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中文摘要：
以TiOSO4为钛源,多壁碳纳米管（MWNTs）为载体,溶剂热法制备了多壁碳纳米管/二氧化钛纳米复合材料（TiO2@MWNTs）,并利用XRD,SEM,TEM,N2吸附-脱附和TG-DSC等测试手段对合成产物的结构和形貌进行表征,用恒流充放电测试研究TiO2@MWNTs纳米复合材料的储锂性能.N2吸附-脱附曲线和孔径分布曲线证实TiO2@MWNTs存在多级孔道结构以及较大的比表面积.电化学测试结果表明,与纯TiO2颗粒相比,TiO2@MWNTs纳米复合材料具有更好的容量保持率和倍率性能.在1 C倍率下,复合材料的可逆容量为200 mAh？g-1,循环100圈后容量仍达182 mAh？g-1,即使在10 C大倍率下,容量约为100 mAh？g-1左右.
英文摘要：
The TiO2@MWNTs nanocomposites have been prepared by a simple one-step solvothermal method using low-cost TiOSO4 as the raw material in the presence of MWNTs.X-ray diffraction（XRD）,scan electron microscopy（SEM）,transmission electron microscopy（TEM）,nitrogen adsorption-desorption and thermogravimetric-differential scanning calorimeter（TG-DSC） analysis were performed to characterize the structures and morphologies of the TiO2@MWNTs composites.Their lithium storage properties were investigated with galvanostatic charge/discharge measurements when the composites was used as anode materials for lithium-ion batteries（LIBs）.The nitrogen adsorption-desorption curve and pore size distribution verified that the TiO2@MWNTs nanocomposites had rich hierarchical pores and large specific surface area.Compared with pristine TiO2,these TiO2@MWNTs nanocomposites exhibited much higher rate capability and even better capacity retention.The reversible capacity of the nanocomposites electrode is up to 200 mAh·g-1 and remain at 182 mAh·g-1 at 1 C after 100 cycles.The reversible capacity is about 100 mAh·g-1 even at the high rate of 10 C.
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