Nano-silicon composite lithium ion battery anode material coated with poly (3,4-ethylenedioxythiophene) as carbon source and preparation method thereof

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United States of America Patent

PATENT NO 9437870
APP PUB NO 20140113199A1
SERIAL NO

14131385

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Abstract

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A high-performance new silicon composite material for a negative electrode of a lithium ion battery and a preparation method thereof by utilizes a conductive polymer PEDOT and a water solution dispersant PSS as a coating layer of nano-Si powder and a carbon source. The Si/C composite material taking a Si-containing type lithium storage material as a main active substance is prepared by firstly polymerizing PEDOT: PSS on the surface of Si through in-situ polymerization reaction and then performing high-temperature carbonization treatment on a prepared Si/PEDOT: PSS composite under an inert atmosphere. The prepared composite material is doped with a small amount of S element. Nano-Si particles are uniformly embedded in a PEDOT: PSS polymer and a carbon matrix. A high yield is achieved by using cheap raw materials and a simple and environment-friendly process. The prepared Si/C composite material has very low initial irreversible capacity loss (2.8%) and excellent charge-discharge.

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Patent Owner(s)

Patent OwnerAddress
GUANGZHOU INSTITUTE OF ENERGY CONVERSION CHINESE ACADEMY OF SCIENCESNO 2 NENGYUAN ROAD WUSHAN TIANHE DISTRICT GUANGDONG GUANGZHOU 510640

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Suqing Guangzhou, CN 5 11
Yue, Lu Guangzhou, CN 3 4
Zhang, Lingzhi Guangzhou, CN 32 166
Zhao, Xinyue Guangzhou, CN 13 16

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