二氧化锰-碳纤维复合结构的超级电容器电化学性能研究

Electrochemical property of supercapacitor with MnO_2-carbon fiber hybrid structure as electrodes

采用电化学沉积法将二氧化锰纳米片状结构沉积在碳纤维上,通过控制沉积时间控制MnO2在碳纤维上的包覆厚度。XRD结果表明,二氧化锰材料为ε-MnO2相;SEM形貌表明,二氧化锰成纳米片状结构均匀包覆在整个碳纤维表面上。将包覆有二氧化锰的碳纤维组装成超级电容,进行电化学研究,研究结果表明,电化学沉积时间的长短对电容的性能起到决定性作用,电沉积时间为20min的情况下,电容的综合性能最佳。

MnO2 nanonanoflakes were deposited on carbon fiber via a electrochemical deposition process. Through controlled the reaction time to changed the thickness of MnO2 on carbon fiber. The XRD result showed that the MnO2 were e-MnO2 phase,and the 8EM showed the MnO2 nanonanoflakes clad the carbon fiber uniformity. The Supercapacitor were assembled by MnO2-Carbon Fiber materials,the Electrochemical Properties results showed that the electrochemical de- posited time played a key role in capacitor,when the deposited time was 20min,the capacitor performance was the best.