Increased sustainable electricity generation in up-flow air-cathode microbial fuel cells.
Increased sustainable electricity generation in up-flow air-cathode microbial fuel cells.
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DOI：
10.1016/j.bios.2007.10.010
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发表时间：
2008-02
影响因子：
12.6
通讯作者：
S. You;Qingliang Zhao;Jin-na Zhang;Hong Liu;Junqiu Jiang;Shiqi Zhao
中科院分区：
文献类型：
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作者：
S. You;Qingliang Zhao;Jin-na Zhang;Hong Liu;Junqiu Jiang;Shiqi Zhao
以葡萄糖为原料，采用碳布为阴极、碳颗粒为阳极的上流式空气阴极微生物燃料电池（MFC）进行了可持续发电研究。使用塑料筛而不是膜来分离阳极和阴极。以1g/l葡萄糖为底物，筛面积为30 cm ~ 2的MFC的最大体积功率密度为25± 4 W/m3（89 A/m3），筛面积为60 cm ~ 2的MFC的最大体积功率密度为49± 3 W/m3（215 A/m3）。电化学阻抗谱分析表明，筛孔面积越大，功率密度越高，主要是由于筛孔内电阻减小。筛面积从30 cm ~ 2增加到60 cm ~ 2，总内阻从41Ω降低到27.5Ω，欧姆电阻从24.3Ω降低到14Ω。在低底物浓度下，增加操作循环比（RR）可以降低内阻，提高功率输出，但在高底物浓度下，RR对电池性能的影响可以忽略不计。
Sustainable electricity was generated from glucose in up-flow air-cathode microbial fuel cells (MFCs) with carbon cloth cathode and carbon granular anode. Plastic sieves rather than membrane were used to separate the anode and cathode. Based on 1g/l glucose as substrate, a maximum volumetric power density of 25±4W/m3(89A/m3) was obtained for the MFC with a sieve area of 30cm2and 49±3W/m3(215A/m3) for the MFC with a sieve area of 60cm2. The increased power density with larger sieve area was mainly due to the decrease of internal resistance according to the electrochemistry impedance spectroscopy analysis. Increasing the sieve area from 30cm2to 60cm2resulted in a decrease of overall internal resistance from 41Ω to 27.5Ω and a decrease of ohmic resistance from 24.3Ω to 14Ω. While increasing operational recirculation ratio (RR) decreased internal resistance and increased power output at low substrate concentration, the effect of RR on cell performance was negligible at higher substrate concentration.