Park Mi Young SHIN, JISU Park, Sun Young Won Ji-eun Hwang, Jun Yeon Hong, Seung ki Kim, Si-Won Jang, Ji-Hoon Yoon, Kyung Joong 2024-01-12T06:32:57Z 2024-01-12T06:32:57Z 2023-10-31 2023-11 1385-8947 https://pubs.kist.re.kr/handle/201004/79774 High-temperature solid oxide cells (SOCs) offer one of the most efficient and versatile routes for producing electric power and H2. However, the practical use of nanomaterials in SOCs has been limited by their lack of thermal stability. In this study, we present an infiltration technique that enables the in situ synthesis of extremely small, thermally stable perovskite (Sm0.5Sr0.5)CoO3 nanocatalysts on the inner surface of porous SOC electrodes. We identified certain impurity phases, such as SrCO3, that cause fatal degradation and eliminated them using a rational complexation strategy optimized for individual constituent cations. Consequently, we fabricated ∼ 20 nm diameter, highly pure, single-phase nanocatalysts that achieved more than double the performance of a cell with standard (La,Sr)(Co,Fe)O3？ and (La,Sr)CoO3-based air electrode. The cells stably operated during long-term tests in both the power generation and H2 production modes, with negligible degradation. Furthermore, we successfully scaled up this process to fabricate large-scale commercial cells using a fully automated process. The key findings of this study will resolve critical barriers with high-temperature nanomaterials and accelerate the commercialization of SOC technology. English Elsevier BV In situ synthesis of extremely small, thermally stable perovskite nanocatalysts for high-temperature electrochemical energy devices Article 10.1016/j.cej.2023.146924 1 Chemical Engineering Journal, v.476 Chemical Engineering Journal 476 Y scie scopus 001105902900001 Engineering, Environmental Engineering, Chemical Engineering Article OXIDE FUEL-CELLS INFILTRATED OXYGEN ELECTRODES HIGH-PERFORMANCE SOFC CATHODES LA0.6SR0.4CO0.2FE0.8O3-DELTA SCAFFOLDS MECHANISM ELECTROCATALYST NANOMATERIALS DECOMPOSITION Solid oxide cell Nanocatalyst Perovskite Infiltration Degradation