Production process of carbonaceous material and battery

Details Production process of carbonaceous material and battery Production process of carbonaceous material and battery

1997-09-12

1999-06-08

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

4234474, H01M 458, H01M 460

Patent

active

059103833

ABSTRACT:
A process is provided for the production of a carbonaceous material. The process comprises the following steps: subjecting a vacuum distillation residual pitch to heat treatment until the content of quinoline-insoluble components thereof becomes 50 to 85 wt. %, whereby the pitch is converted into a mesophase pitch; grinding the thus-obtained mesophase pitch into fine particles having an aspect ratio not greater than 2; subjecting the thus-ground product to oxidation treatment; and subjecting the thus-oxidized product to carbonization or graphitization treatment. A lithium ion secondary battery comprises a negative pole made of the carbonaceous material.

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patent: 5622793 (1997-04-01), Iijima et al.

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