SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 52 ›› Issue (12): 88-94.DOI: 10.1016/j.cjche.2022.03.019

• Full Length Article • 上一篇    下一篇

Fabricating titanium dioxide/N-doped carbon nanofibers as advanced interlayer for improving cycling reversibility of lithium-sulfur batteries

Xingmei Guo1, Jinfeng Xie1, Jing Wang1, Shangqing Sun1, Feng Zhang2, Fu Cao1, Yuanjun Liu1, Xiangjun Zheng1, Junhao Zhang1, Qinghong Kong3   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;
    3. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
  • 收稿日期:2022-01-03 修回日期:2022-03-04 出版日期:2022-12-28 发布日期:2023-01-31
  • 通讯作者: Junhao Zhang,E-mail:jhzhang6@just.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (52102100, 52072330), Industry-University-Research Cooperation Project of Jiangsu Province (BY2021525), Guangdong Basic and Applied Basic Research Foundation (2020A1515110035).

Fabricating titanium dioxide/N-doped carbon nanofibers as advanced interlayer for improving cycling reversibility of lithium-sulfur batteries

Xingmei Guo1, Jinfeng Xie1, Jing Wang1, Shangqing Sun1, Feng Zhang2, Fu Cao1, Yuanjun Liu1, Xiangjun Zheng1, Junhao Zhang1, Qinghong Kong3   

  1. 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;
    3. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2022-01-03 Revised:2022-03-04 Online:2022-12-28 Published:2023-01-31
  • Contact: Junhao Zhang,E-mail:jhzhang6@just.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (52102100, 52072330), Industry-University-Research Cooperation Project of Jiangsu Province (BY2021525), Guangdong Basic and Applied Basic Research Foundation (2020A1515110035).

摘要: “Shuttle effect” is detrimental for maintaining the high capacity and cycling reversibility of lithium-sulfur batteries (LSBs). To inhibit polysulfide migration, N-doped carbon nanofibers (N-CNFs) membrane comprising TiO2 nanoparticles (TiO2/N-CNFs) is fabricated using an electrospinning-calcination method and further applied as interlayer in LSBs. The TiO2/N-CNFs interlayer helps the battery to deliver a high specific capacity of 1155.2 mA·h·g-1 at 0.2 C with high Coulombic efficiency, good rate capability and stability. When cycling at 0.5 C, a capacity retention rate of 62.4% is achieved over 300 cycles, which is higher than that of CNFs and TiO2/CNFs counterparts. The excellent performance should mainly be attributed to the alleviated “shuttle effect” deriving from high polysulfide trapping ability of TiO2 nanoparticles and N heteroatoms in interwoven CNFs.

关键词: TiO2/N-CNFs interlayer, Composites, Microstructure, Adsorption, Lithium-sulfur battery, Shuttle effect

Abstract: “Shuttle effect” is detrimental for maintaining the high capacity and cycling reversibility of lithium-sulfur batteries (LSBs). To inhibit polysulfide migration, N-doped carbon nanofibers (N-CNFs) membrane comprising TiO2 nanoparticles (TiO2/N-CNFs) is fabricated using an electrospinning-calcination method and further applied as interlayer in LSBs. The TiO2/N-CNFs interlayer helps the battery to deliver a high specific capacity of 1155.2 mA·h·g-1 at 0.2 C with high Coulombic efficiency, good rate capability and stability. When cycling at 0.5 C, a capacity retention rate of 62.4% is achieved over 300 cycles, which is higher than that of CNFs and TiO2/CNFs counterparts. The excellent performance should mainly be attributed to the alleviated “shuttle effect” deriving from high polysulfide trapping ability of TiO2 nanoparticles and N heteroatoms in interwoven CNFs.

Key words: TiO2/N-CNFs interlayer, Composites, Microstructure, Adsorption, Lithium-sulfur battery, Shuttle effect