Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

作     者：Weizhai Bao Zhian Zhang Yongqing Gan Xiwen Wang Jie Lia 

作者机构：School of Metallurgy and Environment Central South University Engineering Research Center of High Performance Battery Materials and DevicesResearch Institute of Central South University in Shenzhen 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2013年第22卷第5期

页      面：790-794页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the Strategic Emerging Industries Program of Shenzhen,China(JCYJ20120618164543322) the National Natural Science Foundation of China(20803095) 

主　　题：lithium-sulfur battery binder Na-alginate electrochemical performance 

摘      要：Na-alginate as a binder in an aqueous solvent has been applied in the preparation of sulfur cathodes for lithium-sulfur *** electrochemical performances have been investigated by a charge-discharge cycle test and electrochemical impedance spectroscopy (EIS).The EIS tests indicated that the alginate sulfur cathode had lower resistance and better kinetic characteristics than those of the poly (vinylidene fluoride) (PVDF) sulfur cathode using PVDF as a binder in a N-methy-2-pyrrolidone (NMP) *** charge-discharge tests showed that the discharge capacity and the capacity retention rate of Na-alginate sulfur cathode were 508 mAh·g-1and 65.4% at the 50th cycle with a current density of 335 mA·*** with PVDF sulfur cathode,the alginate sulfur cathode showed a remarkably better cycle *** results show that the alginate binder has promising potential for lithium-sulfur battery applications.