Why solid oxide cells can be reversibly operated in solid oxide electrolysis cell and fuel cell modes?
MetadataShow full item record
© 2015 the Owner Societies. High temperature solid oxide cells (SOCs) are attractive for storage and regeneration of renewable energy by operating reversibly in solid oxide electrolysis cell (SOEC) and solid oxide fuel cell (SOFC) modes. However, the stability of SOCs, particularly the deterioration of the performance of oxygen electrodes in the SOEC operation mode, is the most critical issue in the development of high performance and durable SOCs. In this study, we investigate in detail the electrochemical activity and stability of La0.8Sr0.2MnO3 (LSM) oxygen electrodes in cyclic SOEC and SOFC modes. The results show that the deterioration of LSM oxygen electrodes caused by anodic polarization can be partially or completely recovered by subsequent cathodic polarization. Using in situ assembled LSM electrodes without pre-sintering, we demonstrate that the deteriorated LSM/YSZ interface can be repaired and regenerated by operating the cells under cathodic polarization conditions. This study for the first time establishes the foundation for the development of truly reversible and stable SOCs for hydrogen fuel production and electricity generation in cyclic SOEC and SOFC operation modes.
Funding and Sponsorship
Showing items related by title, author, creator and subject.
Mechanism and kinetics of Ni-Y2O3-ZrO2 hydrogen electrode for water electrolysis reactions in solid oxide electrolysis cellsPan, W.; Chen, K.; Ai, N.; Lü, Z.; Jiang, San Ping (2016)© The Author(s) 2015. Published by ECS. Ni-Y2O3 stabilized ZrO2 (Ni-YSZ) cermet is the most commonly used hydrogen electrode for hydrogen oxidation reaction (HOR) under solid oxide fuel cell (SOFC) mode and water reduction ...
Chen, K.; Jiang, San Ping (2016)© 2016 The Electrochemical Society. All rights reserved.Renewable energy sources such as solar and wind power are important for the future energy supply chain, but require suitable energy storage and conversion technologies ...
Novel solid oxide cells with SrCo0.8Fe0.1Ga0.1O3-d oxygen electrode for flexible power generation and hydrogen productionMeng, X.; Shen, Y.; Xie, M.; Yin, Y.; Yang, N.; Ma, Z.; Diniz Da Costa, J.; Liu, Shaomin (2016)This work investigates the performance of solid oxide cells as fuel cells (SOFCs) for power production and also as electrolysis cells (SOECs) for hydrogen production. In order to deliver this dual mode flexible operation ...