Research Article

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2016, 9(6): 1618–1629

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https://doi.org/10.1007/s12274-016-1056-3

Facile fabrication of integrated three-dimensional C-MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage

Dong Xie1, Wangjia Tang1, Yadong Wang2, Xinhui Xia1 (*), Yu Zhong1, Ding Zhou1, Donghuang Wang1, Xiuli Wang1, and Jiangping Tu1 (*)

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1 State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
2 School of Engineering, Nanyang Polytechnic, 569830, Singapore

Keywords: molybdenum diselenide,double modification,carbon coating,graphene skeleton,sodium ion storage
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  • Abstract
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Scrupulous design and fabrication of advanced electrode materials are vital fordeveloping high-performance sodium ion batteries. Herein, we report a facileone-step hydrothermal strategy for construction of a C-MoSe2/rGO compositewith both high porosity and large surface area. Double modification of MoSe2nanosheets is realized in this composite by introducing a reduced grapheneoxide (rGO) skeleton and outer carbon protective layer. The MoSe2 nanosheets arewell wrapped by a carbon layer and also strongly anchored on the interconnectedrGO network. As an anode in sodium ion batteries, the designed C-MoSe2/rGOcomposite delivers noticeably enhanced sodium ion storage, with a highspecific capacity of 445 mAh·g−1 at 200 mA·g−1 after 350 cycles, and 228 mAh·g−1even at 4 A·g−1; these values are much better than those of C-MoSe2 nanosheets(258 mAh·g−1 at 200 mA·g−1 and 75 mAh·g−1 at 4 A·g−1). Additionally, the sodiumion storage mechanism is investigated well using ex situ X-ray diffraction andtransmission electron microscopy methods. Our proposed electrode designprotocol and sodium storage mechanism may pave the way for the fabricationof other high-performance metal diselenide anodes for electrochemical energystorage.
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Facile fabrication of integrated three-dimensional C-MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage. Nano Res. 2016, 9(6): 1618–1629 https://doi.org/10.1007/s12274-016-1056-3

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