The use of double-sided cloth without diffusion layers as air-cathode in microbial fuel cells |
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Authors: | Jia LiuYujie Feng Xin WangXinxin Shi Qiao YangHe Lee Zhaohan ZhangNanqi Ren |
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Affiliation: | a State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China b MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China |
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Abstract: | The cost of electrode materials is one of the most important factors limiting the scale of microbial fuel cells (MFCs). In this study, a novel double-sided cloth (DC) without diffusion layer is using as air-cathode, which decreases the cost and simplifies electrode production process. Using Pt as catalyst, the maximum power density of MFC using DC cathode is 0.70 ± 0.02 W m−2, which is similar to that obtained using carbon cloth (CC) cathodes (0.66 ± 0.01 W m−2). After running in stable status, the Coulombic efficiencies (CEs) (18 ± 1%) and COD removal rates (75 ± 3%) are almost the same as those of CC cathode with diffusion layers. Using carbon powder as catalyst on the DC cathode, the maximum powder density is 0.41 ± 0.01 W m−2, with a COD removal rate of 66 ± 2% and a CE of 13.9 ± 0.5%. The total cost of cathode based on power output decreases as follows: CC with Pt (CC-Pt, 2652$ W−1), DC with Pt (DC-Pt, 1007$ W−1) and DC with carbon powder (DC-C, 22$ W−1), showing that DC is an inexpensive and promising cathode material for future applications. |
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Keywords: | Microbial fuel cells (MFCs) Double-sided cloth Diffusion layers Performance Cost |
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