Electrochemical Impedance Spectroscopy Study of a Lithium/Sulfur Battery: Modeling and Analysis of Capacity Fading

被引：606

作者：

Deng, Zhaofeng ^{[1
]}

Zhang, Zhian ^{[1
,2
]}

Lai, Yanqing ^{[1
,2
]}

Liu, Jin ^{[1
]}

Li, Jie ^{[1
,2
]}

Liu, Yexiang ^{[1
]}

机构：

[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

[2] Cent South Univ Shenzhen, Res Inst, Engn Res Ctr High Performance Battery Mat & Devic, Shenzhen 518057, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2013年 / 160卷 / 04期

基金：

中国国家自然科学基金;

关键词：

LOW-TEMPERATURE PERFORMANCE; LI-ION BATTERIES; SULFUR BATTERIES; CATHODE MATERIAL; ELECTRODES; COMPOSITE; CELLS;

D O I：

10.1149/2.026304jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior of a lithium/sulfur (Li/S) battery was studied by electrochemical impedance spectroscopy (EIS). An impedance model based on the analysis of EIS spectra as a function of temperature and depth of discharge was developed. Then, by monitoring the evolution of impedance during the cycling process, the capacity fading mechanism of Li/S battery was investigated. The results show that the semicircle at the middle frequency of the EIS spectra is ascribed to the charge-transfer process and the semicircle at high frequency is related to the interphase contact resistance. Furthermore, electrolyte resistance, interphase contact resistance, and charge-transfer resistance vary with cycle number in different manners, and the charge-transfer resistance is the key factor contributing to the capacity fading of Li/S battery. (C) 2013 The Electrochemical Society. [DOI: 10.1149/2.026304jes] All rights reserved.

引用

页码：A553 / A558

页数：6

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