초록 ▼

Method for the reactive dehydration of manganese dioxide. Dehydration is achieved by contact with a fluid desiccant (dehydrating agent) which reacts with water bound to manganese dioxide. Preferably, a gaseous product or a low boiling point liquid which easily produces vapors is formed. The manganes

Method for the reactive dehydration of manganese dioxide. Dehydration is achieved by contact with a fluid desiccant (dehydrating agent) which reacts with water bound to manganese dioxide. Preferably, a gaseous product or a low boiling point liquid which easily produces vapors is formed. The manganese dioxide is then removed from the fluid desiccant and any adhering dessicant fluid and volatile reaction products are removed from the manganese dioxide under vacuum. Especially preferred for use as the dehydrating agent is thionyl chloride. The present invention is particularly suitable for dehydrating manganese dioxide to be used as electrodes in lithium batteries.

대표청구항 ▼

A method for preparing a water-free lithium-manganese dioxide battery comprising: (a) assembling the battery comprising (A) lithium anode, (B) a cathode comprising carbon and manganese dioxide, and (C) a cell container; (b) adding to said cell container a fluid containing a dehydrating agent which r

A method for preparing a water-free lithium-manganese dioxide battery comprising: (a) assembling the battery comprising (A) lithium anode, (B) a cathode comprising carbon and manganese dioxide, and (C) a cell container; (b) adding to said cell container a fluid containing a dehydrating agent which reacts with water bound to the manganese dioxide to form a reaction product that is extractable from the manganese dioxide; (c) removing said fluid from said cell container; (d) hermetically sealing and connecting said container to a vacuum source; (e) establishing a vacuum within said compartment to pull off any remaining amount of said fluid and any volatile reaction product from said manganese dioxide; (f) releasing the vacuum; and (g) adding anhydrous electrolyte and heremetically sealing the cell.