(19)
(11) EP 4 177 987 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
21.06.2023 Bulletin 2023/25

(43) Date of publication:
10.05.2023 Bulletin 2023/19

(21) Application number: 21935452.9

(22) Date of filing: 14.09.2021
(51) International Patent Classification (IPC): 
H01M 4/36(2006.01)
H01M 4/525(2010.01)
H01M 4/62(2006.01)
(52) Cooperative Patent Classification (CPC):
Y02E 60/10; C01P 2002/52; C01G 53/42; C01P 2004/86; C01P 2006/40; C01P 2004/61
(86) International application number:
PCT/CN2021/118225
(87) International publication number:
WO 2023/039717 (23.03.2023 Gazette 2023/12)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicant: Contemporary Amperex Technology Co., Limited
Jiaocheng District Ningde Fujian 352100 (CN)

(72) Inventors:
  • WU, Qi
    Fujian 352100 (CN)
  • CHEN, Qiang
    Fujian 352100 (CN)
  • FAN, Jingpeng
    Fujian 352100 (CN)
  • HUANG, Tao
    Fujian 352100 (CN)
  • HUANG, Qisen
    Fujian 352100 (CN)

(74) Representative: Gong, Jinping 
CocreateIP Eggenfeldenerstraße 56
81929 München
81929 München (DE)

   


(54) HIGH-NICKEL POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, LITHIUM ION BATTERY COMPRISING SAME, BATTERY MODULE, BATTERY PACK AND ELECTRICAL DEVICE


(57) The present application provides a high-nickel ternary positive electrode active material, which comprises a core Li1+a[LixCoyMnzMb]O2, a fast ionic conductor LiαAlXSiYO4 of a first shell layer, an oxide of an element R of a second shell layer, and a transition layer LipRqOw formed between the first shell layer and the second shell layer. In the high-nickel ternary positive electrode active material of the present application, the surface impurity lithium amount is significantly reduced, and by creatively converting the surface impurity lithium into effective components in the fast ionic conductors LiαAlXSiYO4 and LipRqOw which accelerate the intercalation/deintercalation of lithium ions in the core material, the decomposition and gas production of an electrolyte solution caused by the surface impurity lithium is greatly improved, such that a high-nickel ternary lithium-ion battery has high energy density as well as good cycle performance and safety performance.