PANI/MWCNT复合材料电容性能研究

Study of capacitance performance of PANI/MWCNT composites

采用化学氧化法制备了聚苯胺(PANI)及聚苯胺/多壁碳纳米管复合材料(PANI/MWCNT),扫描电镜(SEM)、IR表征样品并利用循环伏安法、交流阻抗及恒流充放电测试研究其电容性能。结果表明,PANI/MWCNT电极在1 mol/L的H2SO4溶液中电容性能良好,在5 mA/cm2的电流密度下比电容为523 F/g。PANI/MWCNT电极较纯PANI电极有更好的大电流放电能力,50 mA/cm2下复合电极的比电容仍达490 F/g,容量仅衰减了6.31%,而PANI电极的容量则衰减了29.74%。交流阻抗证明,与纯PANI电极相比,PANI/MWCNT复合电极的电阻较低,且具有更为优越的功率性能。

Polyaniline/multi-walled carbon nanotubes（PANI/MWCNT） composites synthesized by chemical oxidation method were characterized physically by scanning electron microscopic（SEM） and IR.The capacitance perfor-mance of the materials was investigated by cyclic voltammetry,AC impedance spectroscopy and galvanostatic charge-discharge tests.The results show that the PANI/MWCNT electrode performs well in 1 mol/L H2SO4 solution,and the specific capacitance reaches 523 F/g at the current density of 5 mA/cm2.The composites electrode pos-sesses the better capability of high current than that of pure PANI electrode,the specific capacitance reaches 490 F/g and decays 6.31% at 50 mA/cm2,but the specific capacitance of PANI electrode decays 29.74%.AC impedance spectroscopy shows that,compared with pure PANI electrode,PANI/MWCNT composites electrode exhibits the lower resistance and more superior power performance.