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Title:
ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/070989
Kind Code:
A1
Abstract:
An electrochemical device and an electronic device comprising same. A lithium ion secondary battery comprises a positive electrode, a negative electrode, an isolating membrane, and an electrolyte. The positive electrode comprises a first positive electrode material and a second positive electrode material, wherein the first positive electrode material has relatively good cycling stability and relatively high initial coulombic efficiency, and the second positive electrode material has relatively high initial charging specific capacity and relatively low initial coulombic efficiency, so that active lithium loss caused by the formation of an SEI can be compensated for. The lithium ion secondary battery has the advantages of good rate performance and long cycle life.

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Inventors:
ZHOU MOLIN (CN)
Application Number:
PCT/CN2022/075971
Publication Date:
May 04, 2023
Filing Date:
February 11, 2022
Export Citation:
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Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M4/131; H01M4/1315; H01M10/052
Foreign References:
CN110265627A2019-09-20
CN1458705A2003-11-26
CN102569878A2012-07-11
US20110053004A12011-03-03
US6551746B12003-04-22
CN106463768A2017-02-22
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
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