Kerr-mcgee Chemical, LLC

Other

Tronox LLC

Wilmont Frederick Howard, Jr

Terrell N Andersen

Stephen Wilfred Sheargold

Vahid Kazerooni

Mohammad Reza Moumenzadeh

Richard F Wohletz

Samuel Faust Burkhardt

Amy Wren Unsell

Robert L Peterson

Phillip M Story

Anthony Michael Thurston

Monte Sean Jordan

Felix Mbanga Towa

Joe Lane Bledsoe

Terrell Neils Andersen

Intercalation cathode materials especially suited for use in high-voltage, high-energy lithium rechargeable batteries, having the formulae Li[Li()/MMn()/Ni()O, where 0&#x3c;x&#x3c;0.5, 0&#x3c;y&#x2266;0.25, x&#x3e;y, and M is one or more divalent cations from Ca, Cu, Mg, and Zn. A process for making such materials is also provided.

High voltage laminar cathode materials for lithium rechargeable batteries, and process for making the same

The present invention provides improved cathode material comprised of electrolytic manganese dioxide having high discharge capacity at high discharge rates and methods of producing such electrolytic manganese dioxide by electrolysis in an electrolytic cell. The methods are basically comprised of maintaining a heated high purity aqueous electrolyte solution comprising sulfuric acid and manganese sulfate in the electrolytic cell, the manganese sulfate being present in the solution whereby it contains in the range of from about 5 to about 50 grams of manganese per liter of solution. An electric current is applied to the electrodes of the electrolytic cell whereby the anodic electrode current density is in the range of from about 2.5 to about 6 amperes per square foot.

High discharge capacity electrolytic manganese dioxide and methods of producing the same

Improved stabilized spinel battery cathode material and methods of treating particles of spinel battery cathode material to produce a protective coating of battery-inactive lithium metal oxide on the particles are provided. The methods basically comprise mixing the spinel particles with a particulate reactant selected from a lithium salt, a lithium metal oxide or a mixture of a lithium salt and a metal oxide and then heating the resultant particulate mixture for a time and temperature to react the particulate reactant with the spinel particles whereby a protective coating of lithium metal oxide is formed on the spinel particles and the lithium content of the spinel adjacent to the coating is increased a limited amount.

Stabilized spinel battery cathode material and methods

The present invention provides improved cathode material comprised of electrolytic manganese dioxide having high discharge capacity at high discharge rates and methods of producing such electrolytic manganese dioxide by electrolysis in an electrolytic cell. The methods are basically comprised of maintaining a heated high purity aqueous electrolyte solution comprising specific amounts of sulfuric acid and manganese sulfate in the electrolytic cell and maintaining the amounts of the sulfuric acid and manganese ion in the solution at a ratio of sulfuric acid to manganese ion greater than 2. An electric current is applied to the electrodes of the electrolytic cell whereby the anodic electrode current density is in the range of from about 2.5 to about 6 amperes per square foot and the high discharge capacity EMD produced is deposited on the anodic electrode.

Intercalation compositions having spinel structures with crystallites of metal oxides (M,O,) dispersed throughout the structure are provided having the general formula Li,M,Mn,O,. Methods of producing the intercalation compositions and rechargeable lithium batteries containing the compositions are also provided.

Cathode intercalation compositions, production methods and rechargeable lithium batteries containing the same

Method of producing high discharge capacity electrolytic manganese dioxide

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Edmond, OK, United States of America

Wilmont Frederick Howard, Jr