| 填料型微生物燃料电池产电特性的研究 |
| 摘要点击 1966 全文点击 1146 投稿时间：2007-03-31 修订日期：2007-06-12 |
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| 中文关键词 微生物燃料电池 填料 内阻 |
| 英文关键词 microbial fuel cell packing materials internal resistance |
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| 中文摘要 |
| 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1 502 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0.071 Ω·m2下降到0.051 Ω·m2，最大电流密度从3 000 mA上升到8 000 mA，最大产电功率密度从1 100 mW/m2（27.5 W/m3）上升到2 426 mW/m2（60.7 W/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600 Ω下长期稳定运行30 d以上，其库仑效率约为10.6％. |
| 英文摘要 |
| 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/m2 (37.6 W/m3), 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-specific resistance of the packing-type MFC decreased from 0.071 Ω·m2 to 0.051 Ω·m2, the maximal current density increased from 3 000 mA to 8 000 mA, the pm increased from 1 100 mW/m2 (27.5 W/m3) to 2 426 mW/m2 (60.7 W/m3) 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 pm dropped with the flux decreasing. The packing-type MFC was operated for over 30 and the coulomb efficiency was about 10.6%. |
