POSITIVE ELECTRODE ACTIVE MATERIAL FOR ORGANIC ELECTROLYTE SECONDARY BATTERY, MANUFACTURE THEREOF, AND ORGANIC ELECTROLYTE SECONDARY BATTERY

Japanese Patent JP3363007

B2

PROBLEM TO BE SOLVED: To improve the discharging capacity and cycle characteristic of an organic electrolyte secondary battery by using lithium manganate whose composition and BET specific surface area are specified as a positive electrode active material.
SOLUTION: In an organic electrolyte secondary battery, lithium manganate having a formula; LixMn2O4 (1.02≤x≤1.13); and 0.5-2m2 BET specific surface area is used as a positive electrode active material. The positive electrode active material, preferably, does not contain fine particles with 1μm or smaller particle size. Further, the content of carbon is preferably about 0.005-0.03wt.%. The positive electrode active material is produced by mixing a lithium compound having about 8μm or smaller median particle size and a manganese compound having 0.5-2.0m2 BET specific surface area in 0.51-0.565 mole ratio (Li/Mn) of contained Li ion and Mn ion and firing the mixture at temperature T (°C) defined as -772x+1506≤T≤-769x+1720 wherein x satisfies the equation; x/2=Li/Mn.

Tatsuji Numata
Tabuchi
Yuichi Kumeuchi
Atsushi Ochi
Würich von Sacken
Quimie Zon

JP30795795A

January 07, 2003

November 27, 1995

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NEC
Mori Energy (1990) Limited

H01M10/05; C01B31/02; C01G45/12; H01M4/505; (IPC1-7): H01M4/58; C01G45/12; H01M4/02; H01M10/40

JP986933A
JP869790A

Nobuyuki Kaneda (2 others)

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