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Patent Searching and Data


Title:
MICROCAPSULE TYPE SILICON-CARBON COMPOSITE NEGATIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/052572
Kind Code:
A1
Abstract:
Disclosed is a microcapsule type silicon-carbon composite negative electrode material. The negative electrode material comprises a current collector and a silicon-carbon coating which is formed by drying silicon-carbon slurry with which the current collector is coated; the silicon-carbon slurry comprises carbon slurry and silicon capsule powder dispersed in the carbon slurry; the carbon slurry comprises a dispersing agent, and a carbon material, a first conductive agent, and a first binder dispersed in the dispersing agent; the silicon capsule powder comprises silicon powder and a second binder with which the surface of the silicon powder is coated; a microcapsule structure is formed between the second binder and the silicon powder coated by the second binder; and the first binder is different from the second binder. The improved silicon-carbon composite negative electrode material in the present invention has excellent cycle performance, coulombic efficiency, and rate capability.

Inventors:
ZHENG HONGHE (CN)
YANG SIMING (CN)
ZHENG XUEYING (CN)
ZHANG XIAOHUI (CN)
Application Number:
CN2018/106160
Publication Date:
March 21, 2019
Filing Date:
September 18, 2018
Export Citation:
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Assignee:
JIANGSU DAOYING TECH CO LTD (211400, CN)
International Classes:
H01M4/36
Foreign References:
CN107658450A2018-02-02
CN105576248A2016-05-11
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT AND TRADEMARK AGENCY, LTD. (215002, CN)
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