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Issue 9, 2013
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Stable cycling of lithium sulfide cathodes through strong affinity with a bifunctional binder

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Abstract

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.

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

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Article information


Submitted
25 May 2013
Accepted
26 Jun 2013
First published
11 Jul 2013

Chem. Sci., 2013,4, 3673-3677
Article type
Edge Article

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

Z. W. Seh, Q. Zhang, W. Li, G. Zheng, H. Yao and Y. Cui, Chem. Sci., 2013, 4, 3673
DOI: 10.1039/C3SC51476E

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