双功能
硫化物
锂(药物)
材料科学
阴极
化学
硫黄
阳极
无机化学
化学工程
电极
物理化学
有机化学
催化作用
冶金
工程类
医学
内分泌学
作者
Zhi Wei Seh,Qianfan Zhang,Weiyang Li,Guangyuan Zheng,Hong‐Bin Yao,Yi Cui
出处
期刊:Chemical Science
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:4 (9): 3673-3673
被引量:408
摘要
Rechargeable lithium–sulfur batteries have attracted great interest in recent years because of their high theoretical specific energy, which is several times that of current lithium-ion batteries. Compared to sulfur, fully-lithiated Li2S represents a more attractive cathode material because it enables pairing with safer, lithium metal-free anodes. Here, we demonstrate stable and high-performance Li2S cathodes by using ab initio simulations to guide our rational selection of poly(vinylpyrrolidone) binder which exhibits strong affinity with both Li2S and lithium polysulfides. A high discharge capacity of 760 mA h g−1 of Li2S (∼1090 mA h g−1 of S) was achieved at 0.2 C with stable cycling over prolonged 500 charge/discharge cycles.
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