电极面积和电极间距对立方体型MFCs产电能力的影响  

Effects of the electrode area and electrode spacing on the electricity generation capacity of MFCs

作　　者：王艳芳[1] 刘百仓[1,2] 郑哲 郑雪艳[4] 

机构地区：[1]四川大学建筑与环境学院,四川成都610207 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [3]陕西建工集团第七建筑有限公司,陕西西安712000 [4]四川大学外国语学院,四川成都610207

出　　处：《可再生能源》2013年第8期68-74,共7页Renewable Energy Resources

基　　金：国家自然科学基金(51278317)

摘　　要：以生活污水为底物,普通石墨棒为电极,构建立方体型双室微生物燃料电池(MFCs),研究了阴、阳极电极面积和电极间距对MFCs产电能力的影响。试验结果表明:当阴极表面积作为唯一变量时,阴极表面积越大,电池的产电性能越好,当Acat∶AAn=5时MFC产电最佳;当阳极面积作为唯一变量,AAn∶Acat=0.41时,电池产电能力和运行效果最佳;减小电极间距能有效地减少内阻,同时有利于底物和生成物的流动传质;提高输出功率,电极间距为21 mm的装置产电能力和运行效果最佳。The technology of building the cube-type microbial fuel cells （MFCs） are based on the living sewage as substrate and ordinary graphite rod as electrode. The thesis studies the effects of the electrode area and electrode spacing on the electricity generation capacity of microbial fuel cells （MFCs）. The experimental results showed that： When taken as the only variable, the larger surface area of the cathode will lead to better electricity generation capacity. As well as Acat：AAn=5, the MFCs will possess the best electricity generation capacity; When the surface area of anode is the only variable and make AAn：Acat=0.41, the capacity and running effect will reach its optimal performance; Cutting down the electrode spacing will effectively reduce the eternal resistance, at the same time, in favor of the flow and mass-transfer of substrate and product, and improve output power. Furthermore, the device with 21 mm electrode spacing has the best electricity generation capacity and operation effect.

关 键 词：微生物燃料电池 阴极面积 阳极面积 电极间距 功率密度 

分 类 号：TM911.45[电气工程—电力电子与电力传动]