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Impact of Membrane Types and Catalyst Layers Composition on Performance of Polymer Electrolyte Membrane Fuel Cells.
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-05-20 , DOI: 10.1002/open.202000089 Paritosh Kumar Mohanta 1 , Masuma Sultana Ripa 1 , Fabian Regnet 1 , Ludwig Jörissen 1
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-05-20 , DOI: 10.1002/open.202000089 Paritosh Kumar Mohanta 1 , Masuma Sultana Ripa 1 , Fabian Regnet 1 , Ludwig Jörissen 1
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Performance of a low temperature polymer electrolyte membrane fuel cell (PEMFC) is highly dependent on the kind of catalysts, catalyst supports, ionomer amount on the catalyst layers (CL), membrane types and operating conditions. In this work, we investigated the influence of membrane types and CL compositions on MEA performance. MEA performance increases under all practically relevant load conditions with reduction of the membrane thickness from 50 to 15 μm, however further decrease in membrane thickness from 15 to 10 μm leads to reduction in cell voltage at high current loads. A thick anode CL is found to be beneficial under wet operating conditions assuming more pore space is provided to accommodate liquid water, whereas under dry operating conditions, an intermediate thickness of the anode CL is beneficial. When studying the impact of catalyst layer thickness, too thin a catalyst layer again shows reduced performance due to increased ohmic resistance ruled out the performance of the MEAs which have identical Pt crystallite sizes on the cathode CLs i. e. the thinnest the cathode CL, the highest the voltage were achieved at a defined current load. Adaptation of the operating conditions is highly anticipated to achieve the highest MEA performance.
中文翻译：
膜类型和催化剂层组成对聚合物电解质膜燃料电池性能的影响。
低温聚合物电解质膜燃料电池（PEMFC）的性能高度依赖于催化剂的种类、催化剂载体、催化剂层（CL）上的离聚物量、膜类型和操作条件。在这项工作中，我们研究了膜类型和 CL 成分对 MEA 性能的影响。随着膜厚度从 50 μm 减小至 15 μm，MEA 性能在所有实际相关负载条件下均有所提高，但膜厚度从 15 μm 进一步减小至 10 μm 会导致高电流负载下电池电压降低。发现厚的阳极CL在湿操作条件下是有益的，假设提供更多的孔隙空间来容纳液态水，而在干操作条件下，阳极CL的中间厚度是有益的。在研究催化剂层厚度的影响时，由于欧姆电阻增加，太薄的催化剂层再次表现出性能降低，排除了阴极 CL 上具有相同 Pt 微晶尺寸的 MEA 的性能，即阴极 CL 最薄，阴极 CL 最高。电压是在定义的电流负载下实现的。人们高度期望通过调整操作条件来实现最高的 MEA 性能。
更新日期：2020-05-20
中文翻译：
膜类型和催化剂层组成对聚合物电解质膜燃料电池性能的影响。
低温聚合物电解质膜燃料电池（PEMFC）的性能高度依赖于催化剂的种类、催化剂载体、催化剂层（CL）上的离聚物量、膜类型和操作条件。在这项工作中，我们研究了膜类型和 CL 成分对 MEA 性能的影响。随着膜厚度从 50 μm 减小至 15 μm，MEA 性能在所有实际相关负载条件下均有所提高，但膜厚度从 15 μm 进一步减小至 10 μm 会导致高电流负载下电池电压降低。发现厚的阳极CL在湿操作条件下是有益的，假设提供更多的孔隙空间来容纳液态水，而在干操作条件下，阳极CL的中间厚度是有益的。在研究催化剂层厚度的影响时，由于欧姆电阻增加，太薄的催化剂层再次表现出性能降低，排除了阴极 CL 上具有相同 Pt 微晶尺寸的 MEA 的性能，即阴极 CL 最薄，阴极 CL 最高。电压是在定义的电流负载下实现的。人们高度期望通过调整操作条件来实现最高的 MEA 性能。
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