RuO2／聚吡咯复合电极的制备及性能

摘要

RuO2/PPy composite electrodes were prepared by thermal decomposition oxidation and electrochemical polymerization. RuO2 film was synthesized by coating thermal decomposition method at 260℃ for 3h, and PPy particles were deposited on RuO2 films by electrochemical polymerization. The structural analysis from XRD patters presents the formation of RuO2 in amorphous phase. IR spectroscopy results confirmed that the counter ion had been incorporated into composite. SEM showed the growth mechanism of PPy particles. The electro- chemical performance of composite electrode was test by cyclic voltammetry and galvanostatic charge and dis- charge. As deposition time was less than 25min, capacitance of composite electrode increases with increase of deposition time. While deposition time is more than 25min, capacitance of composite electrode decreases with increase of deposition time. Specific capacitance of composite electrode decreases with increase of deposition time. Specific capacitance of 471F/g was obtained as deposition time of composite electrode reaches 25 rain. The cycling stability of RuO2/PPy electrodes is ideal.%通过热分解法及电化学聚合法的复合工艺制备了RuO2／聚吡咯（PPy）电极材料。使用涂覆热分解法于260℃热处理3h制备得RuO2薄膜，通过电化学聚合法把PPy粒子沉积在RuO2薄膜上。XRD表明该复合物为非晶相；红外光谱测试揭示了相对应离子结合在复合物中；SEM揭示了PPy粒子的增长规律。循环伏安及恒流充放电测试了该复合电极的电化学性能。沉积时间〈25min时，复合电极的电容量与沉积时间呈递增关系；沉积时间〉25min时，复合电极的电容量与沉积时间呈递减关系。复合电极的比电容则随沉积时间的增加而减小。沉积时间为25min时，其比电容为471F／g。RuO2／PPy电极循环稳定性较好。