Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1995-05-22
1996-07-02
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
423605, H01M 450, C01G 4502
Patent
active
055320848
ABSTRACT:
The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting product takes the form of gamma manganese dioxide particles characterized by filament-like protrusions of ramsdellite manganese dioxide jutting out from the surface of the particles. The manganese dioxide particles having such features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield high density manganese dioxide. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD). The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.
REFERENCES:
patent: 4277360 (1981-07-01), Mellors et al.
patent: 4959282 (1990-09-01), Dahn et al.
T. Nishimura and Y. Umetsu, Shizen Sozai Gakkai-shi, vol. 107 (Jun. 1991) No. 11, pp. 805-810.
Japanese patent publication (Kokai) Application Sho 53-111429, Sep. 1978.
Bowden William L.
Lin Lifun
Wang Enoch I.
Cornell Ronald S.
Duracell Inc.
Feltovic Robert J.
Josephs Barry D.
Skapars Anthony
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