材料科学
钴酸盐
阴极
固体氧化物燃料电池
阳极
氧化钇稳定氧化锆
电极
电解质
镧
陶瓷
铂金
氧化物
化学工程
分析化学(期刊)
复合材料
冶金
无机化学
立方氧化锆
电气工程
催化作用
工程类
物理化学
化学
生物化学
色谱法
作者
Junsik Park,Jiwoong Bae,Young‐Beom Kim
标识
DOI:10.1016/j.ceramint.2016.05.050
摘要
Porous strontium-doped lanthanum cobaltite (La0.5Sr0.5CoO3−δ, LSC) thin film electrodes were deposited by a metal-organic chemical solution deposition method. These films were used as cathodic electrodes replacing precious metal electrodes for low-temperature solid oxide fuel cell (LT-SOFC) applications. They were characterized electrochemically and compared with devices that had platinum (Pt) cathodes. Pt was prepared by a DC magnetron sputtering method and LSC-YSZ-Pt and Pt-YSZ-Pt (cathode-electrolyte-anode) SOFC unit cells were fabricated. The performance of each cell was continuously evaluated under operating conditions and the performance of fuel cells with a Pt cathode was superior to those using a LSC cathode at the initial stages of operation; however, the output power density started to decrease as a function of time due to the degradation that comes from the heat vulnerability of Pt. As a consequence, the performance of Pt-YSZ-Pt was significantly lower than LSC-YSZ-Pt, and the electrode resistance grew to be about four times larger compared to before operation. In contrast, neither the output power density nor the electrode resistance of LSC-YSZ-Pt changed during operation. These results imply that LSC has better long-term performance stability compared to Pt and feasibility of using ceramic electrode for low-temperature solid oxide fuel cells.
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