Synthesis of Sn2Nb2O7-GO nanocomposite as an anode material with enhanced lithium storage performance
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Sn2Nb2O7-GO nanocomposite was prepared via a facile hydrothermal process. The sample presented that Sn2Nb2O7 nanocrystals were homogeneously dispersed and tightly anchored on the surface of the GO nanosheets. The GO nanosheets not only act as a buffer matrix to promote the structural integrity of the active material, but also serve as a conductive media to accelerate the charge transfer and lithium-ion diffusion. As a result, Sn2Nb2O7-GO nanocomposite showed enhanced electrochemical performances compared with pure Sn2Nb2O7 and Mixture. As anode material for lithium-ion batteries, the Sn2Nb2O7-GO electrode exhibited a specific capacity of 576.6 mAh g−1 at 0.1 A g−1 current density after 100 cycles. What is more, at a higher current density 2 A g−1, a reversible capacity of about 237.8 mAh g−1 was achieved.
The authors acknowledgment the support of Project Supported by the Natural Science Foundation of China (No. 51502163), Keypoint Research and Invention in Shaanxi Province of China (No. 2017GY-186), Service local special plan project of Education Department of Shaanxi Province (19JC009), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.
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