Facile fabrication of integrated three-dimensional C-MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage
molybdenum diselenide, double modification, carbon coating, graphene skeleton, sodium ion storage
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.
Tsinghua University Press
Dong Xie,Wangjia Tang,Yadong Wang,Xinhui Xia,Yu Zhong,Ding Zhou,Donghuang Wang,Xiuli Wang,Jiangping Tu, Facile fabrication of integrated three-dimensional C-MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage. NanoRes.2016, 9(6): 1618–1629