论文部分内容阅读
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.
Multiwalled carbon nanotubes / titanium dioxide nanocomposites (TiO2 @ MWNTs) were prepared by solvothermal method using TiOSO4 as a titanium source and multi-walled carbon nanotubes (MWNTs) as a support. XRD, SEM, TEM and N2 adsorption- The structures and morphologies of the synthesized products were characterized by means of TG-DSC, TG-DSC, etc. The lithium storage properties of TiO2 @ MWNTs nanocomposites were investigated by galvanostatic charge-discharge test. The N2 adsorption-desorption curves and pore size distribution curves confirmed that TiO2 @ MWNTs Multi-stage pore structure and large specific surface area.Electrochemical test results show that, compared with pure TiO2 particles, TiO2 @ MWNTs nanocomposites have better capacity retention and rate performance at 1 C rate, the composite material Has a reversible capacity of 200 mAh? G-1, with a capacity of 182 mAh? G-1 even after 100 cycles, with a capacity of about 100 mAh? G-1 even at 10 C magnification.