| 阳极内添加阳离子交换树脂提升辊压“三合一”膜电极MFC性能 |
| 摘要点击 3000 全文点击 1923 投稿时间：2015-04-27 修订日期：2015-07-08 |
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| 中文关键词 微生物燃料电池 "三合一"膜电极系统 离子迁移 阳离子交换树脂 欧姆内阻 |
| 英文关键词 microbial fuel cell membrane electrode assembly ionic migration cation exchange resin Ohmic resistance |
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| 中文摘要 |
| 阳极-隔膜-阴极的"三合一"膜电极结构能够最大程度减小阴阳极间距,提高微生物燃料电池(microbial fuel cell, MFC)的输出功率. 为进一步提高MFC性能,本研究使用非贵金属材料构建了辊压"三合一"膜电极系统,其欧姆内阻降低至3~5 Ω. 以乙酸钠为底物,MFC的最高功率密度达到446 mW ·m-2. 向阳极内添加固体小球(如聚苯乙烯球和玻璃微球)可在辊压过程中增加阳极表面和内部的大孔,强化电解液向阴极的传递从而使MFC的功率密度提升10%. 添加阳离子交换树脂能够进一步强化阳极内部的质子传递,提高阴极电位,从而将功率密度提升至543 mW ·m-2. 此外,阳极内添加阳离子交换树脂还可提高电池运行的稳定性和库仑效率. |
| 英文摘要 |
| The membrane electrode assembly (MEA) with an anode-membrane-cathode structure can reduce the distance between anode and cathode to improve the power of microbial fuel cells (MFCs). Here in order to further promote the performance of MFCs, a novel MEA was constructed by rolling-press method without noble metal material, and the Ohmic resistance decreased to 3-5 Ω. The maximum power density was 446 mW ·m-2 when acetate was used as the substrate. Solid spheres (like polystyrene balls and glass microspheres) were added into anode to enhance the transportation of electrolyte to cathode, resulting in a 10% increase in power density by producing macropores on and in the anode during rolling process. Cation exchange resin was added to accelerate the transportation of proton through the anode so that the power density further increased to 543 mW ·m-2. Meanwhile, the stability of cell voltage and Coulomb efficiency of MFC were both enhanced after the addition of cation exchange resin. |
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