The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2006
Filed:
Oct. 08, 2003
Terrill B. Atwater, North Plainfield, NJ (US);
Alvin J. Salkind, Princeton, NJ (US);
Arek Suszko, Lakewood, NJ (US);
Terrill B. Atwater, North Plainfield, NJ (US);
Alvin J. Salkind, Princeton, NJ (US);
Arek Suszko, Lakewood, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
The present invention provides a manganese bismuth mixed metal oxide cathode material through a solid-state reaction between manganese dioxide, and either bismuth or a bismuth compound in a compound having the general formula MnO(BiO), which affords charge transfer catalytic behavior that allows the cathode to be fully reversible at suppressed charge potentials and increased discharge potentials. The MnO(BiO)cathode material may be incorporated into an electrochemical cell with either a lithium metal or lithium ion anode and an organic electrolyte. The present invention provides a compound with the general formula MnO(BiO), where subscript x is between 0.05 and 0.25, subscript y is about 2 and the overcharge protection is not needed as the subscript z approaches 0.0. In the preferred embodiment, a cathode material where subscript x is between 0.05 and 0.135 with the formula MnO(BiO)provides the much-needed full reversibility, high voltage stability and reduced charge transfer impedance. A manganese bismuth mixed metal oxide cathode for an lithium electrochemical system, a lithium electrochemical system and a rechargeable lithium battery employing the same compound with the general formula MnO(BiO)and methods for making manganese bismuth mixed metal oxide cathode material for lithium electrochemical devices having the general formula MnO(BiO)are also provided.