Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (11): 2520.doi: 10.7503/cjcu20180321

• Physical Chemistry • Previous Articles     Next Articles

Effect of Derivatives of Glycerol Sulfite as Electrolyte Additive on Electrochemical Performance of Lithium Ion Battery

AI Shujuan1, ZONG Chengxing1, WU Wei1, FENG Jingjing1, JIN Can1, FU Fengzhi1, LIU Jing1,*(), SUN Donglan2,*(), ZHENG Qin3, GUO Yeping3   

  1. 1.College of Chemical Engineering and Material Science, Tianjin University of Science and Technology, Tianjin 300457, China
    2.College of Science, Tianjin University of Science and Technology, Tianjin 300457, China
    3.Hangzhou Future Power Technology Co., Ltd, Hangzhou 311402, China
  • Received:2018-04-25 Online:2018-11-10 Published:2018-06-26
  • Contact: LIU Jing,SUN Donglan E-mail:jingliu@tust.edu.cn;sundonglan@tust.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21373150).

Abstract:

Three compounds, bis-[(2-oxido-1,3,2-dioxathiolan-4-yl)methyl]terephthalate(BMTP), tris[(2-oxido-1,3,2-dioxathiolan-4-yl)methyl]benzene-1,3,5-tricarboxylate(TMBT1) and tetrakis[(2-oxido-1,3,2-dioxathiolan-4-yl)methyl]benzene-1,2,4,5-tetracarboxylate(TMBT2), were designed and synthesized. Those compounds were added in lithium ion battery and their effect was thoroughly investigated by rate of charge and discharge test, galvanostatic charge and discharge test, electrochemical impedance spectroscopy(EIS) and scanning electron microscopy(SEM). The results showed that a dense and stable solid electrolyte interface(SEI) layer could be formed on the surface of the spheroidized graphite electrode with TMBT1, improving the electrode-electrolyte interface. And the increase of impedance with TMBT1 as electrolyte additive after 80 cycles was small. The performance test of battery show that the addition of TMBT1 can improve the rate performance and cycle stability of the battery, while the addition of BMTP and TMBT2 did not make the battery performance better. The results also suggest that number of cycle sulfite group on benzene ring has a huge influence on the performance of the lithium ion battery.

Key words: Electrolyte additive, Derivatives of glycerol sulfite, Lithium ion battery, Solid electrolyte interface(SEI) layer

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