阴极
阳极
电极
微生物燃料电池
材料科学
多孔性
内阻
电导率
分析化学(期刊)
化学工程
复合材料
化学
色谱法
功率(物理)
电池(电)
热力学
物理化学
工程类
物理
作者
Ruggero Rossi,Benjamin P. Cario,Carlo Santoro,Wulin Yang,Pascal E. Saikaly,Bruce E. Logan
标识
DOI:10.1021/acs.est.8b06004
摘要
Direct comparisons of microbial fuel cells based on maximum power densities are hindered by different reactor and electrode sizes, solution conductivities, and materials. We propose an alternative method here, the electrode potential slope (EPS) analysis, to enable quantitative comparisons based on anode and cathode area-based resistances and operating potentials. Using EPS analysis, the brush anode resistance (RAn = 10.6 ± 0.5 mΩ m2) was shown to be 28% lower than the resistance of a 70% porosity diffusion layer (70% DL) cathode (RCat = 14.8 ± 0.9 mΩ m2) and 24% lower than the solution resistance (RΩ = 14 mΩ m2) (acetate in a 50 mM phosphate buffer solution). Using a less porous cathode (30% DL) did not impact the cathode resistance but did reduce the cathode performance due to a lower operating potential. With low-conductivity domestic wastewater (RΩ = 87 mΩ m2), both electrodes had higher resistances [RAn = 75 ± 9 mΩ m2, and RCat = 54 ± 7 mΩ m2 (70% DL)]. Our analysis of the literature using EPS analysis shows how electrode resistances can easily be quantified to compare system performance when the electrode distances are changed or the sizes of the electrodes are different.
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