Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (2): 259-264.doi: 10.1007/s40242-020-0310-0

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Self-crystallized Interlayer Integrating Polysulfide-adsorbed TiO2/TiO and Highly-electron-conductive TiO for High-stability Lithium-Sulfur Batteries

YANG Xinzhe1, QIN Tingting1, ZHANG Xiaoyu1, LIU Xiaofei1, WANG Zizhun1, ZHANG Wei1,2,3, ZHENG Weitao1   

  1. 1. Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science & Engineering, Electron Microscopy Center, International Center of Future Science, Jilin University, Changchun 130012, P. R. China;
    2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
    3. IKERBASQUE, Basque Foundation for Science, Bilbao 48013, Spain
  • Received:2021-09-30 Online:2021-04-01 Published:2021-03-29
  • Contact: ZHANG Wei, ZHENG Weitao E-mail:weizhang@jlu.edu.cn;wtzheng@jlu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(Nos.51932003, 51872115), the 2020 International Cooperation Project of the Department of Science and Technology of Jilin Province, China (No.20200801001GH), the Program for the Development of Science and Technology of Jilin Province, China(No.20190201309JC), the Jilin Province/Jilin University co-Construction Project Funds for New Materials, China(Nos. SXGJSF2017-3, Branch-2/440050316A36), the Innovation Fund of 2018WNLOKF022, the Program for JLU Science and Technology Innovative Research Team, China(No.JLUSTIRT, 2017TD-09), the Fundamental Research Funds for the Central Universities of China, and the “Double-First Class” Discipline for Materials Science & Engineering, China.

Abstract: Low-cost lithium sulfur(Li-S) batteries afford preeminent prospect as a next-generation high-energy storage device by virtue of great theoretical capacity. Nevertheless, their applications are restricted by some challenging technical barriers, such as weak cycling stability and low poor-conductivity sulfur loading ori-ginated in notorious shuttling effect of polysulfide intermediates. Herein, free of any complicated compositing process, we design an interlayer of carbon fiber paper supported TiO2/TiO to impede the shuttle effect and enhance the electrical conductivity via physical isolation and chemical adsorption. Such a self-crystallized homogeneous interlayer, where TiO2/TiO enables absorbing lithium polysulfides(LiPSs) and TiO plays a key role of high-electron-conductivity exhibited ultrahigh capacities(1000 mA·h/g at 0.5 C and 900 mA·h/g at 1 C) and outstanding capacity retention rate(97%) after 100 cycles. Thus, our design provides a simple route to suppress the shuttle effect via self-derived evolution Li-S batteries.

Key words: Lithium sulfur battery, TiO2/TiO, Carbon fiber paper