聚苯胺混杂型电化学电容器研究

Studies on Hybrid Electrochemical Capacitors Based on Polyaniline and Activated Carbon

采用聚苯胺在改性活性炭表面原位聚合方法,制备了聚苯胺活性炭复合物。研究了活性炭与苯胺在不同配比下制得的复合物的比容量,结果表明:当活性炭占复合材料的质量比为14.9%时,复合物的比容量为191.8F/g,比相同条件下制得聚苯胺的比容量提高了56%。以该复合物为电化学电容器的正极材料,以改性活性炭为其负极材料,电解液为6mol/L的氢氧化钠水溶液,组装了原型电化学电容器。该电容器的比能量可达8.7Wh/kg,比功率可达878W/kg。

Composite materials were fabricated by in-situ polymerization of aniline on activated carbon. Specific capacitance of the composite electrodes was tested by galvanostatic charge/discharge method. The results show that specific capacitance of the composite is about 191.8 F/g, which is 56% higher than that of polyaniline, when activated carbon is at 14.9% of the composite. Hybrid electrochemical capacitors were fabricated, which the composite as an anodic electrode, and activated carbon modified by CO2 as a cathodic electrode. Specific energy and specific power of the capacitors could reach 8.7 Wh/kg and 878W/kg in 6 mol/L NaOH aqueous solution respectively.