Performance improvement of air-cathode single-chamber microbial fuel cell using a mesoporous carbon
Performance improvement of air-cathode single-chamber microbial fuel cell using a mesoporous carbon
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DOI：
10.1016/j.jpowsour.2011.05.004
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
Yaping Zhang;Jian Sun;B. Hou;Yongyou Hu
中科院分区：
文献类型：
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作者：
Yaping Zhang;Jian Sun;B. Hou;Yongyou Hu
采用层层自组装法制备了一种新型的介孔炭（MC）改性炭纸，并将其用作空气阴极单室微生物燃料电池（MFC）的阳极。利用循环伏安法（CV）和电化学阻抗谱（EIS），我们已经证明了MC修饰电极表现出更有利和更稳定的电化学行为，如增加的活性表面积和提高的电子转移速率，比裸碳纸。采用MC改性碳纸阳极的MFC比采用裸碳纸阳极的MFC性能有显著提高：最大功率密度提高81%，启动时间缩短68%。循环伏安和交流阻抗分析表明，碳纸表面的MC膜提高了阳极生物膜的电化学活性，使电荷转移电阻从300 Ω降低到99 Ω。此外，阳极和阴极极化曲线显示阴极电位差异可以忽略不计，但阳极电位差异显著，表明MC改性阳极而非阴极对MFC性能的改善负有责任。在本文中，我们已经证明了利用MC改性碳纸，以提高MFC的性能。
A novel mesoporous carbon (MC) modified carbon paper has been constructed using layer-by-layer self-assembly method and is used as anode in an air-cathode single-chamber microbial fuel cell (MFC) for performance improvement. Using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), we have demonstrated that the MC modified electrode exhibits a more favorable and stable electrochemical behavior, such as increased active surface area and enhanced electron-transfer rate, than that of the bare carbon paper. The MFC equipped with MC modified carbon paper anode achieves considerably better performance than the one equipped with bare carbon paper anode: the maximum power density is 81% higher and the startup time is 68% shorter. CV and EIS analysis confirm that the MC layer coated on the carbon paper promotes the electrochemical activity of the anodic biofilm and decreases the charge transfer resistance from 300 to 99 Ω. In addition, the anode and cathode polarization curves reveal negligible difference in cathode potentials but significant difference in anode potentials, indicating that the MC modified anode other than the cathode was responsible for the performance improvement of MFC. In this paper, we have demonstrated the utilization of MC modified carbon paper to enhance the performance of MFC.