Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (6): 717-723.DOI: 10.15541/jim20190285

Special Issue: 2020年能源材料论文精选(二):超级电容器

• RESEARCH PAPER • Previous Articles     Next Articles

Sawing Angles on Property of Lithium-sulfur Battery Interlayer Prepared with Birch Derived Orientedly Microchannel Biochar

JIANG Hao,WU Hao,HOU Chengyi,LI Yaogang,XIAO Ru,ZHANG Qinghong(),WANG Hongzhi()   

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2019-06-12 Revised:2019-09-02 Published:2020-06-20 Online:2019-09-20
  • Supported by:
    Fundamental Research Funds for the Central Universities(2232019A3-02);National Natural Science Foundation of China(51672043);DHU Distinguished Young Professor Program(LZB2019002)

Abstract:

Bio-source materials have attracted wide attention due to their rich sources, recyclability, pollution-free and multi-functional properties. Herein, a lithium-sulfur battery interlayer was obtained by slicing the birch at different angles, following with the delignification and carbonization processes. Biochar containing lots of micropores and mesopores shows a specific surface area up to 267.7 m 2/g. The biochar interlayer sawing along 45° achieved the highest electrochemical performances. Based on this biochar interlayer, lithium-sulfur battery exhibits a high initial capacity of 979.4 mAh/g at 0.2C (1C=1650 mA/g) and retains a discharge specific capacity of 625.4 mAh/g after 200 cycles, which degrades only 0.18% per cycle. Furthermore, the hierarchical microchannel and transpiration of birch effectively adsorb polysulfide and reduce the shuttle effect, suggesting that it can be widely employed in commercial lithium sulfur battery.

Key words: lithium-sulfur battery, bionics, birch, interlayer

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