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首页> 外文期刊>International Journal of Electrochemical Science >Microfluidic Direct Methanol Fuel Cell with Ladder-Shaped Microchannel for Decreased Methanol Crossover
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Microfluidic Direct Methanol Fuel Cell with Ladder-Shaped Microchannel for Decreased Methanol Crossover

机译：具有梯形微通道的微流直接甲醇燃料电池，可减少甲醇穿越

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摘要

In this work, the design and fabrication of a planar, glass- polydimethylsiloxane based microfluidicdirect methanol fuel cell with ladder-shaped microchannel are presented. The fuel cell operates in anacidic electrolyte and with methanol and H2O2 as fuel and oxidant, respectively. The novel ladder- shaped microchannel leads to a significant improvement in minimizing reactant crossover, which couldkeep the diffusive interface away from the opposite electrode. A three-dimensional diffusion- convection model is developed to investigate the behavior of the mixing zone and to extractappropriate cell parameters and operation conditions. The fluorescence experiments show that theladder-shaped microchannel structure leads to a decrease in width of the mixing zone. The proof-of- concept microfluidic direct methanol fuel cell with ladder-shaped microchannel is able to reach a-2 -1 maximum power density of 12.24 mW cm at a flow rate of 0.5mL min , which is ca. 35.3% higherthan that of a normal shaped microfluidic direct methanol fuel cell.
机译：在这项工作中，提出了具有梯形微通道的平面，玻璃-聚二甲基硅氧烷基微流控直接甲醇燃料电池的设计和制造。燃料电池在酸性电解液中运行，并分别以甲醇和H2O2作为燃料和氧化剂。新颖的梯形微通道在最大程度地减少反应物交叉方面带来了显着改进，这可以使扩散界面远离相对电极。建立了三维扩散对流模型，以研究混合区的行为并提取合适的电池参数和运行条件。荧光实验表明，梯形的微通道结构导致混合区宽度的减小。具有梯形微通道的概念验证微流直接甲醇燃料电池能够以0.5mL / min的流速达到12.24 mW cm的a-2 -1最大功率密度，约为0.5mL。比正常形状的微流直接甲醇燃料电池高35.3％。

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