期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 799, 期 -, 页码 345-350出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.05.366
关键词
Carbon aerogel microspheres; Structural stability; Lithium-sulfur batteries; Polysulfide adsorbent
资金
- Natural Science Foundation of China [51502063]
- Fundamental Research Fundation for Universities of Heilongjiang Province [LGYC2018JQ006]
- Science Funds for Young Innovative Talents of HUST [201505]
It is extremely critical to prevent the loss of sulfur active material and shuttle reaction of polysulfide through into electrolyte in high-performance lithium-sulfur batteries. In this paper, we reported sulfur-impregnated SnO2/carbon aerogel core-shell microspheres as a polysulfide adsorbent for lithium-sulfur battery. The core of carbon aerogel microspheres is able to accommodate increasing volume and the shell of SnO2 works as high-efficiency polysulfide trap for the flexible structure of SnO2/carbon aerogel core-shell microspheres at full capacity. The obtained core-shell cathodes demonstrate significantly improved electrochemical performance (949 mAh g(-1) at 0.1C). The capacities are remain 785 mAh g(-1) over 80 cycles and high capacity retention of 76.9%. This positive result is owing to unique structure of core-shell microspheres with fast ion/electron transfer path and good structural stability. (C) 2019 Elsevier B.V. All rights reserved.
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