Constructing monodispersed MoSe₂ anchored on graphene: a superior nanomaterial for sodium storage

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• 作者：Zhengqing Liu 刘正清 ; Yi Zhang 张怡 ; Hongyang Zhao 赵洪洋 ; Na Li 李娜…
• 关键词：MoSe2/rGO hybrid nanostructure ; sodium energy storage ; high rate ; long cycle
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：60
• 期：2
• 页码：167-177
• 全文大小：3854KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

We reported a facile and robust one-pot wet chemistry strategy to achieve the growth of uniform three dimensional (3D) MoSe₂ ultrathin nanostructures on graphene nanosheets to form high quality MoSe₂/rGO hybrid nanostructures. Owing to the graphene as a support, it can significantly prevent the aggregation of MoSe₂ and the distribution of MoSe₂ on graphene was highly uniform. Importantly, due to the unique structures, the as-harvested MoSe₂/rGO hybrid exhibited excellent electrochemical performance as anode materials for sodium-ion battery (SIB). When evaluated in a half cell system, the MoSe₂/rGO hybrid nanostructures could deliver a capacity of 200.2 mA h g−1 at 8 A g−1 and maintain a capacity of 230.1 mA h g−1 over 100 cycles at 5 A g−1. When coupled with Na₃V₂(PO₄)₃ cathode in a full cell system, the material could deliver a discharge capacity of 363.1 mA h g−1 at the current density of 0.5 A g−1. Moreover, a discharge capacity of 56.4 mA h g−1 could be achieved even at a high current density of 10 A g−1, which clearly suggested the high power capability of MoSe₂/rGO hybrid nanostructures for sodium ion energy storage.