title: Enhanced Performance of a Lithium-Sulfur Battery Using a Carbonate-Based Electrolyte.
abstract: The lithium-sulfur battery is regarded as one of the most promising candidates for lithium-metal batteries with high energy density. However, dendrite Li formation and low cycle efficiency of the Li anode as well as unstable sulfur based cathode still hinder its practical application. Herein a novel electrolyte (1 m LiODFB/EC-DMC-FEC) is designed not only to address the above problems of Li anode but also to match sulfur cathode perfectly, leading to extraordinary electrochemical performances. Using this electrolyte, lithium|lithium cells can cycle stably for above 2000 hours and the average Coulumbic efficiency reaches 98.8 %. Moreover, the Li-S battery delivers a reversible capacity of about 1400 mAh g(-1) sulfur with retention of 89 % for 1100 cycles at 1 C, and a capacity above 1100 mAh g(-1) sulfur at 10 C. The more advantages of this cell system are its outstanding cycle stability at 60 °C and no self-discharge phenomena.
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Jiulin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. yangj723@sjtu.edu.cn.
authors.forename: Jun
authors.identifier: 0000-0002-5270-3803
authors.initials: J
authors.lastname: Yang
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Miao
authors.affiliation: School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Chen
authors.affiliation: School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China.
authors.forename: Ji
authors.initials: J
authors.lastname: Qian
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Rongrong
authors.initials: R
authors.lastname: Miao
keywords: batteries; electrochemistry; electrolytes; energy storage; sulfur