摘要
采用干压法制备阳极支撑固体氧化物燃料电池。阳极的组成为50wt%NiO+50wt%SDC(Ce0.8SM0.2O2-δ);电解质为BaCeO3及搀杂的BaCe0.8M0.2O29(M=Y、Gd、Sm);阴极采用85wt%LSCF(La0.9Sr0.1Co0.2Fe0.8O3-δ)+15wt%GDC(Ce0.8Gd0.2O2-δ)复合阴极(wt代表质量百分数)。在400℃-600℃的范围内,以天然气为燃料气,氧气为氧化气,50℃为间隔,测试并比较了各电池的性能,并用X射线衍射(XRD)分析所制样品粉体在1350℃烧结10小时后的晶体结构。实验表明:搀杂的BaCe0.8M0.2O29(M=Y、Gd、Sm)具有与BaCeO3相同的正交钙钛矿型结构。测试条件下以BaCe0.8Gd0.2O2.9为电解质的燃料电池具有更优的电化学性能,在600℃电池的最大电流密度为238.93mA/cm2,最大功率密度为49.41mW/cm2。
Anode-supported solid state fuel cells are fabricated by dry-pressing process. BaCeO3 and doped BaCe0.8M0.2O29 （M=Y、Gd、Sm） are used as electrolytes, 50wt%NiO＋50wt%SDC（Ce0.8SM0.2O2- 8） as anode and 85wt % LSCF （La0.9 Sr0. 1 Co0. 2 Fe0. 8 O3 -δ） ＋ 15 wt % GDC （Ce0. 8 Gd0. 2 02 -δ） as cathode. When the dry natural gas is used as fuel and oxygen as oxidant, each cell is tested and compared at the temperature from 400℃ to 600 ℃ ,and when using XRD to analyze the BaCeO3 and doped BaCe0.8M0.2O29 （M=Y、Gd、Sm）, which are sintered at 1350℃ for 10 h. The result shows that the cell using BaCe0.8Gd0.2 O29as electrolyte has the best performance at the test condition. The maximum current density and power density are 238.93mA/cm^2 and 49.41mW/cm^2at 600℃.
出处
《新疆师范大学学报（自然科学版）》
2008年第3期65-69,共5页
Journal of Xinjiang Normal University(Natural Sciences Edition)
