Polyaniline/RuO2 composite electrode prepared by coating thermal decomposition and electrochemistry polymerization procedures
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摘要: 通过涂覆热分解法并结合电化学聚合法制备得到聚苯胺(PANI)/RuO2电极材料。使用涂覆热分解法于260℃热处理3 h制备RuO2薄膜, 通过电化学聚合法将PANI粒子沉积在RuO2薄膜上, 并在80℃加热12 h。采用XRD分析PANI/RuO2复合物晶相, 采用SEM观察PANI/RuO2复合电极材料的形貌变化。利用循环伏安及恒流充放电测试了该复合电极的电化学性能。结果表明, PANI沉积时间为25 min, 该PANI/RuO2复合电极的最大电容量为9.72 F, 比电容为452 F·g-1, 充放电曲线体现了较低的电压降、等效串联电阻及良好的充放电性能。经1000次循环伏安后, 其比电容损失约为11%。Abstract: Polyaniline (PANI)/RuO2 composite electrodes were prepared by coating thermal decomposition and electrochemistry polymerization procedures. RuO2 film was synthesized by coating thermal decomposition method at 260℃ for 3 h, and PANI particles were deposited on RuO2 films and dried at 80℃ for 12 h. The formation of the amorphous phase of PANI/RuO2 composite was studied by XRD. Morphologic variations of the composite electrodes were established by SEM. Electrochemical performances of the composite electrodes were measured by cyclic voltammetry (CV) and galvanostatic charge-discharge. The results show that when the deposition time of PANI is 25 min, the maximum capacitance and the specific capacitance of PANI/RuO2 composite electrode is 9.72 F and 452 F·g-1 respectively. Charge-discharge curves of the composite electrodes illustrate low potential drops, internal resistances and good charge-discharge properties. Approximately 11% loss of capacitance is observed after 1000 CV cycles.
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