填料型微生物燃料电池产电特性的研究  

Electricity Generation Using the Packing-Type Microbial Fuel Cells

作　　者：梁鹏[1] 范明志[1] 曹效鑫[1] 黄霞[1] 黄正宏[2] 王诚[3] 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点实验室,北京100084 [2]清华大学新型炭材料研究室,北京100084 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《环境科学》2008年第2期512-517,共6页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2006AA062329);国家自然科学基金项目(20577027)

摘　　要：将石墨和碳毡作为阳极填料组装成填料型微生物燃料电池,其启动期在1 d左右,低于平板型微生物燃料电池的启动期.碳毡作为填料时,微生物燃料电池的最大产电功率密度为1502 mW/m2(37.6 W/m3),优于石墨作为填料的MFC.将碳毡与碳纸烧结一体以提高填料型微生物燃料电池阳极的导电性,与平板型微生物燃料电池相比,其面积内阻从0.071Ω.m2下降到0.051Ω.m2,最大电流密度从3000 mA上升到8000 mA,最大产电功率密度从1 100 mW/m2(27.5 W/m3)上升到2426 mW/m2(60.7W/m3),阳极电势平均下降100 mV.循环流量影响填料型微生物燃料电池的产电能力,当流量低于1 mL/min时,其产电功率密度随流速降低而下降.填料型微生物燃料电池在外电阻为600Ω下长期稳定运行30 d以上,其库仑效率约为10.6%.The packing-type microbial fuel cells （MFCs） were constructed using the granular graphite and the carbon felt as packing materials. The start-up time of the packing-type MFC was about 1 d, which was lower than that of the flat-type MFC. The maximal power density （ Pm ） of the MFC with carbon felt as packing material was 1 502 mW/m^2 （37.6 W/m^3 ）, which was higher than that with granular graphite as packing material. The carbon felt and carbon paper were sintered together to enhance the electric conductivity. Compared with the flat-type MFC, the area-speciflc resistance of the packing-type MFC decreased from 0.071 Ω· m^2 to 0.051 Ω ·m^2, the maximal current density increased from 3 000 mA to 8 000 mA, the Pm increased from 1 100 mW/m^2 （27.5 W/m^3） to 2 426 mW/m^2 （60.7 W/m^3） and the potentials of anode decreased about 100 mV. The flow rate affected the power generation of the MFC. When the flow rate was lower than 1 mL/min, the P.. dropped with the flux decreasing. The packing-type MFC was operated for over 30 and the coulomb efficiency was about 10.6% .

关 键 词：微生物燃料电池 填料 内阻 

分 类 号：X382[环境科学与工程—环境工程]