| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Effects of Sr contents on structural change and electrical conductivity in Cu-doped LSM (La1-xSrxMn0.8Cu0.2O3±δ) |
| 초록 | Strontium doped lanthanum manganite (LSM) with perovskite structure for SOFC cathode material shows high electrical conductivity and good chemical stability, whereas the electrical conductivity at intermediate temperature below 800℃ is not sufficient due to low oxygen ion conductivity. The approach to improve electrical conductivity is to make more oxygen vacancies by substituting alkaline earths (such as Ca, Sr and Ba) for La and/or a transition metal (such as Fe, Co and Cu) for Mn. Among various cathode materials, LaSrMnCuO3 has recently been suggested as the potential cathode materials for solid oxide fuel cells (SOFCs). As for the Cu doping at the B-site, it has been reported that the valence change of Mn ions is occurred by substituting Cu ions and it leads to formation of oxygen vacancies. The electrical conductivity is also affected by doping element at the A-site and the co-doping effect between A-site and B-site should be described. In this study, the La1-xSrxMn0.8Cu0.2O3±δ (0≤x≤0.4) systems were synthesized by a combined EDTA-citrate complexing process. The crystal structure, morphology, thermal expansion and electrical conductivity with different Sr contents were studied and their co-doping effects were also investigated. |
| 저자 | 류지승, 노태민, 김진성, 정철원, 이희수 |
| 소속 | 부산대 |
| 키워드 | lanthanum strontium manganese copper oxide; perovskite; oxygen vacancy; co-doping; cathode; SOFC |
