硅酸盐学报Issue(7)：852-857,6.DOI:10.14062/j.issn.0454-5648.2015.07.02
新型复合阴极 Sr0.95Ti0.05Co0.95O3-δ-Sm0.2Ce0.8O1.9在中低温固体氧化物燃料电池中的性能
Performance of Composite Cathode Sr0.95Ti0.05Co0.95O3-δ-Sm0.2Ce0.8O1.9 Used in Intermediate Temperature SOFCs
摘要
Abstract
A cathode powder of Sr0.95Ti0.05Co0.95O3−δ(STC) and an electrolyte powder of Sm0.2Ce0.8O1.9 (SDC) were synthesized by a citric acid-nitrates self-propagating combustion method. The composite-cathode was obtained by mixing the STC and SDC powders in a mass ratio of 7:3. The chemical compatibility, electrical conductivity and thermal expansion coefficient of the composite cathode were characterized by X-ray diffraction(XRD), direct current four-terminal method and thermal dilatometer, respectively. The XRD results show that a pure cubic STC perovskite phase can be obtained at 900 and℃ no second phase is formed in the composite cathode at the operating temperature. The polarization resistance of the electrode is only 0.05 Ω·cm2 at 650 ℃. The anode-supported solid oxide fuel cells of NiO-SDC│SDC│STC−SDC were fabricated. The electrochemical performances were examined at 450−650 ℃ with humidified hydrogen (about 3% H2O) as a fuel and air as an oxidant. It is demonstrated that the anode-supported half cells can be sintered at 1 350 with a dense electrolyte layer and porous℃ electrodes, and the single cell with an open circuit voltage of 0.82 V and the maximum power density of 721 mW/cm2 at 650 ℃ can be obtained. These results indicate that STC−SDC is a promising composite cathode candidate for IT-SOFC with SDC electrolyte.关键词
复合阴极/极化阻抗/最大功率/中低温固体氧化物燃料电池Key words
composite-cathode/polarization resistance/peak power/intermediate temperature-solid oxide fuel cell分类
化学化工引用本文复制引用
余良浩,王晓晴,林彬,田冬,卢肖永,顾庆文,陈永红..新型复合阴极 Sr0.95Ti0.05Co0.95O3-δ-Sm0.2Ce0.8O1.9在中低温固体氧化物燃料电池中的性能[J].硅酸盐学报,2015,(7):852-857,6.基金项目
国家自然科学基金项目(51102107,51202080)；安徽科技项目(1206c0805038)资助。 （51102107,51202080）
