Unique electrochemical behavior of heterocyclic selenium

By Wei, Yanju; Tao, Yingqing; Kong, Zhenkai; Liu, Lei; Wang, Jitong; Qiao, Wenming; Ling, Licheng; Long, Donghui
Published in Energy Storage Materials NULL 2016

Abstract

Abstract Mixed chalcogenide systems represent a new class of promising cathode materials for high performance rechargeable lithium batteries. Among them, heterocyclic selenium-sulfur (SexSy) cathodes, coupling the good conductivity of Se and high capacity of S, have attracted great attention in recent years. However, further research is still needed to better understand the lithiation/delithiation process of SexSy cathodes in ether-based electrolytes. Herein, SexSy-based composites with covalent Se-S bonds were prepared by infiltrating various proportions of S and Se powders into the mesoporous carbon microsphere (MCM) host at 500

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