ELECTRODE AND BATTERY USING THE SAME

Japanese Patent JP3677975

B2

PROBLEM TO BE SOLVED: To suppress heat generation produced through external and internal short-circuits, so as to provide a lithium secondary battery of high safety by causing active material constituting an electrode, electron conductive material touching the same, and an electron conductive collector to have such a character istic (PTC characteristic) as the resistance increases with a rise in temperature.
SOLUTION: Positive electrode active material 11, such as LiCoO2 or the like and electron conductive material 12 sticking thereto, are coupled with a conductive plate made of a metal 15 or carbon and a positive electrode collector 5 made of an electron conductive material 13 by a binder 14, so as to obtain a positive electrode 1. On the other hand, a negative electrode 2 having similar constitution to the positive electrode 1 is obtained from a negative electrode active material layer 7, containing carbon particles or the like and a negative electrode collector 6. Both electrodes are laminated via a separator 3, holding an electrolyte containing lithium ions so as to obtain a lithium secondary battery. As electron conductive materials 12, 13 for the battery, materials having a PTC characteristic, for example, a conductive high molecular polymer having a softening temperature of 150°C or less, barium titanate, or the like is used.

Hisashi Shioda
Hiroaki lacquer field
Tetsuo Mitani
Hideko Uchikawa

JP34506697A

August 03, 2005

December 15, 1997

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Mitsubishi Electric Corporation

H01M4/62; H01M4/13; H01M4/36; H01M10/05; H01M10/0566; (IPC1-7): H01M4/62; H01M4/02; H01M10/40

JP7220755A
JP7161389A

Shogo Takahashi
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka

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