Oct 22 1998 GREATBATCH, LTD NEW YORK CORPORATION Nitrate additives for nonaqueous electrolyte rechargeable cells
6153338, May 13 1998 GREATBATCH, LTD NEW YORK CORPORATION Nonaqueous organic electrolytes for low temperature discharge of rechargeable electrochemical cells
6165638, Apr 04 1997 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having multiplate and jellyroll electrodes with differing discharge rate regions
6171729, Jan 02 1998 GREATBATCH, LTD NEW YORK CORPORATION Control of swelling in alkali metal electrochemical cells
6174629, Jan 25 1999 GREATBATCH, LTD NEW YORK CORPORATION Dicarbonate additives for nonaqueous electrolyte rechargeable cells
6200701, Jan 25 1999 GREATBATCH, LTD NEW YORK CORPORATION Phosphonate additives for nonaqueous electrolyte in rechargeable cells
6203942, Oct 22 1998 GREATBATCH, LTD NEW YORK CORPORATION Phosphate additives for nonaqueous electrolyte rechargeable electrochemical cells
6203947, Apr 08 1998 Ramot University Authority for Applied Research and Industrial Development LTD Long cycle-life alkali metal battery
6218054, Aug 13 1991 Energizer Brands, LLC Dioxolane and dimethoxyethane electrolyte solvent system
6245464, Sep 21 1998 GREATBATCH, LTD NEW YORK CORPORATION Hermetically sealed lithium-ion secondary electrochemical cell
6251308, Mar 19 1999 QUANTUM COMPOSITES INC Highly conductive molding compounds and fuel cell bipolar plates comprising these compounds
6258473, Apr 04 1997 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having multiplate electrodes with differing discharge rate regions
6265103, Sep 26 1996 Steinbeis IBL GmbH Enclosure assembly for dry cells
6265106, Jan 20 1998 GREATBATCH, LTD NEW YORK CORPORATION Alkali metal electrochemical cell activated with a nonaqueous electrolyte having a sulfate additive
6274269, Nov 19 1997 GREATBATCH, LTD NEW YORK CORPORATION Method for reducing voltage delay in alkali metal electrochemical cells activated with a nonaqueous electrolyte having a phosphate additive
6306544, Feb 25 1999 GREATBATCH, LTD NEW YORK CORPORATION Cobalt-based alloys as positive electrode current collectors in nonaqueous electrochemical cells
6335114, Nov 16 1998 Denso Corporation Laminate-type battery and process for its manufacture
6346349, Feb 11 1999 Alcatel Anode invention for lithium/transition metal fluoride molten salt cells and batteries
6391488, Jul 09 1999 MATSUSHITA ELECTRIC INDUSTRIAL CO , LTD Non-aqueous electrolyte cell
6392385, Dec 01 1999 Valence Technology, Inc Battery operation for extended cycle life
6399246, May 05 2000 Energizer Brands, LLC Latex binder for non-aqueous battery electrodes
6451483, Sep 27 1999 GREATBATCH, LTD NEW YORK CORPORATION Enhanced capacity Li/CFx electrochemical cell
6455202, Feb 25 1999 Alcatel Positive electrode for a lithium rechargeable electro-chemical cell having an aluminum current collector
6495285, Jan 25 1999 GREATBATCH, LTD NEW YORK CORPORATION Phosphonate additives for nonaqueous electrolyte in rechargeable electrochemical cells
6511772, Jan 17 2001 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having an electrode with a phosphate additive in the electrode active mixture
6541158, Feb 25 1999 GREATBATCH, LTD NEW YORK CORPORATION Cobalt-based alloys as positive electrode current collectors in nonaqueous electrochemical cells
6551747, Apr 27 2000 GREATBATCH, LTD NEW YORK CORPORATION Sandwich cathode design for alkali metal electrochemical cell with high discharge rate capability
6586135, Mar 21 2001 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having an electrode with a dicarbonate additive in the electrode active mixture
6593029, Mar 15 2001 GREATBATCH, LTD NEW YORK CORPORATION Manufacturing process for improved discharge of lithium-containing electrochemical cells
6605385, Mar 22 2001 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having an electrode with a carbonate additive in the electrode active mixture
6616715, Mar 23 1998 NGK Insulators, Ltd. Batteries having desired working volume ratios of positive and negative materials
6627337, Feb 16 2000 GREATBATCH, LTD NEW YORK CORPORATION Conversion of low rate energy into high rate energy by parallel discharging
6627353, Nov 08 2000 LITHIUM POWER TECHNOLOGIES, INC Disposable lithium batteries
6645671, Dec 11 1998 Fujitsu Limited Lithium secondary battery, anode for lithium secondary battery, and method for manufacturing the anode
6673493, Nov 17 2000 GREATBATCH, LTD NEW YORK CORPORATION Double current collector cathode design using the same active material in varying formulations for alkali metal or ion electrochemical cells
6677077, Apr 04 1997 GREATBATCH, LTD NEW YORK CORPORATION Electrochemical cell having multiplate electrodes with differing discharge rate regions
6692865, Nov 17 2000 GREATBATCH, LTD NEW YORK CORPORATION Double current collector cathode design using mixtures of two active materials for alkali metal or ion electrochemical cells
6692871, Nov 17 2000 GREATBATCH, LTD NEW YORK CORPORATION Double current collector cathode design for alkali metal electrochemical cells having short circuit safety characteristics
6730136, Oct 01 2001 Energizer Brands, LLC Direct addition of beta-aminoenones in organic electrolytes of nonaqueous cells employing solid cathodes
6730437, Jun 19 2001 GREATBATCH, LTD NEW YORK CORPORATION Anode for nonaqueous secondary electrochemical cells
6759164, Nov 29 2000 GREATBATCH, LTD NEW YORK CORPORATION Use of heat-treated electrodes containing a polyamic acid-PVDF binder mixture
6780542, Sep 13 2001 GREATBATCH, LTD NEW YORK CORPORATION Lithium oxyhalide cell with improved safety and voltage delay characteristics
6811926, Nov 07 2001 ZINCFIVE POWER, INC Formulation of zinc negative electrode for rechargeable cells having an alkaline electrolyte
6849360, Jun 05 2002 Energizer Brands, LLC Nonaqueous electrochemical cell with improved energy density
6884544, Jan 18 2000 Lithium Werks Technology BV Lithium-based active materials and preparation thereof
6936379, Nov 09 2001 GREATBATCH, LTD NEW YORK CORPORATION Method for electrode design for implantable device applications that require the elective replacement indicator (ERI)
6991874, May 04 1998 BASF Aktiengesellschaft Compositions suitable for electrochemical cells
20030124427,
20030228518,
20040009401,
20040018430,
20050084756,
20050112462,
EP872908,
EP930664,
EP529802,
EP567506,
GB2160705,
JP55154067,
JP56079859,
JP5679859,
JP60160566,
WO67338,
WO135475,
WO330279,
ASSIGNMENT RECORDS    Assignment records on the USPTO
/////////////
Executed onAssignorAssigneeConveyanceFrameReelDoc
Feb 16 2007Eveready Battery Company, Inc.(assignment on the face of the patent)
Jun 01 2015Eveready Battery Company, IncEnergizer Brands, LLCASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0360190814 pdf
Jun 30 2015Energizer Brands, LLCJPMORGAN CHASE BANK, N A , AS AGENTSECURITY AGREEMENT0361060392 pdf
Jun 01 2016Eveready Battery CompanyEnergizer Brands, LLCCORRECTIVE ASSIGNMENT TO CORRECT THE APPLICATION NUMBER 29 499,135 PREVIOUSLY RECORDED AT REEL: 036019 FRAME: 814 ASSIGNOR S HEREBY CONFIRMS THE ASSIGNMENT 0400540660 pdf
Jan 02 2019ASSOCIATED PRODUCTS, LLCJPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Jan 02 2019ENERGIZER HOLDINGS, INC JPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Jan 02 2019JPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTEnergizer Brands, LLCTERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS0488880300 pdf
Jan 02 2019ENERGIZER MANUFACTURING, INC JPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Jan 02 2019AMERICAN COVERS, LLCJPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Jan 02 2019Energizer Brands, LLCJPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Jan 02 2019CALIFORNIA SCENTS, LLCJPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0480290246 pdf
Dec 22 2020Energizer Brands, LLCJPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0548750651 pdf
Dec 22 2020ENERGIZER AUTO, INC JPMORGAN CHASE BANK, N A , AS ADMINISTRATIVE AGENTPATENT SECURITY AGREEMENT0548750651 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
Date Maintenance Fee Events
Jul 02 2014M1552: Payment of Maintenance Fee, 8th Year, Large Entity.


Date Maintenance Schedule
Oct 26 20134 years fee payment window open
Apr 26 20146 months grace period start (w surcharge)
Oct 26 2014patent expiry (for year 4)
Oct 26 20162 years to revive unintentionally abandoned end. (for year 4)
Oct 26 20178 years fee payment window open
Apr 26 20186 months grace period start (w surcharge)
Oct 26 2018patent expiry (for year 8)
Oct 26 20202 years to revive unintentionally abandoned end. (for year 8)
Oct 26 202112 years fee payment window open
Apr 26 20226 months grace period start (w surcharge)
Oct 26 2022patent expiry (for year 12)
Oct 26 20242 years to revive unintentionally abandoned end. (for year 12)