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首页> 外文会议>NATO Advanced Study Institute on Mini-Micro Fuel Cells: Fundamentals and Applications; 20070722-0803; Cesme-Izmir(TK) >KINETICS AND KINETICALLY LIMITED PERFORMANCE IN PEMFCS AND DMFCS WITH STATE-OF-THE-ART CATALYSTS
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KINETICS AND KINETICALLY LIMITED PERFORMANCE IN PEMFCS AND DMFCS WITH STATE-OF-THE-ART CATALYSTS

机译：使用最新催化剂的PEMFC和DMFC中的动力学和动力学受限的性能

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摘要

Over the past 10 years, extensive R&D efforts to optimize H_2/air-fed proton exchange membrane fuel cell (PEMFC) performance resulted in power densities near 1 W/cm~2 at ≈0.6 V and much reduced MEA (membrane electrode assembly) platinum loadings of ≈0.45 mg_(Pt)/cm~(MEA)~2. These accomplishments were largely driven by the implementation of thin membranes (≈25 μm), highly conductive bipolar plate materials/coatings, and empirical improvements in electrode design. In order to close the remaining performance gap for automotive applications, it is critical to quantify the various voltage losses in state-of-the-art H_2/air MEAs, as this will enable more targeted future MEA materials and design development. Similarly, much progress has been made in materials and engineering design of direct methanol fuel cells (DMFCs), and it is instrumental to deconvolute materials related losses (catalyst activity and ohmic resistances) from mass-transport related losses. This analysis will again enable the determination of performance gains which can be made by either MEA materials or MEA design improvements.
机译：在过去的十年中，为优化H_2 /空气质子交换膜燃料电池（PEMFC）的性能而进行的大量研发工作导致在≈0.6V时功率密度接近1 W / cm〜2，并且大大减少了MEA（膜电极组件）铂负载约为0.45 mg_（Pt）/ cm〜（MEA）〜2。这些成就很大程度上是由薄膜（≈25μm），高导电性双极板材料/涂层的实施以及电极设计的经验改进所推动的。为了弥补汽车应用中仍然存在的性能差距，对最新的H_2 /空气MEA中的各种电压损耗进行量化至关重要，因为这将使将来的MEA材料和设计开发更具针对性。同样，直接甲醇燃料电池（DMFC）的材料和工程设计也取得了很大进步，这有助于使与材料相关的损失（催化剂活性和欧姆电阻）与与运输相关的损失反卷积。该分析将再次确定可以通过MEA材料或MEA设计改进实现的性能提升。

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