Negative electrode material for a rechargeable battery, and method for producing it

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United States of America Patent

PATENT NO 9601758
APP PUB NO 20150340687A1
SERIAL NO

14652950

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Abstract

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The invention relates to a negative electrode powder for a lithium-ion rechargeable battery comprising a mixture comprising carbon and SiOx, with 0x consists of a nanometric composite of crystalline SiO2 and amorphous Si. The method for preparing the powder comprises the steps of providing an aqueous solution comprising an anti-agglomeration agent, dispersing a silicon comprising organic compound in the aqueous solution, hydrothermally treating the aqueous solution at a temperature between 90 and 180° C. for a period of 0.5 to 24 h, preferably between 110 and 140° C. for a period of 0.5 to 4 h, thereby forming a suspension of SiO2 and Si in the aqueous solution, evaporating the solution, thereby obtaining a slurry, subjecting the slurry to a coking process whereby a solid residue is formed, calcining the solid residue at a temperature between 500 and 1300° C., preferably between 600 and 1000° C., in a non-oxidizing atmosphere.

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UMICOREBRUSSELS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bridel, Jean-Sebastien Geel, BE 5 39
Put, Stijn Olmen, BE 32 161
Wang, Jing Hebei, CN 1745 13464
Zhao, Hailei Hebei, CN 2 19

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