硒是硫的同族元素，具有较高的电导率、与硫相当的体积比容量，是一种新型锂离子电池正极材料。然而锂硒电池在充放电过程中存在的穿梭效应较大地影响了锂硒电池的电化学性能。目前已有一些关于抑制锂硒电池穿梭效应、提升锂硒电池电化学性能的研究。本文综述了锂硒电池的研究现状，着重介绍了硒碳复合电极的进展，论述了其主要优势及存在的问题，并展望了石墨烯在锂硒电池中的应用，最后对提升锂硒电池电化学性能的关键因素进行了分析。
Selenium is a novel and promising cathode material in lithium ion batteries owing to its high electronic conductivity and a theoretical volumetric capacity comparable to that of S. As a congener of sulfur ( S) , Se has a similar lithiation mechanism to S in charge/discharge when used as the cathode material of a Li-Se battery. However, similar to the Li-S battery, the Li-Se battery suf-fers from a shuttle effect that leads to poor cycle performance and low Coulombic efficiency. This review summarizes recent devel-opments, highlights the excellent performance of Li-Se batteries and focuses on improvements to the carbon/Se composite electrode. The main obstacles are also discussed. The use of porous carbons, especially graphene-based materials, for improving the perform-ance of the Se electrode in high performance Li-Se batteries is highlighted and discussed.
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