Duracell Inc.

Ionic Materials, Inc.

G Stephen Kelsey

Michael A Zimmerman

Alexei B Gavrilov

Keith Smith

Viet H Vu

Bhupendra Kanchanial Patel

Douglas J Woodnorth

John D Sillesky

Purush Chalilpoyil

Alex Kaplan

Jesse R Rea

Milton Kallianidis

Gerald H Newman

Philp D Trainer

Douglas C Magnuson

John S Miller

George Cintra

Alfred M Kasianowicz

A metal-air battery and a component air cathode including a solid ionically conductive polymer material.

Alkaline metal-air battery cathode

An alkaline cell is disclosed having a cathode comprising manganese dioxide wherein the cathode is a semisolid during discharge of the cell. The cell has an anode comprising zinc and an electrolyte comprising potassium hydroxide. The semisolid cathode comprising manganese dioxide may be in the form of a putty or paste. The semisolid cathode reduces cathode polarization effects and results in increased manganese dioxide utilization (Amp-hr/g), particularly at high current drain, between about 0.5 and 2 Amp. The porosity of the cathode is between about 45% and 70%, and the volume ratio of electrolyte solution in the cathode to the solids in the cathode is at a value between about 0.7 and 2.3.

Alkaline cell with semisolid cathode

The present invention is an improved alkaline cell wherein the capacity of each of the anode and cathode is at least 0.48 and more preferably to at least 0.5 ampere-hour per cm.sup.3 of internal cell volume. This is achieved by employing zinc densities of at least 1.4 grams of zinc per cm.sup.3 of anode volume and MnO.sub.2 densities of at least 2.7 grams of MnO.sub.2 per cm.sup.3 of cathode volume.

Alkaline cell

A completely solid state high temperature storage cell comprised of a solid rechargeable cathode such as TiS.sub.2, a solid electrolyte which remains solid at the high temperature operating conditions of the cell and which exhibits high ionic conductivity at such elevated temperatures such as an electrolyte comprised of lithium iodide, and a solid lithium or other alkali metal alloy anode (such as a lithium-silicon alloy) with 5-50% by weight of said anode being comprised of said solid electrolyte.

High temperature solid state storage cell

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Nashua, NH, United States of America

G Stephen Kelsey