碳毡可渗透阳极空气自呼吸微流体燃料电池性能

发布时间：2018-04-02 15:06

本文选题：多孔可渗透电极　切入点：微流体燃料电池　出处：《科学通报》2017年33期

【摘要】：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.
[Abstract]:An air self-breathing microfluid fuel cell with carbon felt permeable anode was constructed and compared with that with carbon paper permeable electrode.The electrochemical performance and battery performance of the two kinds of anode were measured under acidic and alkaline conditions, and the mass transfer and performance characteristics in the battery were studied experimentally under the alkaline condition.The experimental results show that the electrochemical performance of carbon felt electrode is superior to that of carbon paper under acidic or alkaline conditions, and the electrochemical performance of carbon felt electrode is better than that of carbon paper in acid condition.The maximum power density and limit current density of the self-breathing microfluid fuel cell using carbon felt anode are 1.8 and 2.8 times higher than those of the self-breathing microfluid fuel cell using carbon paper anode, respectively.The maximum power density of carbon felt anode cell is 35.1 MW / cm ~ (-2), and the limit current density is 192.9 Ma / cm ~ (2), which is 5.2 times and 7 times of that of self-breathing micro-fluid fuel cell using carbon paper anode respectively.In alkaline condition, the self-breathing micro-fluid fuel cells have better performance, while in alkaline conditions, the performance of the cells increases with the increase of fuel and electrolyte flow rate, and then remains unchanged with the fuel concentration.The concentration of electrolyte and support electrolyte increased first and then decreased.
【作者单位】：重庆大学低品位能源利用及系统教育部重点实验室;重庆大学工程热物理研究所;酒泉卫星发射中心;
【基金】：国家自然科学基金(51376203)、国家自然科学基金重点国际(地区)合作研究项目(51620105011)资助国家杰出青年科学基金(51325602)
【分类号】：TM911.4

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