Degradation of solid oxide electrolysis cells: Phenomena, mechanisms, and emerging mitigation strategies—A review

• DOI: 10.1016/j.jmst.2019.07.026
• Publication Date: 2019-07-24T15:35:17Z
• Authors: Yi Wang; Wenyuan Li; Liang Ma; Wei Li; Xingbo Liu
• Keywords: 0211 other engineering and technologies; 02 engineering and technology; 7. Clean energy

Abstract Solid oxide electrolysis cell (SOEC) is a promising electrochemical device with high efficiency for energy storage and conversion. However, the degradation of SOEC is a significant barrier to commercial viability. In this review paper, the typical degradation phenomena of SOEC are summarized, with great attention into the anodes/oxygen electrodes, including the commonly used and newly developed anode materials. Meanwhile, mechanistic investigations on the electrode/electrolyte interfaces are provided to unveil how the intrinsic factor, oxygen partial pressure p O 2 , and the electrochemical operation conditions, affect the interfacial stability of SOEC. At last, this paper also presents some emerging mitigation strategies to circumvent long-term degradation, which include novel infiltration method, development of new anode materials and engineering of the microstructure.