Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2009-01-20
2011-12-13
Weiner, Laura (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S231100, C429S232000, C429S321000, C429S322000, C429S323000, C429S307000, C429S327000, C429S329000, C429S341000, C429S245000, C429S094000, C429S129000, C429S249000, C429S254000, C429S178000, C429S176000
Reexamination Certificate
active
08076029
ABSTRACT:
A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture which contains 1,3-dioxolane and isosorbide dimethyl ether. The solvent mixture may comprise 1,3-dioxolane, 1,2-dimethoxyethane and additive isosorbide dimethyl ether. The isosorbide dimethyl ether comprises typically between about 2 and 15 percent by weight of the solvent mixture and improves cell service life and performance. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
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Issaev Nikolai N.
Navok Eric
Sliger Michael
Yelm Kenneth E.
The Gillette Company
Vitenberg Vladimir
Weiner Laura
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