Process for producing manganese dioxide

Details Process for producing manganese dioxide Process for producing manganese dioxide

1993-11-16

1995-02-21

Bell, Mark L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423 50, 429224, C01G 4502

Patent

active

053913655

ABSTRACT:
The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield manganese dioxide of varying density and surface area. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD) or onto the surface of other particles. The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.

REFERENCES:
patent: 2956860 (1960-10-01), Welsh
patent: 4277360 (1981-07-01), Mellors
patent: 4959282 (1990-09-01), Dahn et al.
patent: 5069988 (1991-12-01), Tomantschger et al.

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