Secondary battery using system and material for negative electro

Details Secondary battery using system and material for negative electro Secondary battery using system and material for negative electro

1998-09-18

2000-07-04

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

4292314, H01M 458

Patent

active

060836458

ABSTRACT:
A lithium secondary battery suitable for use as a power source for a secondary battery using system such as an electric automobile, motor bicycle or portable equipment includes a negative electrode (17) composed of a carbon material including carbon particles carrying fine particles of a metal which forms an alloy with lithium. The carbon particles have a face-to-face dimension which is 3.354 to 3.369 .ANG. and a crystal grain size in a C-axis direction which is equal to or greater than 300 .ANG.. The metal forming an alloy with lithium has a particle size which is equal to or smaller than 1000 .ANG.. With the use of the charge/discharge capacity of an alloy of the metal and lithium, a value exceeding the theoretical capacity 372 mAh/g of graphite can be obtained. The lithium secondary battery is capable of discharge with an output energy density equal to or higher than 350 W/kg.

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patent: 5401598 (1995-03-01), Miyabayashi et al.
patent: 5501292 (1996-03-01), Kawashima et al.
patent: 5549172 (1996-08-01), Mutoh et al.
patent: 5656394 (1997-08-01), Koksbang et al.

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