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首页> 外文期刊>International Journal of Electrochemical Science >Effects of Catalyst Layer and Gas Diffusion Layer Thickness on the Performance of Activated Carbon Air-cathode for Microbial Fuel Cells
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Effects of Catalyst Layer and Gas Diffusion Layer Thickness on the Performance of Activated Carbon Air-cathode for Microbial Fuel Cells

机译：催化剂层和气体扩散层厚度对微生物燃料电池活性炭空气阴极性能的影响

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摘要

There are three key species to transport in AC air-cathodes, including O2, H2O and OH . The thicknessof GDL could be an apparent and easy-controlled parameter to optimize the O2 transport while the- thickness of CLs is important to the transport of not only O2 but also H2O and OH . In terms ofmaximum power density, the optimal thickness of CL was 0.2 mm with the highest power density of-2 2348 80 mWm obtained using 0.3 mm of GDL. According to the correlation analysis, thethickness of CL (Pearson correlation coefficient of 0.709) played a more important role than that ofGDL (Pearson correlation coefficient of 0.542) on the exchange current density and the maximumpower density. The thickness of GDL was mainly related to the charge transfer resistance whichaccounted for 497% of the total internal resistance. The correlation analysis also showed that thetotal thickness of air-cathode had a significant correlation to the exchange current density. Thethickness of CL was more significant than GDL on the exchange current density and maximum powerdensity with the optimal thickness of 0.2 mm. The thickness of GDL was mainly related to the chargetransfer resistance.
机译：在AC空气阴极中有3种关键物质要运输，包括O2，H2O和OH。 GDL的厚度可能是一个明显且易于控制的参数，可优化O2的传输，而CL的厚度不仅对O2的传输也很重要，对H2O和OH的传输也很重要。就最大功率密度而言，CL的最佳厚度为0.2 mm，使用0.3 mm的GDL获得的最大功率密度为2 2348 80 mWm。根据相关分析，在交流电流密度和最大功率密度上，CL的厚度（皮尔逊相关系数为0.709）比GDL的皮尔逊相关系数为0.542更为重要。 GDL的厚度主要与电荷转移电阻有关，占总内阻的497％。相关分析还表明，空气阴极的总厚度与交换电流密度具有显着的相关性。 CL的厚度在交流电流密度和最大功率密度（最佳厚度为0.2 mm）方面比GDL更为显着。 GDL的厚度主要与电荷转移电阻有关。

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