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Document Type and Number:
Japanese Patent JP3093227
Kind Code:
PURPOSE:To improve cycle characteristic and increase capacity by treating manganese oxide with an acidic solution containing NH4 ion to form a manganese compound, and using a compound obtained by baking this compound together with lithium salt as a positive electrode. CONSTITUTION:Baking is conducted to make tetravalent manganese contained in electrolytic manganese dioxide EMD into trivalent one. As an acidic solution containing NH4 ion, (NH4)2SO4 is added to a sulfuric acid solution followed by heating, and the EMD after baking is added thereto and stirred. After stirring, the resulting solution is washed with pure water and dried. LiOH.H2 is mixed as a lithium salt with this sample to obtain a positive electrode active material consisting of a compound of manganese, lithium and oxygen, A nonaqueous electrolytic secondary battery is formed by use of this positive electrode active material. Hence, charge and discharge cycle characteristic and capacity can be improved.

Kohei Yamamoto
Yoshihisa Hino
Yoshiro Harada
Mitsuhiro Nakamura
Shutetsu Nagura
Application Number:
Publication Date:
October 03, 2000
Filing Date:
January 30, 1990
Export Citation:
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Fuji Electric Chemical Co., Ltd.
International Classes:
H01M10/05; H01M4/505; H01M10/0566; (IPC1-7): H01M4/58; H01M4/02; H01M10/40
Domestic Patent References:
Attorney, Agent or Firm:
Kensuke Isshiki (1 person outside)