Power Generation and Electrochemical Analysis of Biocathode Microbial Fuel Cell Using Graphite Fibre Brush as Cathode Material
Power Generation and Electrochemical Analysis of Biocathode Microbial Fuel Cell Using Graphite Fibre Brush as Cathode Material
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DOI：
10.1002/fuce.200900023
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发表时间：
2009-10
期刊：
影响因子：
2.8
通讯作者：
S. You;Ning Ren;Qingliang Zhao;J. Wang;Fan Yang
中科院分区：
文献类型：
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作者：
S. You;Ning Ren;Qingliang Zhao;J. Wang;Fan Yang
为了提高微生物燃料电池（MFC）的阴极效率和可持续性，研究了石墨纤维刷（GFB）作为生物催化-阴极MFC发电的正极材料。在产电细菌混合培养133 h后，MFC可以在外部电阻（REX）为100 Ω时产生0.4 V的可再生电压。在电流密度为178.6 a m-3时，获得了68.4 W m-3的最大体积功率密度。电化学阻抗谱（EIS）分析表明，好氧接种具有电化学活性的细菌后，阴极的电荷转移电阻从188降低到17 Ω。对不同正极材料的对比研究表明，生物催化的GFB在半电池极化、功率和库仑效率（CE）方面比其他测试材料具有更好的性能。此外，还观察到阳极和阴极电解质的pH偏差。本研究展示了GFB作为MFC的生物阴极材料，可以更有效和可持续地从有机物质中回收电力。
To improve cathodic efficiency and sustainability of microbial fuel cell (MFC), graphite fibre brush (GFB) was examined as cathode material for power production in biocatalysed‐cathode MFC. Following 133‐h mixed culturing of electricity‐producing bacteria, the MFC could generate a reproducible voltage of 0.4 V at external resistance (REX) of 100 Ω. Maximum volumetric power density of 68.4 W m–3 was obtained at a current density of 178.6 A m–3. Upon aerobic inoculation of electrochemically active bacteria, charge transfer resistance of the cathode was decreased from 188 to 17 Ω as indicated by electrochemical impedance spectroscopy (EIS) analysis. Comparing investigations of different cathode materials demonstrated that biocatalysed GFB had better performance in terms of half‐cell polarisation, power and Coulombic efficiency (CE) over other tested materials. Additionally, pH deviation of electrolyte in anode and cathode was also observed. This study provides a demonstration of GFB used as biocathode material in MFC for more efficient and sustainable electricity recovery from organic substances.