Title:
NEGATIVE ELECTRODE MATERIAL, NEGATIVE ELECTRODE COMPRISING SAME, AND NEGATIVE ELECTRODE PREPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/082291
Kind Code:
A1
Abstract:
A negative electrode material, a negative electrode comprising same, and a negative electrode preparation method. The negative electrode material comprises a silicon-containing material. The silicon-containing material comprises at least one of pure silicon, silicon carbon, silicon alloy, and silicon oxide. The negative electrode material further comprises carbon-containing fluoride. Charging and discharging are performed on a battery consisting of a negative electrode made from the negative electrode material and serving as a working electrode, a counter electrode made from metallic lithium, and an electrolyte containing a lithium-ion conductive material so as to obtain a curve indicating a relationship between a differential value dQ / dV acquired by differentiating charging and discharging capacity Q with respect to an operation electrode potential V, and the operation electrode potential V. When the negative electrode material is energized in a delithiation direction, a ratio B / A of a maximum value B of the differential value dQ / dV between 0.4 V and 0.55 V to a maximum value A of the differential value dQ / dV between 0.2 V and 0.35 V is 1.0-3.0.
Inventors:
ZHANG CHENGBO (CN)
LU YUHAO (CN)
XIE YUANSEN (CN)
LU YUHAO (CN)
XIE YUANSEN (CN)
Application Number:
PCT/CN2020/072938
Publication Date:
May 06, 2021
Filing Date:
January 19, 2020
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
B82Y30/00; H01M4/38; H01M4/48; H01M4/587; H01M4/62; H01M10/0525
Domestic Patent References:
| WO2013042421A1 | 2013-03-28 |
Foreign References:
| CN105283986A | 2016-01-27 | |||
| JP2018147772A | 2018-09-20 | |||
| CN103053066A | 2013-04-17 |
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
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