The electrochemical properties of high-capacity sulfur/reduced graphene oxide with different electrolyte systems

被引:33
作者
Wang, Yun-Xiao [1 ]
Chou, Shu-Lei [1 ]
Liu, Hua-Kun [1 ]
Dou, Shi-Xue [1 ]
机构
[1] Univ Wollongong, ISEM, Wollongong, NSW 2519, Australia
基金
澳大利亚研究理事会;
关键词
Electrolyte; LiNO3; additive; Lithium-sulfur battery; S/RGO cathode; LITHIUM-SULFUR BATTERIES; CATHODE; PERFORMANCE; COMPOSITE;
D O I
10.1016/j.jpowsour.2012.11.152
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 lithium/sulfur battery is a promising electrochemical system with high capacity, which is well-known to undergo a complex multistep reaction during the discharge process. Two types of electrolytes including poly(ethylene glycol) dimethyl ether (PEGDME)-based and 1,3-dioxolane (DOL)/dimethoxyethane (DME)-based electrolytes were investigated here. Furthermore, LiNO3 additive was introduced into the electrolyte in order to effectively eliminate the overcharge effect. The lithium sulfur battery with 1.0 M LiN(CF3SO2)(2) in PEGDME with 0.1 M LiNO3 shows highly stable reversible capacity of 624.8 mAh g(-1) after 200 cycles and improved average coulombic efficiency of 98%. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:240 / 245
页数:6
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