| 摘要 |
Disclosed is a process for treating manganese dioxide containing ion- exchangeable cations by replacing the ion-exchangeable cations present in th e manganese dioxide with lithium by a process comprising first replacing ion- exchangeable cations present in the manganese dioxide with hydrogen. This readily is accomplished by slurrying the manganese dioxide in an aqueous aci d solution. The resulting acidic manganese dioxide then is neutralized with a basic solution of a lithium containing compound, such as lithium hydroxide. This neutralization step serves to accomplish replacement of the previously introduced hydrogen, by ion-exchange, with lithium. The manganese dioxide th en is washed with water, dried, and heat-treated at an elevated temperature, in conventional manner, to convert the gamma manganese dioxide to a mixture of the gamma and beta forms, which then is used as the active cathodic componen t in an electrochemical cell. |
