Effect of bamboo charcoal filler on the performance of microbial fuel cell

微生物燃料电池（MFC）的阳极对提高MFC产电性能有至关重要的影响.利用竹炭比表面积大、吸附能力强等特性,将其作为“三合一”膜电极MFC的阳极填充材料,通过增大阳极比表面积来提高其产电能力.实验结果表明,加入竹炭至阳极室后,MFC最高输出电压（外接电阻1 000Ω时）由0.280V增大到0.387V,提高了38.2％,并且输出电压更加稳定;而最大功率密度也由原来的0.22 W/m3增大到1.42 W/m3,同时内阻降低了80.85％（由235 Ω降为45 Ω）;库仑效率由15.0％增大到25.6％.说明MF℃阳极室填充竹炭可以显著促进MFC的产电性能.

The characteristic of anode is the key factor for impro- ving the electrogenesis capacity of microbial fuel cell （MFC）. In this paper, the bamboo charcoal was used as the filling ma- terial of anode chamber of a single-chamber MFC for its large surface area and strong absorption capacity. The power out- put capacities of MFCs with and without filling the bamboo charcoal were investigated. The results showed that the maxi- mum output voltage was enhanced by 38.2% from 0. 280 V to 0. 387 V after adding bamboo charcoal and the stability of the output voltage was also improved. The power density of the MFC filled with the bamboo charcoal （1.42 W/m3） was much higher than that without the filling material （0. 22 W/m3 ）. The internal resistance was decreased by 80. 85% from 235 gl to 45 fl,and the coulombic efficiency （CE） was also increased from 15.0% to 25.6%. It could be concluded that the electrogenesis capacity of MFC was enhanced signifi- cantly by filling bamboo charcoal as the filling material in the anode chamber of MFC.