Infiltration of Nanocatalysts for Solid Oxide Fuel Cells
Kyung Joong Yoon a
a Korea Institute of Science and Technology, Seoul, Korea
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
#GreenE - Advances in Green Energy Carriers
València, Spain, 2023 March 6th - 10th
Organizers: Taeseup Song and Ungyu Paik
Invited Speaker, Kyung Joong Yoon, presentation 324
Publication date: 22nd December 2022

Solid oxide regenerative fuel cells (SORFCs), which perform the dual functions of power generation and energy storage at high temperatures, offer one of the most efficient and environmentally friendly options for future energy management systems. Although the functionality of SORFC electrodes could be significantly improved by reducing the feature size of electrode to nanoscale, the practical use of nanomaterials has been limited due to the lack of stability and controllability at high temperatures. Herein, we demonstrate an advanced infiltration technique that allows nanoscale control of highly active and stable catalysts at elevated temperatures. Homogeneous precipitation in chemical solution, which is induced by urea decomposition, allows the precise tailoring of the phase purity and geometric properties. Particularly, effective complexing followed by instantaneous precipitation enables the atomic-scale dispersion of active catalysts on support. Controlling the key characteristics of nanocatalysts yields an electrode that is very close to the ideal electrode structure. Consequently, outstanding performance and durability are demonstrated in both fuel cell and electrolysis modes [1, 2].

References

[1] K.J. Yoon, M. Biswas, H.-J. Kim, M. Park, J. Hong, H. Kim, J.-W. Son, J.-H. Lee, B.-K. Kim, H.-W. Lee, Nano Energy 2017, 9.

[2] J. Shin, Y.J. Lee, A. Jan, S.M. Choi, M.Y. Park, S. Choi, J.Y. Hwang, S. Hong, S.G. Park, H.J. Chang, M.K. Cho, J.P. Singh, K.H. Chae, S. Yang, H.-I. Ji, H. Kim, J.-W. Son, J.-H. Lee, B.-K. Kim, H.-W. Lee, J. Hong, Y.J. Lee, K.J. Yoon, Energy & Environmental Science 2020 13 4903

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