Cathode formed of graphite/carbon composite for lithium ion seco

Details Cathode formed of graphite/carbon composite for lithium ion seco Cathode formed of graphite/carbon composite for lithium ion seco

1996-02-21

2000-10-31

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429217, 429324, H01M 438

Patent

active

061399892

ABSTRACT:
A high crystallinity powdery graphite is mixed with an organic binder capable of forming a low crystallinity carbon after firing. A high shearing force is applied to the mixture so that a composition is obtained wherein both the components are dispersed in each other under a mechano-chemical reaction. Then a paste of the composition is extruded so that the high crystallinity graphite is highly oriented. A green extrudate of the composition is fired in an inert atmosphere or a non-oxidation atmosphere at a temperature in a range between 500 and 1,100.degree. C. so that the organic binder contained therein is carbonized and a graphite-carbon carbonaceous composite of an amorphous or random layered structure is obtained, which then is ground and used as a cathode for a lithium ion secondary battery.

REFERENCES:
patent: 4157317 (1979-06-01), Nagasawa et al.
patent: 5028500 (1991-07-01), Fong et al.
patent: 5273639 (1993-12-01), Kaneko et al.

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