A study on electrochemically enhanced electrode materials by shape and structure control for oxygen reduction reaction in polymer electrolyte membrane fuel cell

Abstract

In this dissertation, I investigate ways to improve the electrochemical performance and durability of polymer electrolyte fuel cells by controlling the structure and shape of electrode materials. I aim to clarify the relationship between the structure and morphology of the electrode and catalyst, and their electrochemical performance, and to explore theoretical and experimental approaches to utilizing this relationship. Through the use of patterning to control the structure of the electrode/electrolyte interface, doping to control the microstructure of core-shell catalysts, and the introduction of 2D-shaped catalysts, improvements in single cell performances are confirmed. The resulting improved structures are expected to contribute to the PEMFCs by enhancing the kinetics of the oxygen reduction reaction, improving durability, and reducing the use of precious metals. This study aims to provide useful insights into innovative electrode development for sustainable energy conversion in the next generation energy field, by contributing to our understanding of the relationship between the microstructure of electrode material and its electrochemical performance.