The Gillette Company

3m Innovative Properties Company

Ou Mao

Cahit Eylem

Stuart Michael Davis

Larry J Krause

Jonathan Boulton

Robert L Turner

Paul Albert Christian

Donald J McClure

Nikolay Krastev Iltchev

Jeffery R Dahn

Mary M Buckett

William L Bowden

Jeffrey R Dahn

Ignacio Chi

George M Cintra

Leslie J Pinnell

Klaus Brandt

Rimma A Sirotina

Shuming Zeng

Brian D Fredericksen

Dominique Larcher

Ian Courtney

Brian McGovern

A battery includes a separator with a trapping layer that traps dissolved metal ions.

Battery separator

A method of making a cathode for a lithium primary battery includes lithiated manganese dioxide and a carbon fluoride. The cathode can provide high capacity and voltage with low gassing.

Method of making cathode

The cathode of an alkaline battery can include an electrically conductive additive to increase the cathode efficiency. The additive can include a barium salt and an electrically conductive material. The electrically conductive material can be coated on a surface of the barium salt. The electrically conductive material can be an electrically conductive metal oxide.

Cathode material for battery

Batteries are disclosed. In some embodiments, a battery has a cathode that includes CuMOX, where M is a metal, X includes one or more halides and/or nitrate, x+y is from about 6.8 to about 7.2, and z and t are selected so that the copper in CuMOXhas a formal oxidation state of +2 or greater.

Battery cathode

Batteries and methods of making batteries are disclosed. In some embodiments, a battery includes a housing, a positive electrode comprising a copper material in the housing, a negative electrode in the housing, a separator between the positive electrode and the negative electrode, and an electrolytic solution comprising soluble aluminum in the housing. A method of making a battery can include providing a positive electrode comprising a copper material into a housing, adding a material comprising aluminum to an electrolytic solution, and adding the electrolytic solution into the housing.

Battery

An electrode composition that includes an electrode material consisting essentially of at least one electrochemically inactive elemental metal and at least one electrochemically active elemental metal in the form of an amorphous mixture at ambient temperature. The mixture remains amorphous when the electrode composition is incorporated into a lithium battery and cycled through at least one full charge-discharge cycle at ambient temperature.

Amorphous electrode compositions

The invention provides an improved method for preparing homogeneous intermixtures of particulate manganese dioxide and conductive carbon for use in cathodes for electrochemical cells, in particular alkaline primary cells. Homogeneous intermixtures can be prepared by mechanically activating an essentially dry admixture of particulate electrolytic manganese dioxide and a natural graphite, an expanded graphite or combinations thereof with inert, rigid milling media by the agitation process of the invention. Improved cell discharge performance at both low and high rates of discharge can be achieved for extremely low levels of highly expanded graphite, typically between about 1 and 5 wt %.

Battery cathode and method of manufacture therefor

An electrode composition that includes (a) an electrochemically active metal element which, prior to cycling, is in the form of an intermetallic compound or an elemental metal and (b) a non-electrochemically active metal element. The electrode compositions have high initial capacities that are retained even after repeated cycling. The electrode compositions also exhibit high coulombic efficiencies.

Electrode compositions with high coulombic efficiencies

The invention relates to an improved method for preparing a lithiated manganese dioxide having a stabilized &ggr;-MnO -type crystal structure whereby an essentially dry mixture of manganese dioxide and a lithium salt is subjected to a mechanical activation process in the presence of milling media. The mechanical activation process serves to promote partial ion-exchange of protons present in the manganese dioxide crystal lattice and on the surface of the manganese dioxide particles by lithium cations. The formed lithium ion-exchanged intermediate product is heat-treated to form a lithiated manganese dioxide product having a &ggr;-MnO -type crystal structure that can be advantageously included in the cathode of a lithium primary electrochemical cell.

Mechanochemical synthesis of lithiated manganese dioxide

An electrode for a lithium battery that includes (a) an electrochemically active metal element which, prior to cycling, is in the form of an intermetallic compound or an elemental metal and (b) a non-electrochemically active metal element. The electrode have high initial capacities that are retained even after repeated cycling. The electrode also exhibit high coulombic efficiencies.

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Walpole, MA, United States of America

Ou Mao