Title:
SILICON-BASED NEGATIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF IN LITHIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/114556
Kind Code:
A1
Abstract:
A silicon-based negative electrode material, a preparation method therefor and a use thereof in a lithium-ion battery. The silicon-based negative electrode material comprises a silicon-based active material and a composite layer that coats the surface of the silicon-based active material and comprises a flexible polymer, flake graphite and a conductive material. The method comprises: 1) dissolving the flexible polymer into a solvent; 2) adding the flake graphite and the conductive material into the flexible polymer solution obtained in step 1) while stirring; 3) adding an anti-solvent to the mixed coating solution obtained in step 2) and stirring; 4) adding the silicon-based active material to the supersaturated mixed coating solution obtained in step 3) while stirring, and then stirring and separating; and 5) carrying out thermal treatment to obtain the silicon-based negative electrode material.
Inventors:
DENG ZHIQIANG (CN)
PANG CHUNLEI (CN)
REN JIANGUO (CN)
HUANG YOUYUAN (CN)
YUE MIN (CN)
PANG CHUNLEI (CN)
REN JIANGUO (CN)
HUANG YOUYUAN (CN)
YUE MIN (CN)
Application Number:
PCT/CN2018/118102
Publication Date:
June 20, 2019
Filing Date:
November 29, 2018
Export Citation:
Assignee:
SHENZHEN BTR NEW ENERGY MAT INC (CN)
International Classes:
H01M4/36
Foreign References:
| CN108054368A | 2018-05-18 | |||
| CN102792498A | 2012-11-21 | |||
| CN106058167A | 2016-10-26 | |||
| CN107369835A | 2017-11-21 | |||
| CN106229495A | 2016-12-14 | |||
| CN105186003A | 2015-12-23 |
Other References:
See also references of EP 3726630A4
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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