微生物燃料电池聚苯胺膜阳极的制备及性能

 分别用恒电压法、脉冲极化法、循环伏安法制备聚苯胺(PANI)膜阳极,并应用于固定床微生物燃料电池(MFC),考察其产电及污水处理性能。结果表明,与恒电压法和脉冲极化法相比,循环伏安法制备的PANI 膜阳极导电性最好,且其电极电阻(3.65 Ω)与恒电压法制备的电极电阻(55.45 Ω)相比降低了51.8 Ω。循环伏安法制备的PANI 膜阳极应用于MFC,最大功率密度和开路电压分别为215.6 mW·m^-2和849.3 mV,比恒电压法制备的PANI 膜阳极MFC 最大功率密度和开路电压分别提高了50.6%和45.1%。与恒电压法和脉冲极化法相比,循环伏安法制备的PANI 膜阳极,可一定程度上缩短MFC 启动时间,增加电池产电稳定性,提高MFC 对污水有机物的去除率,为MFC 高性能阳极的制备提供了一种新途径。

Preparation and performance of PANI film anodes for MFC

The PANI film anodes are prepared by the potentiostatic method, the pulse polarization and the cyclic voltammetry (CV), and are applied in a fixed bed microbial fuel cell to investigate the performances of the electricity generation and the wastewater treatment, respectively. It is shown that the PANI film anode modified by the CV enjoys the best conductivity, as compared with those obtained by the potentiostatic method and the pulse polarization, and the electrode resistance is greatly decreased from 55.45 Ω of that prepared by the potentiostatic method to 3.65 Ω. The PANI film anode prepared by the CV is applied in the MFC, the maximum power density and the open circuit voltage reach 215.6 mW·m^-2 and 849.3 mV, respectively, 50.6% and 45.1% higher than those of the PANI film anode modified by the potentiostatic method. Compared with the potentiostatic method and the pulse polarization, with the CV being used to modify the PANI film anode, the MFC startup time can be shortened, the electrical stability increased and the sewage removal rate improved. It is a new way to prepare the high performance anode for the MFC.