Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (5): 20220743.doi: 10.7503/cjcu20220743

• Review • Previous Articles     Next Articles

Design of Electrolyte for High Specific Energy Lithium Ion Batteries Working at High Voltage

SUN Zhaoyu1, ZHAO Jingwei2(), LIU Jun1()   

  1. 1.Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510006,China
    2.Guangzhou Tinci Materials Technology Co. Ltd. ,Guangzhou 510760,China
  • Received:2022-11-30 Online:2023-05-10 Published:2023-02-28
  • Contact: ZHAO Jingwei, LIU Jun E-mail:Zhaojingwei@tinci.com;msjliu@scut.edu.cn
  • Supported by:
    the Guangdong Basic and Applied Basic Research Foundation, China(2020B1515120049);the Research & Development Program in Key Areas of Guangdong Province, China(2020B0101030005);the National Natural Science Foundation of China(U21A20332)

Abstract:

The current energy storage devices of lithium ion batteries can hardly satisfy people’s work and living since the advent of portable electronics and electric vehicles. Lithium ion batteries, with their market superiority of commercial energy storage devices, are being researched and developed in the aspects of higher specific energy, longer cycle life and safer performance. The gravimetric and volumetric energy densities of lithium ion batteries can be increased at high-voltage conditions on which the battery systems are unstable. This will attenuate the batteries’ capacity rapidly. Simultaneously, the interface impedance of batteries rises when amounts of decomposition products accumulate. In addition, the generation of harmful gas threatens the safety of the batteries. This paper reviews the development of high voltage electrolyte in allusion to the design of solvent and additive of electrolyte for working at high voltage. Based on the current theoretical researches, this paper also indicates the design focus and future research directions of multifunctional electrolyte for high specific energy lithium ion batteries.

Key words: Lithium ion battery, High voltage electrolyte, High specific energy

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