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US 5,474,858 AGranted
Method for preventing gas formation in electro-chemical cells
AssigneeMedtronic, Inc.
InventorDonald R. Merritt
Life of this patent
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Abstract
A non-aqueous electrochemical cell comprising an active metal anode, an organic electrolyte and a cathode comprising a minor amount of a desiccant which is insoluble in the organic electrolyte and non-reactive during cell discharge. The resulting cell has been found to be resistant to internal gas generation. Such a desiccant is particularly useful in lithium/manganese dioxide cells.
Claims7
A hermetically sealed non-aqueous cell comprising a hermetically sealed case and within the hermetically sealed case:
- (a) an active metal anode;
- (b) an organic electrolyte;
- and
- (c) a cathode comprising a minor amount of a desiccant which is insoluble in the organic electrolyte and non-reactive during cell discharge and storage, said desiccant selected from the group consisting of silica, alumina, phosphoric anhydride, calcium sulfate, and magnesium sulfate.
1 more element
Dependencies are inferred from the claim text.