Abstract：A new type of single-chamber direct microbial fuel cell was constructed successfully on the basis of studying the cathode electrode containing Fe3+. The electricity generation mechanism of the single-chamber microbial fuel cell and the effect of different Fe3+contents on cell voltage in the cathode electrode were studied through experiments. By analyzing the cell voltage measured by the acquisition system, it is proved that the single-chamber direct microbial fuel cell is feasible, microbial electricity generation is mainly attributed to the electrochemically and biologically active cells attached to the electrode. The use of an Fe3+-graphite cathode enhanced the oxidation-reduction efficiency. Electron transfer driving force was generated in coupling of Fe3+ reduction to Fe2+ on the cathode. The Fe2+ cations were subsequently oxidized by O2 in air. For this Fe3+ circular effect, the electron transfer and oxidation-reduction efficiency were enhanced. The power density of the single direct microbial fuel cell was up to 14.58 mW/m2.
祝学远;冯雅丽;李少华;李浩然;杜竹玮;罗小兵. 单室直接微生物燃料电池的阴极制作及构建[J]. , 2007, 7(3): 594-597.
ZHU Xue-yuan;FENG Ya-li;LI Shao-hua;LI Hao-ran;DU Zhu-wei;LUO Xiao-bing. Construction of a Single-chamber Direct Microbial Fuel Cell and Preparation of Cathode Electrode. , 2007, 7(3): 594-597.