The Gillette Company

Duracell Inc.

Alexander A Leef

Stuart Michael Davis

Shuming Zeng

Gary A Miller

Tae-Won Lee

Terry Copeland

Peter R Moses

Christopher P Haines

Sandrine Colson

Hana Strunc

A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.

Battery cathode

A cathode that includes manganese dioxide and a titanium oxy salt, preferably titanium oxy sulfate, is disclosed.

The invention relates to alkaline cells containing manganese dioxide cathode active material. A substance selected from the group of compounds CaWO.sub.4, MgTiO.sub.3, BaTiO.sub.3, CaTiO.sub.3, ZnMn.sub.2 O.sub.4, and Bi.sub.12 TiO.sub.20 is added to the cathode of conventional alkaline cells typically having an anode comprising zinc and cathode comprising manganese dioxide and an alkaline electrolyte. The additive increases the service life of the cell.

Additives for alkaline electrochemical cells having manganese dioxide

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Waltham, MA, United States of America

Alexander A Leef