The Gillette Company

Duracell U.S. Operations, Inc.

James Joseph Cervera

Michael Pozin

William L Bowden

Nikolai Nikolaevich Issaev

Shuming Zeng

Joseph E Sunstrom

Christopher P Haines

Kirakodu S Nanjundaswamy

Jennifer Anne Nelson

David Lloyd Anglin

Fan Zhang

Alexander Boris Shelekhin

Rimma A Sirotina

Klaus Brandt

Hyoun Sook Choe

Robert Yoppolo

Yichun Wang

Richard Edward Durkot

Oleg Podoprigora

Gary A Miller

Terry Lee Hamilton

Daniel Allen

Robert A Yoppolo

Richard E Durkot

Robert Martin Smith

Daniel William Gibbons

An alkaline electrochemical cell having an anode including electrochemically active anode material, a cathode including electrochemically active cathode material, a separator between the anode and the cathode, and an electrolyte. The electrolyte includes a hydroxide dissolved in water. The separator in combination with the electrolyte has an initial area-specific resistance between about 100 mOhm-cmand about 220 mOhm-cm.

Alkaline electrochemical cells with separator and electrolyte combination

A primary battery includes a cathode having an acid-treated manganese dioxide, an anode, a separator between the cathode and the anode, and an alkaline electrolyte.

Acid-treated manganese dioxide and methods of making thereof

And end cap assembly and venting system therein for closing and sealing the open end of a cell housing. The end cap assembly comprises a sealing disk underlying an end cap, and a metal support disk between the end cap and the sealing disk. The metal support disk has a plurality of primary vent apertures and a plurality of secondary vent apertures through its surface. The primary vent apertures are spaced apart along a path located at a greater distance from the central longitudinal axis of the metal support disk than the secondary vent apertures. The insulating sealing disk may have a thinned portion therein forming an rupturable membrane circumventing the central hub of the sealing disk. The insulating sealing disk may have protrusions emanating from its top surface to deflect the membrane during rupture. The venting system releases internal gases rapidly from the cell in the event of an abusive or short circuit discharge.

End cap assembly and vent for high power cells

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

A battery, a primary alkaline battery, has a cathode including manganese dioxide, carbon, and a binder. The manganese dioxide is selected to have a high power coefficient to provide the battery capable of high current discharge.

Battery comprising manganese dioxide having a high power coefficient

A method of making a cathode includes determining a sample of manganese dioxide having a power coefficient greater than about 3.4, and incorporating the sample of manganese dioxide into the cathode. The cathode can be incorporated into a battery, e.g., a cylindrical primary alkaline battery.

Method of selecting manganese dioxide for use in a cathode

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Sandy Hook, CT, United States of America

James Joseph Cervera