Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.069
Publication date: 18th July 2023
Surface modification using nanoparticles has been widely applied to enhance catalytic activity and stability of the oxygen electrode in solid oxide electrochemical cells, whereas there is still a long way to go for preparing uniform and scalable nanoparticles. Herein, an ultrasonic spray infiltration technique was introduced to produce electrocatalytically reactive nano-sized ceria or double perovskite oxide decorated oxygen electrodes. The uniform nano-sized infiltrates prepared improved oxygen catalytic activity by increasing oxygen vacancies and enlarging reaction sites on the electrode surface. The solid oxide electrochemical cells with tailored oxygen electrodes revealed a performance enhancement during reversible operation in fuel cell and electrolysis cell modes. In addition, ultrasonic spray infiltration-based nanoparticles were applied to a large-area cell (100 cm2), which indicated increased power output and stable performance for long-term operation. Thus, this study proved a scalable and feasible method to tailor bifunctional oxygen electrodes using uniform infiltrates for solid oxide electrochemical cells.
This work was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the government (Ministry of Science and ICT) of the Republic of Korea (NRF-2022M3J1A1065570) and Korea Institute of Energy Technology Evaluation and Planning (KETEP) for Renewable Energy Core Technology Development Project (20223030030090).
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