On the Surface Chemical Aspects of Very High Energy Density, Rechargeable Li-Sulfur Batteries
On the Surface Chemical Aspects of Very High Energy Density, Rechargeable Li-Sulfur Batteries
复制标题
DOI：
10.1149/1.3148721
复制
发表时间：
2009-01-01
影响因子：
3.9
通讯作者：
Affinito, John
中科院分区：
文献类型：
--
作者：
Aurbach, Doron;Pollak, Elad;Affinito, John
由于两个电极的高容量，Li（金属）-硫（Li-S）系统是具有最高可能能量密度的可再充电电池之一。采用傅里叶变换红外光谱和X射线光电子能谱对锂硫电池电解质溶液中锂电极的表面化学进行了严格的研究。一种特殊的方法被开发用于处理高活性锂样品。可以分析溶剂如1-3二氧戊环、电解质LiN（SO2 CF 3）（2）、多硫化物（Li 2Sn）和LiNO 3添加剂对在Li电极上形成的保护表面膜的贡献。本文讨论并解释了LiNO 3作为关键组分的作用，其在溶液中的存在防止了限制硫电极容量的穿梭机制。
Li(metal)-sulfur (Li-S) systems are among the rechargeable batteries of the highest possible energy density due to the high capacity of both electrodes. The surface chemistry developed on Li electrodes in electrolyte solutions for Li-S batteries was rigorously studied using Fourier transform infrared and X-ray photoelectron spectroscopies. A special methodology was developed for handling the highly reactive Li samples. It was possible to analyze the contribution of solvents such as 1-3 dioxolane, the electrolyte LiN(SO2CF3)(2), polysulfide (Li2Sn), and LiNO3 additives to protective surface films that are formed on the Li electrodes. The role of LiNO3 as a critical component whose presence in solutions prevents a shuttle mechanism that limits the capacity of the sulfur electrodes is discussed and explained herein.