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. 04, 2003
Filed:
Dec. 22, 2000
Terrell Neils Andersen, Edmond, OK (US);
Samuel Faust Burkhardt, Edmond, OK (US);
Wilmont Frederick Howard, Jr., Edmond, OK (US);
Richard F. Wohletz, Las Vegas, NV (US);
Vahid Kazerooni, Yukon, OK (US);
Mohammad Reza Moumenzadeh, Oklahoma City, OK (US);
Amy Wren Unsell, Choctaw, OK (US);
Kerr-McGee Chemical, LLC, Oklahoma City, OK (US);
Abstract
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.