Hwang, Jaeyeon Lee, Heon Yoon, Kyung Joong Lee, Hae-Weon Lee, Jong-Ho Song, Hue-Sup Son, Ji-Won 2024-01-20T11:04:32Z 2024-01-20T11:04:32Z 2021-09-04 2013-11 1598-9623 https://pubs.kist.re.kr/handle/201004/127508 In this study, the microstructural modification of pulsed laser deposited La0.6Sr0.4CoO3-delta (LSC64) thin-film cathodes for solid oxide fuel cells (SOFCs) to improve the lateral conduction and to reduce the surface composition degradation is investigated. A high-temperature deposited 100 nm-thick denser LSC64 layer is added over 2.4 mu m-thick porous cathode to cover and bridge the cathode domains. According to the cell performance analyses using current-voltage-power measurements, the performance of the cell modified with an additional denser layer is increased compared with the cell without the denser layer in all operating temperature range. The degree of improvement of peak power density is bigger than 10% at 650-550 A degrees C and is about 6% at 500 A degrees C. This performance enhancement can be attributed to the electrochemical property improvement, especially oxygen surface exchange property, rather than to the conduction improvement, based on the electrochemical impedance analysis. Improved crystallinity and composition integrity of the denser LSC64 layer is considered to enhance the surface exchange property of the cathode. English KOREAN INST METALS MATERIALS OXYGEN-REDUCTION ELECTRODES COMPOSITE Microstructure refinement of pulsed laser deposited La0.6Sr0.4CoO3-delta thin-film cathodes for solid oxide fuel cell Article 10.1007/s12540-013-0638-9 1 METALS AND MATERIALS INTERNATIONAL, v.19, no.6, pp.1347 - 1349 METALS AND MATERIALS INTERNATIONAL 19 6 1347 1349 scie scopus kci ART001818771 000327080600028 2-s2.0-84888421209 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article OXYGEN-REDUCTION ELECTRODES COMPOSITE solid oxide fuel cell pulsed laser deposition cathode surface modification