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Title:
NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, LITHIUM ION BATTERY, AND TERMINAL
Document Type and Number:
WIPO Patent Application WO/2021/083034
Kind Code:
A1
Abstract:
Embodiments of the present invention provide a negative electrode material, comprising a doped silicon-based material. The doped silicon-based material comprises a silicon-based material and a doping metal element distributed in particles of the silicon-based material, the silicon-based material comprising nano-silicon or silicon monoxide, and the doping amount of the doping metal element being 1-1000 ppm. By doping with an extremely low content of the metal element in the crystal structure of the silicon-based material, the negative electrode material can maintain the stability of the original crystal structure of the silicon-based material while improving the conductivity of the silicon-based material, so that the energy density of a battery cell can be effectively increased, and powdering of the silicon-based material during the charging and discharging process can be prevented. Embodiments of the present invention further provide a preparation method for the negative electrode material, a lithium-ion battery, and a terminal.

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Inventors:
SU HANG (CN)
XU GUOCHENG (CN)
WANG PINGHUA (CN)
LI YANGXING (CN)
Application Number:
PCT/CN2020/123050
Publication Date:
May 06, 2021
Filing Date:
October 23, 2020
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01M4/38; H01M4/52
Foreign References:
CN103427075A2013-12-04
CN103872303A2014-06-18
JP2011192453A2011-09-29
CN103779547A2014-05-07
CN103000934A2013-03-27
CN201911064363A2019-10-30
Other References:
See also references of EP 4044286A4
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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