通过分子层沉积涂层实现安全且耐用的高温锂硫电池。
Safe and Durable High-Temperature Lithium-Sulfur Batteries via Molecular Layer Deposited Coating.
机构信息
Department of Mechanical and Materials Engineering, University of Western Ontario , London, Ontario N6A 5B9, Canada.
Department of Chemistry, University of Western Ontario , London, Ontario N6A 5B7, Canada.
出版信息
Nano Lett. 2016 Jun 8;16(6):3545-9. doi: 10.1021/acs.nanolett.6b00577. Epub 2016 May 19.
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.
锂硫（Li-S）电池是电动汽车中极具前景的高能量存储候选者。然而，由于醚基电解液的低沸点和闪点，通常采用的醚基电解液无法实现安全的高温 Li-S 电池。传统的碳酸盐基电解液在高温下具有安全的物理性质，但对于大多数 Li-S 电池来说，无法完成可逆的电化学反应。在这里，我们通过分子层沉积（MLD）氧化铝涂层实现了通用碳硫电极的安全高温 Li-S 电池。涂有 MLD 涂层的硫阴极在碳酸盐电解液中完成了可逆的电化学过程，并在高温下表现出安全且超稳定的循环寿命，这为电动汽车和其他大型储能系统提供了实用的 Li-S 电池。
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