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Rechargeable battery cathode from P2- phase sodium cobalt dioxide
| Details |
Inventors: Shacklette, Lawrence W.; Townsend, Linda B.; Jow, Taiguang R.;
Assignee: Allied-Signal (Morris Township, Morris County, NJ)
Primary Examiner: Kalafut; Stephen J.
Assistant Examiner:
Attorney, Agent or Firm: Stewart, II; R. C., Fchs; G. H., Webster; D. L.
This invention relates to a novel cathode for use in batteries, and to batteries containing the cathode, which cathode comprises cobalt dioxide in the P2 phase. |
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DETAILED DESCRIPTION What is claimed is: 1.
An improved battery of the type which includes a cathode means, an anode means and an electrolyte, the improvement comprising a cathode means comprising Na.
sub.
x CoO.
sub.
2 in the P2 phase characterized in that the change in x during a charge/discharge cycle, .
DELTA.
x, is greater than about 0.
37.
2.
A battery according to claim 1 .
DELTA.
x during the charge/discharge cycle is equal to or greater than about 0.
40.
3.
A battery according to claim 2 wherein .
DELTA.
x during the charge/discharge cycle is equal to or greater than about 0.
42.
4.
A battery according to claim 3 wherein .
DELTA.
x during the charge/discharge cycle is equal to or greater than about 0.
42.
5.
A battery according to claim 1 wherein said cathode comprises particulate sodium cobalt dioxide dispersed in a polymeric binder.
6.
A battery according to claim 4 wherein said binder is selected from the group consisting of halopolymers and elastomeric materials.
7.
A battery according to claim 5 wherein said binder is a halopolymer.
8.
A battery according to claim 6 wherein said binder is an elastomeric material.
9.
A battery according to claim 8 wherein said elastomeric material is selected from the group consisting of hydrocarbon elastomers, polyethers, aliphatic polyesters, and copolymers of ethylenically unsaturated ethers, esters, and ketones.
10.
A battery according to claim 9 wherein said elastomeric material is selected from the group consisting of hydrocarbon elastomers and polyether elastomers.
11.
A battery according to claim 10 wherein said elastomeric material is selected from the group consisting of hydrocarbon elastomers.
12.
A battery according to claim 11 wherein said hydrocarbon elastomers include cross-linkable moieties.
13.
A battery according to claim 12 wherein said moieties are double bonds in the polymeric backbone or pendant double bonds.
14.
A battery according to claim 13 wherein said hydrocarbon elastomers are selected from the group consisting of polymers or copolymers of diene monomers
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Fuel Cells 
