ELECTRODE AND LITHIUM SECONDARY BATTERY, AND VALUATION METHOD OF SUBSTITUTED LITHIUM MANGANATE AND LITHIUM SECONDARY BATTERY

Japanese Patent JP2001319654

A

To provide a lithium secondary battery, in which a capacity degradation after repeating a charge/discharge can be prevented.

A positive electrode of the lithium secondary battery is structured by using a material selected from the materials where a part of a manganese in a lithium manganate is substituted by another element, and in the material, a value of an electron density of a total overlap in the manganese-oxygen bonding becomes larger than in the case in which no substitution of element occurs. The substituting element is selected from among the group consisting of Sc, Fe, Co, Ni, Cu, and Zn, whose ionic radii approach the radius of manganese. The characteristic of such substituted lithium manganate itself or the characteristic of the lithium secondary battery, in which the substituted lithium manganate is used as a positive material, is evaluated by the electron density value of the total overlap in the manganese-oxygen bonding.

JP3393145	[Title of Invention] Lithium Ion Secondary Battery
JPH1092406	SEALED CELL
JP4096754	Non-aqueous electrolyte Positive electrode active material for secondary batteries

HASEGAWA AKIRA
YOSHIZAWA KAZUNARI
YAMABE TOKIO

JP2000348778A

November 16, 2001

November 15, 2000

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INST FUNDAMENTAL CHEMISTRY
SUMITOMO CHEMICAL CO

H01M10/05; H01M4/505; H01M4/525; H01M10/0525; H01M10/0566; (IPC1-7): H01M4/58; H01M4/02; H01M10/40

JPH09245836A	1997-09-19
JPH08298115A	1996-11-12
JPH07122299A	1995-05-12

Tono Kono (1 person outside)

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