A study of the electrochemical processes in lithium-sulphur cells by impedance spectroscopy
A study of the electrochemical processes in lithium-sulphur cells by impedance spectroscopy
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DOI：
10.1016/j.jpowsour.2010.08.105
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发表时间：
2011-02-01
影响因子：
9.2
通讯作者：
Mochalov, S. E.
中科院分区：
文献类型：
--
作者：
Kolosnitsyn, V. S.;Kuzmina, E. V.;Mochalov, S. E.
用交流阻抗谱研究了锂硫电池各组成部分（电解液、硫电极和锂电极）在循环过程中性能的变化。结果表明，在锂硫电池的充放电过程中，电解液的电导率发生了变化。我们认为，所观察到的电解质电导率的变化可以通过电化学反应形成可溶性多硫化锂来解释。电解质的性质显著影响在锂-硫电池中的硫电极和锂电极上发生的电化学过程的速率。(C)2010 Elsevier B. V.保留所有权利。
The changes in the properties of lithium-sulphur cell components (electrolyte, sulphur and lithium electrodes) during cycling are studied by AC impedance spectroscopy. It is shown that during the charge and discharge of lithium-sulphur cells the conductivity of the electrolyte is changed. We believe that the observed changes in the electrolyte conductivity can be explained by the formation of soluble lithium polysulphides by electrochemical reactions. The properties of the electrolyte significantly influence the rate of the electrochemical processes which occur both on the sulphur and lithium electrodes in lithium-sulphur cells. (C) 2010 Elsevier B.V. All rights reserved.