Preparation and electrochemical properties of RuO₂/polyaniline electrodes for supercapacitors

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• 作者：Xiang Li ; ^{lxkmust@163.com} ; Weiping Gan ; Feng Zheng ; Lulu Li ; Nina Zhu ; Xiaoqing Huang
• 关键词：Polyaniline ; RuO2 ; Electrodeposition ; Specific capacitance ; Supercapacitor
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：July, 2012
• 卷：162
• 期：11-12
• 页码：953-957
• 文件大小：1130 K

摘要

RuO₂ embedded polyaniline electrodes were prepared by electrodeposition. PANI electrode was electrochemically deposited on tantalum sheet. Then RuO₂ particles were embedded on film layer of polyaniline. RuO₂/polyaniline electrode was annealed at 80 掳C for 12 h. Microstructure and morphology of RuO₂/polyaniline were characterized using X-ray diffraction, infrared spectrometer and scanning electron microscopy. Structure of the composite with amorphous phase was verified by X-ray diffraction. Fourier transform infrared spectroscopy results confirmed that counter ion had been incorporated into PPy matrix. Analysis by scanning electron microscopy revealed that during grain growth of RuO₂/PANI, due to its porous morphology, PANI provides a large surface to the growing RuO₂. The electrochemical performances of RuO₂/polyaniline electrode are calculated using cyclic voltammetry and electrochemical impedance spectroscopy technology. RuO₂/polyaniline electrode reveals high specific capacitance (474 F g^鈭?), ideal cyclical stability and smaller charge transfer resistance (2.24 惟). The good property for RuO₂/polyaniline electrode is due to fine RuO₂ particles embedded in the PANI of big surface area.