ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
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English
Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
Publication history
Received February 6, 2026
Revised April 27, 2026
Accepted May 25, 2026
Available online June 25, 2026
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Materials and Microstructure in Solid Oxide Electrolysis Cells: Linking Performance and Durability

Department of Chemical Engineering, Dankook University, Yongin-si
swkang@smu.ac.kr, kimj1225@dankook.ac.kr
Korean Journal of Chemical Engineering, June 2026, 43(7), 1939-1973(35)
https://doi.org/10.1007/s11814-026-00740-0

Abstract

Solid oxide electrolysis cells (SOECs) represent a transformative technology for the efficient production of green hydrogen

and syngas from water and carbon dioxide, leveraging high operating temperatures to enhance reaction kinetics and 

thermodynamic efficiency. This review provides a comprehensive overview of the critical correlations between material 

properties, electrode microstructure, and overall SOEC performance. We delve into the impact of triple-phase boundary 

density, electronic/ionic conductivity, and surface chemistry on cell efficiency and current densities. Furthermore, the paper 

highlights significant performance improvements achieved over time, including higher current densities, reduced operating 

temperatures, and enhanced long-term durability, alongside major breakthroughs such as industrial-scale demonstrations, 

high-pressure operation, direct CO2 electrolysis, and the development of reversible solid oxide cells. Understanding these 

advancements and the underlying material science challenges is crucial for accelerating the commercialization of SOEC 

technology for a sustainable energy future.

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