Method for making lithium ion battery anode active material

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United States of America Patent

PATENT NO 9825288
SERIAL NO

14907295

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Abstract

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A method for making a lithium ion battery anode active material comprising: providing silicon particles and a silane coupling agent, wherein the silane coupling agent comprises a hydrolysable functional group and an organic functional group; mixing the silicon particles and the silane coupling agent in water to obtain a first mixture; adding a monomer or oligomer to the first mixture to obtain a second mixture, the surfaces of the silicon particles being coated with a polymer layer by in situ polymerization method to obtain silicon polymer composite material, the monomer or the oligomer reacting with the organic functional group of the silane coupling agent in a polymerization, thereby a generated polymer layer being chemically grafted on the surfaces of the silicon particles; and heating the silicon polymer composite material to carbonize the polymer layer to form a carbon layer coated on the surfaces of the silicon particles.

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Patent Owner(s)

Patent OwnerAddress
TSINGHUA UNIVERSITY100084 NO 1 TSINGHUA YUAN BEIJING HAIDIAN DISTRICT BEIJING CITY BEIJING CITY 100084
JIANGSU HUADONG INSTITUTE OF LI-ION BATTERY CO LTDSUZHOU CITY JIANGSU PROVINCE 215699 ZHANGJIAGANG YANG HUA CHANG LU SUZHOU CITY JIANGSU PROVINCE 215699

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cao, Jiang Beijing, CN 20 55
Cui, Qing-Wei Beijing, CN 1 21
Dai, Zhong-Jia Beijing, CN 4 22
He, Xiang-Ming Beijing, CN 155 589
Li, Jian-Jun Beijing, CN 149 634
Wang, Li Beijing, CN 972 6677

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