The Gillette Company

Duracell Inc.

Duracell U.S. Operations, Inc.

Christopher P Haines

Stuart Michael Davis

Alison Fiona Stephens

Peter R Moses

Javit A Drake

Michael John Moloney

James Joseph Cervera

Shuming Zeng

Valerie Jean Bradford

Alexander A Leef

Javit Ahmed Drake

Adrien Loic Serout

Bailu Lu

An alkaline cell comprising a housing having a bottom end and a top end, and an electrode assembly disposed within the housing. The electrode assembly comprises a single first electrode and a single second electrode, a separator therebetween, and an electrolyte. The first electrode comprises a hollow outer body and at least one inner body positioned inside the outer body, the outer body and the at least one inner body being joined together inside the housing to form a single substantially homogeneous structure having an essentially uniform electrode properties. The second electrode comprises an intermediate body at least partially disposed between the outer body and the at least one inner body and electrically isolated from the outer body and the at least one inner body.

Alkaline cell having increased interfacial area

A primary alkaline battery includes a cathode having manganese dioxide and carbon particles, an anode, a separator and an alkaline electrolyte. The carbon particles include expanded graphite particles and non-expanded graphite particles. The expanded graphite particles have a kerosene absorption greater than about 2.7 milliliters per gram.

Battery

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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Westford, MA, United States of America

Christopher P Haines