一种用于抑制锂硫电池中多硫化物溶解的新型电解质体系。
A New Type of Electrolyte System To Suppress Polysulfide Dissolution for Lithium-Sulfur Battery.
作者信息
Yang Tingzhou, Qian Tao, Liu Jie, Xu Na, Li Yutao, Grundish Nicholas, Yan Chenglin, Goodenough John B
机构信息
College of Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, and Key Laboratory of Modern Optical Technologies of Education Ministry of China , Soochow University , Suzhou 215006 , People's Republic of China.
Materials Science and Engineering Program and Texas Materials Institute , The University of Texas at Austin , Austin , Texas 78712 , United States.
出版信息
ACS Nano. 2019 Aug 27;13(8):9067-9073. doi: 10.1021/acsnano.9b03304. Epub 2019 Jul 24.
Lithium-sulfur (Li-S) batteries have been explored extensively for high-capacity electric-power storage, but their practical application has been prevented by severe issues stemming from the use of a lithium anode and an organic-liquid electrolyte in which LiS intermediates of the cell discharge reaction are soluble and shuttle to the anode. Both problems are addressed using bis(4-nitrophenyl) carbonate as an additive in the organic-liquid electrolyte. The soluble LiS polysulfides react with the additive to create insoluble polysulfides with a lithium byproduct; this byproduct reacts with the Li-metal anode to create an anode passivation layer that is a good Li conductor, which allows for safe and rapid plating/stripping of lithium metal with a low impedance.
锂硫（Li-S）电池已被广泛研究用于高容量电力存储，但其实际应用受到严重问题的阻碍，这些问题源于使用锂阳极和有机液体电解质，在这种电解质中，电池放电反应的LiS中间体是可溶的，并会穿梭到阳极。通过在有机液体电解质中添加双（4-硝基苯基）碳酸酯解决了这两个问题。可溶性的LiS多硫化物与添加剂反应生成不溶性多硫化物和锂副产物；该副产物与锂金属阳极反应形成一个良好的锂导体阳极钝化层，这使得锂金属能够以低阻抗安全快速地进行电镀/脱镀。
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