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US 4,465,747 AGranted
Alkali metal or alkaline earth metal compound additive for manganese dioxide-containing nonaqueous cells
AssigneeUnion Carbide Corporation
InventorWilliam P. Evans
Life of this patent
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Abstract
A nonaqueous cell employing a manganese dioxide-containing solid cathode having a minor amount of an alkali metal or an alkaline earth metal additive such as Li.sub.2 SiO.sub.3, Li.sub.2 B.sub.4 O.sub.7, Li.sub.2 MoO.sub.4, Li.sub.3 PO.sub.4 or Li.sub.2 WO.sub.4 to suppress the build-up of internal impedance in the cell during storage and discharge that may occur with electrolyte degradation.
Claims10
A nonaqueous cell comprising an active metal anode, a nonaqueous electrolyte solution comprising a solute at least one organic solvent, dissolved in a solid cathode comprising manganese dioxide, a binder and a conductive agent;
- the improvement wherein the cathode contains a minor amount of an additive selected from the group consisting of the borates, silicates, molybdates, phosphates, aluminates, niobates, tantalates, titanates, vanadates, zirconates, manganates (Mn +4), cobaltates, and tungstates of alkali metals or alkaline earth metals wherein the alkali metal is selected from the group consisting of lithium, potassium, rubidium and cesium and wherein the alkaline earth metal is selected from the group consisting of magnesium, calcium, strontium, and barium.
Dependencies are inferred from the claim text.