Choi Mihwa, Kim Jong Kwan, Kim Jungsuk, Yang Seugran, Park Ji-Eun, Kim Ok-Hee, Cho Yong-Hun
Creative Future Laboratory, Korea Electric Power Corporation (KEPCO) Research Institute Daejeon 34056 South Korea.
Department of Chemistry, Sogang University Seoul 04107 South Korea.
RSC Adv. 2018 Oct 25;8(63):36313-36322. doi: 10.1039/c8ra07754a. eCollection 2018 Oct 22.
The large-area membrane-electrode assembly (MEA) has been fabricated using the decal transfer method with a methanol (MeOH)-based PtRu/C catalyst slurry. The stability of slurry dispersion is important when using a large-area decal transfer method to ensure the integrity of the electrode. In order to prepare stable and well dispersed catalyst slurry, a suitable solvent for the PtRu/C catalyst should be selected. We considered the physical properties of various organic solvents, including ionomer solubility, dielectric constant, and catalyst particle surface physical properties. We found that the MeOH-based PtRu/C slurry dispersion showed the best stability and dispersibility of catalyst-ionomer agglomerates. It was also confirmed that the MeOH-based slurry has the most suitable characteristics for coating the slurry on the substrate film. The decal technique-based MEA using this slurry showed excellent performance when compared with the spray method-based MEA. Furthermore, the large-area PtRu/C MEA with an active area of 51.84 cm was fabricated and excellent performance was realized even when a reforming gas was used.
采用基于甲醇（MeOH）的PtRu/C催化剂浆料，通过转印法制备了大面积膜电极组件（MEA）。在使用大面积转印法时，浆料分散的稳定性对于确保电极的完整性很重要。为了制备稳定且分散良好的催化剂浆料，应选择适合PtRu/C催化剂的溶剂。我们考虑了各种有机溶剂的物理性质，包括离聚物溶解度、介电常数和催化剂颗粒表面物理性质。我们发现，基于MeOH的PtRu/C浆料分散体在催化剂 - 离聚物团聚体方面表现出最佳的稳定性和分散性。还证实，基于MeOH的浆料具有将浆料涂覆在基底膜上的最合适特性。与基于喷涂法的MEA相比，使用这种浆料的基于转印技术的MEA表现出优异的性能。此外，制备了有效面积为51.84平方厘米的大面积PtRu/C MEA，即使使用重整气也实现了优异的性能。
