›› 2007, Vol. 7 ›› Issue (3): 594-597.

• 生化工程专栏 •

单室直接微生物燃料电池的阴极制作及构建

1. 北京科技大学土木与环境工程学院
• 出版日期:2007-06-20 发布日期:2007-06-20

Construction of a Single-chamber Direct Microbial Fuel Cell and Preparation of Cathode Electrode

ZHU Xue-yuan,FENG Ya-li,LI Shao-hua,LI Hao-ran,DU Zhu-wei,LUO Xiao-bing

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing
• Online:2007-06-20 Published:2007-06-20

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.