| 2种不同结构的微生物燃料电池的产电性能比较 |
| 摘要点击 2443 全文点击 1735 投稿时间：2008-01-30 修订日期：2008-06-30 |
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| 中文关键词 微生物燃料电池 产电性能 功率密度 内阻 |
| 英文关键词 microbial fuel cell power generation power density internal resistance |
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| 中文摘要 |
| 微生物燃料电池（microbial fuel cell，MFC）目前仍面临着产能低和成本高的问题，因此系统比较同样条件下不同结构MFC的产电性能对于最终提高其产电效率具有重要意义.通过构建2种不同结构的MFC反应器：单室型MFC和双室型MFC，以乙酸为燃料，固定外电阻为1 000 Ω，对其产电性能进行了比较研究.结果表明，单室型MFC和双室型MFC均可稳定地输出电能，平均最大输出电压分别为600 mV和650 mV，平均运行周期分别为110 h和90 h；单室型MFC和双室型MFC的最大面积功率密度分别为113.8 mW/m2和382.4 mW/m2，最大体积功率密度分别为1.3 mW/m3和2.2 mW/m3；根据稳态放电法确定双室型MFC的内阻为188 Ω，单室型MFC的内阻为348 Ω，双室型MFC的产电性能及运行稳定性均优于单室型MFC.阳极的面积和质子通道的大小都会对MFC的库仑效率产生影响. |
| 英文摘要 |
| Low electricity productivity and high cost are two problems facing the development of microbial fuel cell (MFC).Comparative studies on electricity generation in MFCs of different designs while under the same conditions are important in enhancing the power output. Single-chamber MFC and dual-chamber MFC were constructed and acetate was used as the fuel. Power outputs in these MFC were compared side by side with a resistance of 1 000 Ω connected to each. Experimental results showed that the electricity was generated continuously and steadily in the MFCs. The average maximum output voltages obtained by the single-chamber and dual-chamber MFCs were 600 and 650 mV，respectively. The electric cycles were operated for 110 and 90 h for the single-chamber and dual-chamber MFCs，respectively. From the single-chamber and dual-chamber MFCs，the maximum area power densities were 113.8 and 382.4 mW/m2 respectively，and the maximum volumetric power densities were 1.3 and 2.2 mW/m3 respectively. The internal resistances of single-chamber and dual-chamber MFC were 188 and 348 Ω，respectively. Results indicated that the dual-chamber MFC had a better performance than the single-chamber MFC. The effective area of anode and the proton exchange membrane had a significant effect on the performance of MFCs. |
