Electrode structure improvement is one of the most promising paths for improving the durability of polymer electrolyte membrane fuel cells (PEMFCs). As strategies to prevent structural deformation and enhance the durability of membrane electrode assemblies (MEAs) with structurally ordered PtCo/C-based cathodes, we evaluated the effect of hot pressing and reinforcing the electrode's structure by increasing the ionomer content. Even though the initial performances of the hot-pressed MEA (HP) and the MEA with extra cathode ionomer (EI) were lower than that of the conventional MEA (CE) by 13.6% and 19.1%, respectively, CE degraded much more significantly than HP and EI after an accelerated degradation test. Therefore, HP and EI could deliver significantly higher single cell performances than CE (22.7% and 43.7%, respectively). The improvements in the durability of HP and EI could be correlated with the structural stability which could be evaluated by structure and electrochemical analysis including electrochemical impedance spectroscopy.
Bibliographical noteFunding Information:
This study was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation of Korea (NRF) funded by the Korean Government ( Ministry of Science and ICT (MSIT) ) ( NRF-2015M1A2A2056554 ), the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government ( MSIT ) (No. 2019M3E6A1063674 ), and the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Trade, Industry & Energy (MOTIE) , Republic of Korea (No. 20173010032080 and No. 20173010032210 ). This study was also financially supported by the Institutional Project of Korean Institute of Science and Technology (KIST) .
© 2020 Hydrogen Energy Publications LLC
- Carbon supported ordered PtCo electrocatalyst
- Electrode structure reinforcement
- Hot press
- Polymer electrolyte membrane fuel cell
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology