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首页> 外文会议>11th fuel cell science, engineering, and technology conference 2013 >UNITIZED REGENERATIVE FUEL CELL PERFORMANCE USING POLYMER WICKS FOR PASSIVE WATER MANAGEMENT
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UNITIZED REGENERATIVE FUEL CELL PERFORMANCE USING POLYMER WICKS FOR PASSIVE WATER MANAGEMENT

机译：使用聚合物棉芯进行被动水管理的统一再生燃料电池性能

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摘要

Proton Exchange Membrane (PEM) fuel cells rely on effective internal water transport to provide stable performance. Many water management schemes require high heat, high pressure, or high flow rates-effectively introducing parasitic losses and reducing round-trip efficiency. In this work, a radial, non-recirculating, unitized regenerative fuel cell prototype with passive water transport is designed and tested. The cell features a 5 cm2 active area with 1.2 mm wide by 0.6 mm high gas flow channels. Porous polymer wicks are fabricated in the cathode side flow channels and coupled with a bulk water storage structure. The resulting wicks are 0.3 mm wide and 0.6 mm high. Discharge operating voltage measured during current control testing resulted in 1 V at open circuit, 0.8 V at 0.3 A·cm~(-2), and 0.2 V at 1 A·cm~(-2). Charge operating current density measured during voltage control testing resulted in 0.1 A·cm~(-2) at 1.5 V, 0.3 A·cm~(-2) at 1.6 V, and 0.8 A·cm~(-2) at 2 V. During the membrane electrode assembly (MEA) conditioning procedure, degradation in operating current density is seen over a 30-100 minute time span.
机译：质子交换膜（PEM）燃料电池依靠有效的内部水传输来提供稳定的性能。许多水管理计划需要高热量，高压力或高流速，从而有效地引入了寄生损失并降低了往返效率。在这项工作中，设计并测试了带有被动水传输的径向，非循环，组合式可再生燃料电池原型。样品池的有效面积为5平方厘米，具有1.2毫米宽乘0.6毫米高的气流通道。多孔聚合物芯被制造在阴极侧流动通道中，并与整体储水结构耦合。所得的灯芯宽0.3毫米，高0.6毫米。在电流控制测试期间测得的放电工作电压导致开路为1 V，0.3 A·cm〜（-2）为0.8 V，1 A·cm〜（-2）为0.2V。在电压控制测试期间测得的充电工作电流密度在1.5 V下为0.1 A·cm〜（-2），在1.6 V下为0.3 A·cm〜（-2），在2 V下为0.8 A·cm〜（-2）在膜电极组件（MEA）调节过程中，在30至100分钟的时间跨度中观察到工作电流密度降低。

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