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构建了具有碳毡可渗透阳极的空气自呼吸微流体燃料电池,与阳极采用碳纸可渗透电极的空气自呼吸微流体燃料电池进行了对比,在酸性和碱性条件下分别测试了两种阳极的电化学性能以及电池性能,并在碱性条件下对电池内的传质与性能特性进行了实验研究.实验结果表明,无论是酸性还是碱性条件下,碳毡电极的电化学性能均优于碳纸;在酸性条件下,采用碳毡阳极的自呼吸微流体燃料电池的最高功率密度和极限电流密度分别是采用碳纸阳极的自呼吸微流体燃料电池的1.8倍和2.8倍;在碱性条件下,采用碳毡阳极电池的最高功率密度为35.1 mW/cm~2,极限电流密度为192.9 mA/cm~2,分别是采用碳纸阳极的自呼吸微流体燃料电池的5.2倍和7倍;与酸性条件相比,碱性条件下两种阳极的自呼吸微流体燃料电池的性能均较好;在碱性条件下,电池的性能随着燃料及电解液流量的提高而增加,而后保持不变,随着燃料浓度、电解液及支持电解液浓度的提高均呈现先增加后减小的趋势.
A self-breathing air-breathing microfluidic fuel cell with a carbon felt permeable anode was constructed and compared with an air-breathing breathing microfluidic fuel cell with a carbon paper permeable electrode at the anode. Two kinds of anodes were tested respectively under acidic and alkaline conditions Electrochemical performance and battery performance, and the mass transfer and performance characteristics of the battery under alkaline conditions were experimentally studied.The experimental results show that, in both acidic and alkaline conditions, the electrochemical performance of carbon felt electrode are excellent In carbon paper, under the acidic conditions, the highest power density and the ultimate current density of self-breathing microfluidic fuel cell with carbon felt anode were 1.8 times and 2.8 times that of self-breathing microfluidic fuel cell using carbon paper anode respectively. The maximum power density of carbon felt anode cells was 35.1 mW / cm ~ 2 and the ultimate current density was 192.9 mA / cm ~ 2, respectively, which were 5.2 times and 7 times higher than that of self-breathing microfluidic fuel cells using carbon paper anode The performance of self-breathing microfluidic fuel cells with both anodes under alkaline conditions was better than that under acidic conditions. Under alkaline conditions, the performance of the cells increased with the increase of fuel and electrolyte flow rates Plus, then remain unchanged, with the fuel concentration, electrolyte concentration and improve the supporting electrolyte showed a trend of first increasing and then decreasing.