Title:
NEGATIVE ELECTRODE MATERIAL, ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/189317
Kind Code:
A1
Abstract:
Provided is a negative electrode material. The negative electrode material contains silicon composite particles, the silicon composite particles containing amorphous silicon particles and a buffer phase, wherein the amorphous silicon particles are dispersed in the buffer phase, and the non-uniformity of the amorphous silicon particles dispersed in the buffer phase is less than or equal to 30%. The present application also provides an electrochemical device comprising the negative electrode material and an electronic device comprising the electrochemical device. In the present application, by means of controlling the non-uniformity of the amorphous silicon particles dispersed in the buffer phase in the silicon composite particles to avoid the cracking of particles caused by the anisotropy of the expansion of the silicon composite particles, the volume energy density of the negative electrode material is increased while the expansion problem of the silicon negative electrode material is improved, such that the cycle performance and service life of the electrochemical device is improved.
Inventors:
JIANG CHENXI (CN)
ZHANG YAFEI (CN)
XIE YUANSEN (CN)
YU HONGMING (CN)
ZHANG YAFEI (CN)
XIE YUANSEN (CN)
YU HONGMING (CN)
Application Number:
PCT/CN2020/081183
Publication Date:
September 30, 2021
Filing Date:
March 25, 2020
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
DONGGUAN AMPEREX TECH LTD (CN)
DONGGUAN AMPEREX TECH LTD (CN)
International Classes:
H01M4/134; H01M4/36; H01M4/38
Foreign References:
| CN103779536A | 2014-05-07 | |||
| CN104937751A | 2015-09-23 | |||
| CN108630912A | 2018-10-09 | |||
| CN104577081A | 2015-04-29 | |||
| JP2012178269A | 2012-09-13 |
Attorney, Agent or Firm:
SHENZHEN SCIENBIZIP INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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