Park, Mansoo Jung, Hwa Young Kim, Jeong Yun Kim, Hyoungchul Yoon, Kyung Joong Son, Ji-Won Lee, Jong-Ho Kim, Byung-Kook Lee, Hae-Weon 2024-01-20T00:30:32Z 2024-01-20T00:30:32Z 2021-09-03 2017-10-15 0272-8842 https://pubs.kist.re.kr/handle/201004/122166 For efficient development of high-performance composite electrodes for solid oxide fuel cells (SOFCs), it is crucial to precisely tailor the microstructural features of the electrodes, such as their grain size, phase connectivity, and pore structure. Herein, we report the effects of the mixing state of component powders of a composite cathode composed of Sr-doped LaMnO3 (LSM) and yttria-stabilized zirconia (YSZ) on its sintering behavior. LSM-YSZ composite powders were synthesized by a particle-dispersed glycine-nitrate process using YSZ particles as inclusions in the LSM precursor solution. The dispersion state of the YSZ particles in the solution was varied from a well-dispersed state to a highly flocculated state through adjustment of the amount of adsorbed polyethylene glycol. The dispersion state of the component powders was found to strongly impact the densification behavior of the composite, which was explained by the formation of a continuous network of the "slow-sintering" inclusion particles. A highly porous structure with phase connectivity and sufficient triple phase boundaries could be achieved by enhancing the mixing homogeneity and optimizing the mixing scale. The proposed concept provides new insights into the microstructural evolution of composites in constrained sintering, and it could potentially enable development of the ideal electrode structure for SOFCs. English ELSEVIER SCI LTD TEMPERATURE SOFC APPLICATIONS ELECTROCHEMICAL PERFORMANCE IMPEDANCE SPECTROSCOPY 3-DIMENSIONAL MICROSTRUCTURE DENSIFICATION INCLUSIONS OPTIMIZATION ELECTROLYTE COMPACTS MATRIX Effects of mixing state of composite powders on sintering behavior of cathode for solid oxide fuel cells Article 10.1016/j.ceramint.2017.05.347 1 CERAMICS INTERNATIONAL, v.43, no.15, pp.11642 - 11647 CERAMICS INTERNATIONAL 43 15 11642 11647 scie scopus 000408287900014 2-s2.0-85021218068 Materials Science, Ceramics Materials Science Article TEMPERATURE SOFC APPLICATIONS ELECTROCHEMICAL PERFORMANCE IMPEDANCE SPECTROSCOPY 3-DIMENSIONAL MICROSTRUCTURE DENSIFICATION INCLUSIONS OPTIMIZATION ELECTROLYTE COMPACTS MATRIX Composites (B) Sintering (A) LSM-YSZ (D) Fuel cells (E)