(1. 合肥工业大学 材料科学与工程学院，合肥 230009； 2. 先进功能材料与器件安徽省重点实验室，合肥 230009)
摘 要: 在阳极氧化法制备有序TiO2纳米管阵列(TiO2 NTAs)的基础上，通过气氛保护退火实现碳改性处理(C-TiO2 NTAs)，并进一步采用水浴沉积工艺可控制备VO2/C-TiO2纳米管复合阵列(VO2/C-TiO2 NTAs)。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、场发射扫描电镜(FESEM)和场发射透射电镜(TEM)对VO2/C-TiO2 NTAs的物相、成分和形貌进行表征，利用循环伏安(CV)、恒电流充放电(GCD)以及电化学阻抗谱(EIS)测试VO2/C-TiO2 NTAs的超电容性能。结果表明：在浓度为0.01 mol/L的VOSO4溶液中90 ℃沉积3 h，VO2/C-TiO2 NTAs的比电容最佳，当电流密度为1 A/g、比电容为316 F/g，且经过1000次恒电流循环充放电后，其电容保持率为82%。
关键字: VO2纳米颗粒；TiO2纳米管阵列；水浴沉积；超电容性能
（1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; 2. Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei 230009, China）
Abstract:On the basis of ordered TiO2 nanotube arrays (TiO2 NTAs) prepared by an electrochemical anodization process, the C modified TiO2 nanotube arrays (C-TiO2 NTAs) were fabricated by annealing in protective atmosphere and VO2/C-TiO2 nanotube composite arrays (VO2/C-TiO2 NTAs) were obtained via water bath deposition process. The phase, composition and morphology of VO2/C-TiO2 NTAs were characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). And the supercapacitive performances of VO2/C-TiO2 NTAs were investigated by the cyclic voltammetry (CV), galvanostatic charge discharge tests (GCD) and electrochemical impedance spectroscopy (EIS). The results indicate that VO2/C-TiO2 NTAs obtained under 90 ℃ with the deposition time of 3 h in 0.01 mol/L VOSO4 solution exhibits the best performance, the specific capacitance reaches 316 F/g at current density of 1 A/g, and the initial capacitance of 82% can also be maintained after 1000 galvanostatic charge discharge cycles.
Key words: VO2 nanoparticles; TiO2 nanotube arrays; water bath deposition; supercapacitive performance
