Enhanced Performance of a Lithium-Sulfur Battery Using a Carbonate-Based Electrolyte

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• 作者：Zhixin Xu ; Prof. Jiulin Wang ; Prof. Jun Yang ; Xiaowei Miao ; Prof. Renjie Chen ; Ji Qian and Rongrong Miao
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：August 22, 2016
• 年：2016
• 卷：128
• 期：35
• 页码：10528-10531
• 全文大小：2172K
• ISSN：1521-3757

文摘

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.