An improved fabrication technique for conventional hot-pressed membrane electrode assemblies (MEAs) with carbon supported cobalt triethylenetetramine (CoTETA/C) as the cathode catalyst is investigated. The V–I results of PEM single cell tests show that addition of glycol to the cathode catalyst ink leads to significantly higher electrochemical performance and power density than the single cell prepared by the traditional method. SEM analysis shows that the MEAs prepared by the conventional hot-pressed method have cracks between the cathode catalyst layer and Nafion membrane, and the contact problem between cathode catalyst layer and Nafion membrane is greatly suppressed by addition of glycol to the cathode catalyst ink. Current density–voltage curve and impedance studies illuminate that the MEAs prepared by adding glycol to the cathode catalyst ink have a higher electrochemical surface area, lower cell ohmic resistance, and lower charge transfer resistance. The effects of CoTETA/C loading, Nafion content, and Pt loading are also studied. By optimizing the preparation parameters of the MEA, the as-fabricated cell with a Pt loading of 0.15 mg cm⁻² delivers a maximum power density of 181.1 mW cm⁻², and a power density of 126.2 mW cm⁻² at a voltage of 0.4 V.

研究了一种传统的以碳负载的三亚乙基四胺钴（CoTETA / C）作为阴极催化剂的热压膜电极组件（MEA）的改进制造技术。该V -我PEM单电池测试的结果表明，与传统方法制备的单电池相比，向阴极催化剂油墨中添加乙二醇可显着提高电化学性能和功率密度。SEM分析表明，通过常规的热压方法制备的MEA在阴极催化剂层和Nafion膜之间具有裂缝，并且通过向阴极催化剂油墨中添加二醇而大大抑制了阴极催化剂层与Nafion膜之间的接触问题。电流密度-电压曲线和阻抗研究表明，通过在阴极催化剂油墨中添加乙二醇制成的MEA具有较高的电化学表面积，较低的电池欧姆电阻和较低的电荷转移电阻。还研究了CoTETA / C负载，Nafion含量和Pt负载的影响。^-2在0.4 V的电压下提供181.1 mW cm ^-2的最大功率密度和126.2 mW cm ^-2的功率密度。