Title:
COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREFOR, AND ELECTRIC DEVICE COMPRISING COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2024/051216
Kind Code:
A1
Abstract:
A preparation method for a composite positive electrode active material, comprising: S100, providing a positive electrode active material particle; S200, providing a solid aluminum salt to the positive electrode active material particle, so that the surface of the positive electrode active material particle is coated with the solid aluminum salt; and S300, providing a solid alkali to the positive electrode active material particle coated with the solid aluminum salt, so that the solid aluminum salt and the solid alkali experience an in-situ solid-phase chemical reaction to generate a coating layer with which the surface of the positive electrode active material particle is coated, to prepare a composite positive electrode active material, wherein the coating layer comprises a nano-aluminum oxide particle. The preparation method is simple, involves low cost and energy consumption, and has high aluminum oxide yield; moreover, the aluminum oxide can uniformly coat the surface of the positive electrode active material particle, so that the positive electrode active material is effectively protected, thereby ensuring the electrochemical performance of the positive electrode active material.
Inventors:
LIU SHAOJUN (CN)
ZHAN WENWEI (CN)
ZHANG XINXIN (CN)
OUYANG CHUYING (CN)
LI QINGZHENG (CN)
ZHAN WENWEI (CN)
ZHANG XINXIN (CN)
OUYANG CHUYING (CN)
LI QINGZHENG (CN)
Application Number:
PCT/CN2023/096627
Publication Date:
March 14, 2024
Filing Date:
May 26, 2023
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/62; H01M4/505; H01M4/525
Foreign References:
| CN115148997A | 2022-10-04 | |||
| CN101106190A | 2008-01-16 | |||
| JP2002151077A | 2002-05-24 |
Other References:
LUAN, XINNING: "Study on the Surface Coating Technology by Solid State Reaction at Room Temperature pf LiMn2O4 Cathode Materials of Lithium-ion Batteries", CHINESE MASTER'S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE & TECHNOLOGY II, no. 4, 15 April 2010 (2010-04-15), ISSN: 1674-0246
PENG, ZHONGDONG ET AL.: "Coating of LiNi1/3Mn1/3Co1/3O2 cathode materials with alumina by solid state reaction at room temperature", JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY, vol. 15, no. 1, 1 February 2008 (2008-02-01), XP036944134, ISSN: 1005-9784, DOI: 10.1007/s11771-008-0008-9
LUAN, XINNING ET AL.: "Electrochemical Performance of Al2O3-coated LiMn2O4 Cathode Materials by Solid-state Reaction at Room Temperature", HUNAN NONFERROUS METALS, vol. 25, no. 2, 15 April 2009 (2009-04-15), ISSN: 1003-5540
PENG, ZHONGDONG ET AL.: "Coating of LiNi1/3Mn1/3Co1/3O2 cathode materials with alumina by solid state reaction at room temperature", JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY, vol. 15, no. 1, 1 February 2008 (2008-02-01), XP036944134, ISSN: 1005-9784, DOI: 10.1007/s11771-008-0008-9
LUAN, XINNING ET AL.: "Electrochemical Performance of Al2O3-coated LiMn2O4 Cathode Materials by Solid-state Reaction at Room Temperature", HUNAN NONFERROUS METALS, vol. 25, no. 2, 15 April 2009 (2009-04-15), ISSN: 1003-5540
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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