CATHODE MATERIAL FOR SECONDARY MANGANESE DIOXIDE AQUEOUS BATTERIES

A cathode material for a secondary aqueous manganese dioxide battery, comprising a compressed mixture of manganese dioxide particles, an electrical conductive additive, and a binder. The manganese dioxide particles are modified such that: 20-100% of an average bulk composition of the manganese dioxi...

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Bibliographische Detailangaben
Hauptverfasser:	VIDARSSON, Hilmar, CHAMOUN, Mylad, SKÅRMAN, Björn
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A cathode material for a secondary aqueous manganese dioxide battery, comprising a compressed mixture of manganese dioxide particles, an electrical conductive additive, and a binder. The manganese dioxide particles are modified such that: 20-100% of an average bulk composition of the manganese dioxide particles has a beta manganese dioxide structure, the rest being other manganese dioxide polymorph structures, Mn3O4 or combinations thereof, and the carbon content of the manganese dioxide particles is 0.001-0.01 wt%. In a method for producing such cathode material, manganese dioxide particles are coated with a coating solution comprising an organic carbon source, the coating solution having an organic carbon concentration of 0.01 to 7.5 % by weight of the manganese dioxide particles. Thereafter the coated particles are dried and heated.