▎ 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.