Stable cycling of lithium sulfide cathodes through strong affinity with a bifunctional binder

被引:417
作者
Seh, Zhi Wei [1 ]
Zhang, Qianfan [2 ]
Li, Weiyang [1 ]
Zheng, Guangyuan [3 ]
Yao, Hongbin [1 ]
Cui, Yi [1 ,4 ]
机构
[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
[2] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[3] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
[4] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
关键词
LI-S BATTERIES; SULFUR BATTERIES; ION BATTERIES; RECHARGEABLE BATTERY; ENERGY; PERFORMANCE; ELECTRODES; COMPOSITES; OXIDATION; CRYSTAL;
D O I
10.1039/c3sc51476e
中图分类号
O6 [化学];
学科分类号
0703 ;
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 (similar to 1090 mA h g(-1) of S) was achieved at 0.2 C with stable cycling over prolonged 500 charge/discharge cycles.
引用
收藏
页码:3673 / 3677
页数:5
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