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

1. Field of the Invention 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...

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Main Authors Andersen, Terrell Neils, Burkhardt, Samuel Faust, Howard, Jr., Wilmont Frederick, Wohletz, Richard F, Kazerooni, Vahid, Moumenzadeh, Mohammad Reza, Unsell, Amy Wren
Format Patent
LanguageEnglish
Published 28.10.2003
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Summary:1. Field of the Invention 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.