Nb2O5 nanospheres/surface-modified graphene composites as superior anode materials in lithium ion batteries
Nb2O5 nanospheres/surface-modified graphene composites as superior anode materials in lithium ion batteries
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DOI：
10.1016/j.ceramint.2017.02.021
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发表时间：
2017-06
影响因子：
5.2
通讯作者：
Chongfu Shi;Kaixiong Xiang;Yingchun Zhu;Xian-hong Chen;Wei Zhou;Han Chen
中科院分区：
文献类型：
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作者：
Chongfu Shi;Kaixiong Xiang;Yingchun Zhu;Xian-hong Chen;Wei Zhou;Han Chen
采用水热法合成了均匀的Nb2O5纳米球/表面改性石墨烯（SMG）复合材料，用于锂离子电池负极材料。通过X射线衍射、扫描电子显微镜和透射电子显微镜技术研究了复合材料的微观结构和形貌。实验结果表明，Nb2O5纳米球紧密、均匀地生长在SMG纳米片表面。 Nb2O5纳米球/SMG复合材料在40 mA g−1的电流密度下循环100次后表现出令人印象深刻的404.6 mA h g−1的可逆容量，在400 mA g−1的电流密度下表现出345.5 mA h g−1的优异倍率容量。
Uniform Nb2O5nanospheres/surface-modified graphene (SMG) composites for anode materials in lithium ion batteries were synthesized by hydrothermal method. The microstructure and morphology of composites were investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscope techniques. The experimental results showed that Nb2O5nanospheres were tightly and uniformly grown on the surface of SMG nanosheets. Nb2O5nanospheres/SMG composites exhibited an impressive reversible capacity of 404.6 mA h g−1at the current density of 40 mA g−1after 100 cycles, and an excellent rate capacity of 345.5 mA h g−1at the current density of 400 mA g−1.