聚苯胺及其高温碳化对海底微生物燃料电池阴极电化学性能影响

Effect of Pyrolyzed Polyaniline Modified Cathode on the Electrochemical Performance of Marine Sediment Microbial Fuel Cells

利用苯胺(ANI)为前驱体,制备复合改性阴极PANI/ACFC和PANI/ACF,研究改性阴极电化学性能。结果表明PANI/ACFC和PANI/ACF阴极交换电流密度分别是空白样的4.2倍和157倍,达到1.905×10-5A/m2和7.122×10-4A/m2。MSMFCs最大功率密度达到150.54 mW/m2(PANI/ACFC)和205.92 mW/m2(PANI/ACF),较空白样提高3.2倍和4.3倍。MSMFCs阴极性能的提高可能与PANI作为电子转移中介体有关,并提出改性阴极表面电子消耗新途径。本研究结果可服务于MSMFCs阴极设计及其深海条件电池应用。

With aniline(ANI) as the precursor, the composite modified cathode PANI/ACFC and PANI/ACF were respectively prepared to investigate their electrochemical performances. The results show that the exchange current densities of the PANI/ACFC and PANI/ACF cathodes are 1.905×10-5A/m2 and 7.122×10-4 A/m2, 4.2 and 157 times of that of the blank cathode, respectively. The maximum power density of MSMFCs reaches 150.54 mW/m2(PANI/ACFC), and 205.92 mW/m2(PANI/ACF) respectively, 3.2 and 4.3 times of that of the blank sample. It is speculated that the improvement of MSMFCs performance could be attributed to the PANI as an electron transfer intermediary, and a new electron consumption pathway on the cathode surface is proposed. The research result would be applied in the cathode designing of MSMFCs in deep sea.