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Title:
W-CONTAINING HIGH-NICKEL TERNARY POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/000868
Kind Code:
A1
Abstract:
A W-containing high-nickel ternary positive electrode material. The high-nickel ternary positive electrode material simultaneously comprises spherical secondary particles and single-crystal particles. The interior of the single-crystal particles basically contains no W, and the spherical secondary particles are doped with W. The preparation of said material comprises: first mixing nickel salt, cobalt salt and manganese salt according to a molar ratio, and adding ammonia water and a sodium hydroxide solution for co-precipitation to prepare a precursor A; then mixing nickel salt, cobalt salt, manganese salt and tungsten salt to prepare a precursor B containing tungsten by means of the co-precipitation of ammonia water and the sodium hydroxide solution; and mixing the precursor A, the precursor B, a lithium source, and a compound containing a doping element M, and sintering in an oxygen atmosphere at a high temperature to obtain the high-nickel ternary positive electrode material simultaneously comprising the spherical secondary particles and the single-crystal particles. In the positive electrode material, while the capacity of the secondary spherical particles is increased, it can also be ensured that a crystal structure will not undergo significant phase change during the deintercalation of lithium ions in a cyclical process, thus facilitating the improvement of cyclical performance.

Inventors:
KE, Changxuan (CN)
ZHAO, Xuemin (CN)
LI, Mengyuan (CN)
HE, Yulei (CN)
TAN, Xinxin (CN)
LI, Xu (CN)
Application Number:
CN2020/099418
Publication Date:
January 07, 2021
Filing Date:
June 30, 2020
Export Citation:
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Assignee:
HUNAN SHANSHAN NEW ENERGY CO., LTD. (CN)
International Classes:
H01M4/36
Attorney, Agent or Firm:
CHANGSHA ZONEYOUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) et al. (CN)
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