You Shi-Jie, Zhao Qing-Liang, Jiang Jun-Qiu
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2006 Nov;27(11):2159-63.
In air-cathode microbial fuel cell (ACMFC), oxygen diffused into the reactor from cathode without PEM can be reduced as electron acceptor via aerobic respiration by facultative microorganisms, resulting in either a decreasing of power generation or electron loss. In this study, ACMFC1 and ACMFC2 with different electrode configuration were compared to examine power density and electron recovery from glucose. The results showed that ACMFC1 generated a maximum power density of 3 070mW/m3 with internal resistance of 302.141 and anode potential of -323mV; while maximum power density of 9 800mW/m3 for ACMFC2 was obtained with internal resistance of 107.79omega and anode potential of -442mV. ACMFC2 could sustain generating electricity for nearly 220 h (ERE of 30.1%), comparing with ACMFC1 of less than 50 h (ERE of 9.78%) under batch operation. Therefore, an improved design for electrode configuration of ACMFC can be performed to generate higher power with low internal resistance, meanwhile, achieve increasing electron recovery simultaneously.
在空气阴极微生物燃料电池（ACMFC）中，无质子交换膜（PEM）时，氧气从阴极扩散到反应器中，可作为电子受体通过兼性微生物的有氧呼吸被还原，这会导致发电功率降低或电子损失。在本研究中，对具有不同电极配置的ACMFC1和ACMFC2进行了比较，以研究从葡萄糖中获得的功率密度和电子回收率。结果表明，ACMFC1的最大功率密度为3070mW/m³，内阻为302.14Ω，阳极电位为-323mV；而ACMFC2的最大功率密度为9800mW/m³，内阻为107.79Ω，阳极电位为-442mV。在分批操作下，ACMFC2可持续发电近220小时（电子回收率为30.1%），而ACMFC1则少于50小时（电子回收率为9.78%）。因此，可以对ACMFC的电极配置进行改进设计，以在低内阻的情况下产生更高的功率，同时实现电子回收率的提高。
