TiO2/graphene nanocomposites as anode materials for high rate lithium-ion batteries
TiO2/graphene nanocomposites as anode materials for high rate lithium-ion batteries
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DOI：
10.1007/s11771-014-2114-1
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发表时间：
2014-05
影响因子：
4.4
通讯作者：
Yi-ping Tang;Shi-ming Wang;Xiao-xu Tan;Guangya Hou;G. Zheng
中科院分区：
文献类型：
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作者：
Yi-ping Tang;Shi-ming Wang;Xiao-xu Tan;Guangya Hou;G. Zheng
报道了一种制备纳米TiO 2/石墨烯纳米片（GNS）杂化材料作为锂离子电池负极材料的简单方法。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）和透射电子显微镜（TEM）研究了样品的形貌和晶体结构。通过恒电流充放电测试和交流阻抗谱来评价其电化学性能。结果表明，无论负载量是多少，TiO 2/GNS电极的电化学性能均优于TiO 2电极。即使在500 mA/g下，TiO 2/GNS的容量也为120.3 mAh/g，高于TiO 261.6 mAh/g。高性能归因于石墨烯的添加，以提高导电性并减少极化。
A simple strategy to prepare a hybrid of nanocomposites of anatase TiO2/graphene nanosheets (GNS) as anode materials for lithium-ion batteries was reported. The morphology and crystal structure were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The electrochemical performance was evaluated by galvanostatic charge-discharge tests and alternating current (AC) impedance spectroscopy. The results show that the TiO2/GNS electrode exhibit higher electrochemical performance than that of TiO2electrode regardless of the rate. Even at 500 mA/g, the capacity of TiO2/GNS is 120.3 mAh/g, which is higher than that of TiO261.6 mAh/g. The high performance is attributed to the addition of graphene to improve electrical conductivity and reduce polarization.