Journal
CHEMICAL SCIENCE
Volume 4, Issue 9, Pages 3673-3677Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3sc51476e
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Funding
- Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub
- U.S. Department of Energy, Office of Science, Basic Energy Sciences
- A*STAR National Science Scholarship
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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.
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