单室直接微生物燃料电池的阴极制作及构建  

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

作　　者：祝学远[1] 冯雅丽[1] 李少华[2] 李浩然[2] 杜竹玮[2] 罗小兵[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室

出　　处：《过程工程学报》2007年第3期594-597,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20476009)

摘　　要：在研制含铁离子阴极电极板的基础上,构建了单室直接微生物燃料电池.通过实验考察了单室无介体微生物燃料电池的产电规律及阴极板中铁离子含量对产电的影响.实验证明,单室直接微生物燃料电池是可行的,电能的输出主要依赖吸附在电极表面的细菌形成的生物膜,而与悬浮在溶液中的细菌及溶液中的其他物质基本无关.在单室无介体微生物燃料电池的阴极板中添加铁离子,通过铁离子在二价和三价间的循环转化,提高了电子的传递速率,加快了质子和氧气的反应,电池的输出功率达到14.58mW/m2.A new type of single-chamber direct microbial fuel cell was constructed successfully on the basis of studying the cathode electrode containing Fe^3＋. The electricity generation mechanism of the single-chamber microbial fuel cell and the effect of different Fe^3＋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 Fe^3＋-graphite cathode enhanced the oxidation-reduction efficiency. Electron transfer driving force was generated in coupling of Fe^3＋ reduction to Fe^2＋ on the cathode. The Fe^2＋ cations were subsequently oxidized by 02 in air. For this Fe^3＋ 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/m^2.

关 键 词：单室无介体微生物燃料电池 生物膜 阴极电极 铁离子循环转化 

分 类 号：TM911.45[电气工程—电力电子与电力传动]