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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
(a) Stability tests of the SSOFCs with LSFNM-SDCi and LSFN-SDCi electrodes at 700 °C. (b,c) SEM images of cross-sections of the SSOFC with LSFNM-SDCi electrode, after the stability test.