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Title of Journal: Nano Res

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Abbravation: Nano Research

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Tsinghua University Press

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DOI

10.1007/s10608-015-9681-9

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1998-0000

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MIL100V and MIL100V/rGO with various valence

Authors: Yaping Hou Hongzhi Mao Liqiang Xu
Publish Date: 2016/10/28
Volume: 10, Issue: 1, Pages: 344-353
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Abstract

MIL100V is an inorganic–organic hybrid material composed of trimesic acid ligands and vanadium trimer supertetrahedra MIL100V is expected to be a good host for sulfur impregnation and an excellent sulfur cathode host for LiS batteries not only because of its unique mesoporous structure but also owing to the presence of vanadium ions with various valence states which can offer different Lewis acid sites and allow for strong interactions with sulfur and lithium polysulfides In this study mesoporous MIL100V and MIL100V/reduced graphene oxide rGO composites have been applied as novel hosts for LiS batteries for the first time When tested as cathodes for LiS batteries both SMIL100V and SMIL100V/rGO exhibit excellent electrochemical performance The SMIL100V cathode has been demonstrated to have a reversible capacity of ~550 mAh/g at 01 C 1 C = 1675 mAh/g after 200 cycles with low capacity fading of 017 per cycle Moreover SMIL100V/rGO maintains a capacity of 650 mAh/g at 01 C after 75 cycles whereas at 05 C the capacity is maintained at 500 mAh/g after 200 cycles and 450 mAh/g after 300 cycles The above results reveal that the use of MIL100V and MIL100V/rGO as hosts for LiS batteries can effectively enhance the cycling stability and improve the electrochemical performance of LiS batteriesThis research is financial supported by the National Nature Science Foundation of China No 21471091 Academy of Sciences large apparatus United Fund No 11179043 the Fundamental Research Funds of Shandong University No 2015JC007 and the Taishan Scholar Project of Shandong Province No ts201511004

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