Energy Storage Science and Technology ›› 2024, Vol. 13 ›› Issue (7): 2300-2307.doi: 10.19799/j.cnki.2095-4239.2024.0379

• Special Issue on Low Temperature Batteries • Previous Articles     Next Articles

Testing standards and developmental advances for low-temperature Li-ion batteries

Wentao WANG1(), Yifan WEI1, Kun HUANG1, Guowei LV1, Siyao ZHANG1, Xinya TANG1, Zeyan CHEN1, Qingyuan LIN1, Zhipeng MU1, Kunhua WANG1, Hua CAI2, Jun CHEN1,3()   

  1. 1.CVC Testing Technology Co. , Ltd. , China National Electric Apparatus Research Institute Co. , Ltd. , Guangzhou 510000, Guangdong, China
    2.CVC Testing Technology (Jiaxing) Co. , Ltd. , China National Electric Apparatus Research Institute Co. , Ltd. , Jiaxing 314000, Zhejiang, China
    3.State & Key Laboratory of Environmental Adaptability for Industrial Products, China National Electric Apparatus Research Institute Co. , Ltd. , Guangzhou 510000, Guangodng, China
  • Received:2024-05-06 Revised:2024-05-29 Online:2024-07-28 Published:2024-07-23
  • Contact: Jun CHEN E-mail:wangwt@cei1958.com;J-chen@cei958.com

Abstract:

Lithium-ion batteries (LIBs) have gradually extended to the field of low-temperature environment because of their advantages such as high energy density, long cycle life and no memory effect. However, LIBs suffer from rapid capacity decay and poor rate performance in low-temperature environment. Based on the discussion of the recent relevant literature, this paper makes a differentiation analysis of the existing LIBs test standards, focusing on the difference of different test standards on the low-temperature test conditions and technical requirements. The strategy of improving low-temperature performance of LIBs is introduced mainly from the Angle of electrolyte design and electrode material design. In the aspect of electrolyte design, the strategies of electrolyte additive design, co-solvent design, lithium salt modification design and lithium salt and solvent composite modification design are introduced. In the aspect of electrode material design, the strategies of nanization, doping, coating, doping/coating composite modification and heterojunction design are mainly introduced. The comprehensive analysis shows that, combined with the requirements of existing LIBs test standards, the strategy of electrolyte modification design combined with electrode material structure design is expected to overcome the problems such as fast capacity decay and poor rate performance of LIBs at low temperatures by improving the ionic conductivity of electrolyte and enhancing the charge transfer ability of electrode materials.

Key words: lithium-ion battery, low-temperature performance, electrolyte, testing standards

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