High Capacity MoO2/Graphite Oxide Composite Anode for Lithium-Ion Batteries.
High Capacity MoO2/Graphite Oxide Composite Anode for Lithium-Ion Batteries.
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DOI：
10.1021/jz201619r
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
Yun Xu;Ran Yi;Bin Yuan;Xiaofei Wu;Marco Dunwell;Qianglu Lin;Ling Fei;S. Deng;P. Andersen
中科院分区：
文献类型：
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作者：
Yun Xu;Ran Yi;Bin Yuan;Xiaofei Wu;Marco Dunwell;Qianglu Lin;Ling Fei;S. Deng;P. Andersen
采用简单的溶剂热法合成了纳米MoO2/氧化石墨（GO）复合材料。x射线衍射和透射电镜分析表明，随着氧化石墨烯的加入和前驱体溶液中氧化石墨烯含量的增加，MoO3棒转变为MoO2纳米棒，再进一步转变为MoO2纳米棒，并且纳米棒或纳米颗粒均匀分布在复合材料中氧化石墨烯薄片的表面。含有10 wt %氧化石墨烯的MoO2/GO复合材料在100 mA/g电流密度下具有720 mAh/g的可逆容量，在800 mA/g高电流密度下具有560 mAh/g的可逆容量。复合材料的可逆容量、速率容量和循环性能的提高主要归功于MoO2和GO之间的协同反应。
Nanostructured MoO2/graphite oxide (GO) composites are synthesized by a simple solvothermal method. X-ray diffraction and transmission electron microscopy analyses show that with the addition of GO and the increase in GO content in the precursor solutions, MoO3 rods change to MoO2 nanorods and then further to MoO2 nanoparticles, and the nanorods or nanoparticles are uniformly distributed on the surface of the GO sheets in the composites. The MoO2/GO composite with 10 wt % GO exhibits a reversible capacity of 720 mAh/g at a current density of 100 mA/g and 560 mAh/g at a high current density of 800 mA/g after 30 cycles. The improved reversible capacity, rate capacity, and cycling performance of the composites are attributed to synergistic reaction between MoO2 and GO.