A new type of electrolyte system to suppress polysulfide dissolution for lithium sulfur battery
A new type of electrolyte system to suppress polysulfide dissolution for lithium sulfur battery
复制标题
一种抑制锂硫电池多硫化物溶解的新型电解液体系
DOI：
10.1021/acsnano.9b03304
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发表时间：
2019
期刊：
影响因子：
17.1
通讯作者：
John B. Goodenough
中科院分区：
文献类型：
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作者：
Tingzhou Yang;Tao Qian;Jie Liu;Na Xu;Yutao Li;Nicholas Grundish;Chenglin Yan;John B. Goodenough
锂-硫（Li-S）电池已经被广泛地探索用于高容量电力存储，但是它们的实际应用已经被源自锂阳极和有机液体电解质的使用的严重问题所阻碍，在所述有机液体电解质中，电池放电反应的Li 2Sx中间体是可溶的并且穿梭到阳极。使用双（4-硝基苯基）碳酸酯作为有机液体电解质中的添加剂来解决这两个问题。可溶性Li 2Sx多硫化物与添加剂反应以产生具有锂副产物的不溶性多硫化物;该副产物与Li金属阳极反应以产生阳极钝化层，该阳极钝化层是良好的Li+导体，其允许以低阻抗安全且快速地电镀/剥离锂金属。
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 Li2Sxintermediates 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 Li2Sxpolysulfides 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.