Negative active material for rechargeable lithium battery and method of preparing same
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United States of America Patent
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Mar 12, 2002
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N/A
app pub date -
Sep 22, 2000
filing date -
Mar 7, 2000
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Abstract
A negative active material for a rechargeable lithium battery which exhibits good high-rate charge characteristics and cycle life characteristics. The active material includes a crystalline carbon core and a semi-crystalline carbon shell. The semi-crystalline carbon shell includes at least one element or a compound of at least two different types of elements and carbides thereof, and has a turbostratic or half onion-sheath. The compound includes only element. The element serves a graphitization catalyst and causes a change in a structure of surrounding carbon. In particular, the negative active material includes metal boride and metal carbide.
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