Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (6): 1292-1299.doi: 10.1016/j.cjche.2017.12.010

• Catalysis • Previous Articles     Next Articles

A phase inversion based sponge-like polysulfonamide/SiO2 composite separator for high performance lithium-ion batteries

Xiao Wang1,2,3, Gaojie Xu2,3, Qingfu Wang1,2, Chenglong Lu1,2, Chengzhong Zong1, Jianjun Zhang2, Liping Yue2, Guanglei Cui2   

  1. 1 School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
    2 Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
  • Received:2017-09-11 Revised:2017-12-22 Online:2018-06-28 Published:2018-08-03
  • Contact: Chengzhong Zong,E-mail;Guanglei Cui,E-mail;
  • Supported by:

    Supported by the funding from "135" Projects Fund of CAS-QIBEBT Director Innovation Foundation, Think-Tank Mutual Fund of Qingdao Energy Storage Industry Scientific Research, Qingdao Key Lab of Solar Energy Utilization and Energy Storage Technology, the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA09010105), National Natural Science Foundation of China (51502319), and Shandong Provincial Natural Science Foundation (ZR2016BQ18).

Abstract: In this work, a sponge-like polysulfonamide (PSA)/SiO2 composite membrane is unprecedentedly prepared by the phase inversion method, and successfully demonstrated as a novel separator of lithium-ion batteries (LIBs). Compared to the commercial polypropylene (PP) separator, the sponge-like PSA/SiO2 composite possesses better physical and electrochemical properties, such as higher porosity, ionic conductivity, thermal stability and flame retarding ability. The LiCoO2/Li half-cells using the sponge-like composite separator demonstrate superior rate capability and cyclability over those using the commercial PP separator. Moreover, the sponge-like composite separator can ensure the normal operation of LiCoO2/Li half-cell at an extremely high temperature of 90℃, while the commercial PP separator cannot. All these encouraging results suggest that this phase inversion based sponge-like PSA/SiO2 composite separator is really a promising separator for high performance LIBs.

Key words: Polysulfonamide/SiO2 composite, Phase inversion method, Separator, Performance enhancement, Lithium-ion battery