A study of the electrochemical processes in lithium-sulphur cells by impedance spectroscopy

被引：189

作者：

Kolosnitsyn, V. S. ^{[1
]}

Kuzmina, E. V. ^{[1
]}

Karaseva, E. V. ^{[1
]}

Mochalov, S. E. ^{[1
]}

机构：

[1] Russian Acad Sci, Lab Electrochem, Inst Russian Acad Sci, Inst Organ Chem,Ufa Sci Ctr, Ufa 450054, Bashkortostan, Russia

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 03期

关键词：

Lithium-sulphur cells; AC impedance; Cycling; Lithium polysulphides; ELECTROLYTE; BATTERY; POLYSULFIDES; BEHAVIOR; CATHODE;

D O I：

10.1016/j.jpowsour.2010.08.105

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1478 / 1482

页数：5

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