J. Mater. Sci. Technol. ›› 2020, Vol. 55: 1-15.DOI: 10.1016/j.jmst.2020.01.001

• Invited Review •     Next Articles

Advanced Li-SexSy battery system: Electrodes and electrolytes

Huan Dua, Shihao Fenga, Wen Luoa,b,*(), Liang Zhoua, Liqiang Maia,*()   

  1. a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
    b Department of Physics, School of Science, Wuhan University of Technology, Wuhan, 430070, China
  • Received:2019-05-21 Accepted:2019-10-06 Published:2020-10-15 Online:2020-10-27
  • Contact: Wen Luo,Liqiang Mai
  • About author:Huan Du is currently an undergraduate student from the International School of Materials Science and Engineering (ISMSE) at Wuhan University of Technology (WUT) since 2016. He has joined the tutorial system of undergradu-ates at the WUT Nano Key Laboratory and studies in Mai Research Group. His research interests involves nanoma-terials and devices for energy storage.|Wen Luo received her Ph.D. degree in 2018 from the School of Materials Science and Engineering at Wuhan University of Technology under the supervision of Prof. Liqiang Mai. She was a visiting graduate stu-dent (2016-2017) in Prof. Jean-Jacques Gaumet Research Group at Université de Lorraine, France. She is currently an assistant professor at the Department of Physics, School of Science, Wuhan University of Technology. Her research focuses on nanomaterials and devices for energy storage and conversion.|Liqiang Mai is Chang Jiang Scholar Professor and Chair Professor of Materials Science and Engineering at Wuhan University of Technology (WUT). He is the winner of the National Natural Science Fund for Distinguished Young Scholars and Fellow of the Royal Society of Chemistry. He received his Ph.D. degree from WUT in 2004. He car-ried out his postdoctoral research in Prof. Zhonglin Wang’s group at Georgia Institute of Technology in 2006-2007. He worked as advanced research scholar in the laboratory of Prof. Charles M. Lieber at Harvard University in 2008-2011 and the laboratory of Prof. Peidong Yang at University of California, Berkeley in 2017. His current research interests focus on new nanomaterials for electrochemical energy storage and micro/nano energy devices.

Abstract:

The worldwide energy shortage has led to numerous researches for the exploration of new-type battery materials to deal with the energy crisis. To achieve a great leap in energy density, the study of high capacity electrode materials plays a major role. As a replacement to the energy accumulation system of lithium-sulfur (Li-S) and lithium-selenium (Li-Se) batteries, great concern is generated over lithium/selenium-sulfur (Li-SexSy) batteries as they combine the advantages of S (high capacity) and Se (improved electrical conductivity), consequently stands for extensive new cathode materials. In recent years, widespread researches have been conducted and great achievements have been published. This review sums up the research status on Li-SexSy batteries and concentrates on the outstanding work of SexSy cathode materials. The reaction mechanism and capacity fading mechanism are discussed. The performance-structure relationship is stated in regard of different cathode structures, including a variety of carbon hosts, conducting polymer hosts, transition metal-doped carbon electrodes and various Se/S ratio. The compatibilities of frequently-used carbonate-based and ether-based electrolyte and other new-type electrolytes for Li-SexSy battery are demonstrated. Prospects for the future developments of Li-SexSy batteries are finally proposed.

Key words: Selenium-sulfur, Cathode materials, Electrolytes, Lithium-sulfur