Title:
HIGH-NICKEL POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, LITHIUM ION BATTERY COMPRISING SAME, BATTERY MODULE, BATTERY PACK AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/039717
Kind Code:
A1
Abstract:
The present application provides a high-nickel ternary positive electrode active material, comprising a Li1+a[NixCoyMnzMb]O2 core, a fast ion conductor LiαAlXSiYO4 in a first shell layer, an oxide of an element R in a second shell layer, and a transition layer LipRqOw formed between the first shell layer and the second shell layer. The high-nickel ternary positive electrode active material of the present application has a significantly reduced amount of surface impure lithium. Furthermore, the surface impure lithium is creatively transformed into an effective component in the fast ion conductor LiαAlXSiYO4 and the LipRqOw that accelerate the intercalation/extraction of lithium ions in the core material, and electrolyte decomposition and gas production caused by surface impure lithium are significantly improved, such that the high-nickel ternary lithium ion battery not only has high energy density but also has excellent cycle performance and safety performance.
Inventors:
WU QI (CN)
CHEN QIANG (CN)
FAN JINGPENG (CN)
HUANG TAO (CN)
HUANG QISEN (CN)
CHEN QIANG (CN)
FAN JINGPENG (CN)
HUANG TAO (CN)
HUANG QISEN (CN)
Application Number:
PCT/CN2021/118225
Publication Date:
March 23, 2023
Filing Date:
September 14, 2021
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/36; H01M4/525; H01M4/62
Foreign References:
| CN112349905A | 2021-02-09 | |||
| CN110690435A | 2020-01-14 | |||
| CN108807931A | 2018-11-13 | |||
| CN108598400A | 2018-09-28 |
Other References:
ZHANG, XIANG ET AL.: "A facile in-situ coating strategy for Ni-rich cathode materials with improved electrochemical performance", ELECTROCHIMICA ACTA, vol. 383, 11 April 2021 (2021-04-11), pages 2 - 11, XP086557154, ISSN: 0013-4686, DOI: 10.1016/j.electacta.2021.138297
See also references of EP 4177987A4
See also references of EP 4177987A4
Attorney, Agent or Firm:
PEKSUNG INTELLECTUAL PROPERTY LTD. (CN)
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