Patent ID: 7195843

Claim:
An electrochemical element or cell, characterized in that it contains an anode, a separator, and a cathode composed of manganese dioxide, in that this cathode incorporates at least one additive selected from the group consisting of compounds of zirconium, titanium oxide with rutile structure, yttrium oxide, cerium oxide, zeolites, aluminosilicates and tungsten oxides selected from the group consisting of barium tungstenate (BaWO 4 ), sodium tungstenate (Na 2 WO 4 ), strontium tungstenate (SrWO 4 ) and manganese (II) tungstenate (MnWO 4 ), in a proportion or range between one ten thousandth (0.0001) and ten (10) percent by weight of the cathode mass.