(1. 合肥工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，合肥 230009； 2. 先進(jìn)功能材料與器件安徽省重點(diǎn)實(shí)驗(yàn)室，合肥 230009)
摘 要: 在陽(yáng)極氧化法制備有序TiO2納米管陣列(TiO2 NTAs)的基礎(chǔ)上，通過(guò)氣氛保護(hù)退火實(shí)現(xiàn)碳改性處理(C-TiO2 NTAs)，并進(jìn)一步采用水浴沉積工藝可控制備VO2/C-TiO2納米管復(fù)合陣列(VO2/C-TiO2 NTAs)。采用X射線衍射(XRD)、X射線光電子能譜(XPS)、場(chǎng)發(fā)射掃描電鏡(FESEM)和場(chǎng)發(fā)射透射電鏡(TEM)對(duì)VO2/C-TiO2 NTAs的物相、成分和形貌進(jìn)行表征，利用循環(huán)伏安(CV)、恒電流充放電(GCD)以及電化學(xué)阻抗譜(EIS)測(cè)試VO2/C-TiO2 NTAs的超電容性能。結(jié)果表明：在濃度為0.01 mol/L的VOSO4溶液中90 ℃沉積3 h，VO2/C-TiO2 NTAs的比電容最佳，當(dāng)電流密度為1 A/g、比電容為316 F/g，且經(jīng)過(guò)1000次恒電流循環(huán)充放電后，其電容保持率為82%。
關(guān)鍵字: VO2納米顆粒；TiO2納米管陣列；水浴沉積；超電容性能
（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
