Safe and Durable High-Temperature Lithium–Sulfur Batteries via Molecular Layer Deposited Coating

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• 作者：Xia Li ; Andrew Lushington ; Qian Sun ; Wei Xiao ; Jian Liu ; Biqiong Wang ; Yifan Ye ; Kaiqi Nie ; Yongfeng Hu ; Qunfeng Xiao ; Ruying Li ; Jinghua Guo ; Tsun-Kong Sham ; Xueliang Sun
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：June 8, 2016
• 年：2016
• 卷：16
• 期：6
• 页码：3545-3549
• 全文大小：447K
• 年卷期：0
• ISSN：1530-6992

文摘

Lithium–sulfur (Li–S) battery is a promising high energy storage candidate in electric vehicles. However, the commonly employed ether based electrolyte does not enable to realize safe high-temperature Li–S batteries due to the low boiling and flash temperatures. Traditional carbonate based electrolyte obtains safe physical properties at high temperature but does not complete reversible electrochemical reaction for most Li–S batteries. Here we realize safe high temperature Li–S batteries on universal carbon–sulfur electrodes by molecular layer deposited (MLD) alucone coating. Sulfur cathodes with MLD coating complete the reversible electrochemical process in carbonate electrolyte and exhibit a safe and ultrastable cycle life at high temperature, which promise practicable Li–S batteries for electric vehicles and other large-scale energy storage systems.