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采用静电纺丝法制备了La1.6Sr0.4NiO4-Ag中空纳米纤维。利用XRD和SEM对材料物相及形貌进行分析。结果表明,800℃烧结2 h形成平均直径为400 nm的La1.6Sr0.4NiO4-Ag复合空心纤维;850℃烧结1 h,纤维交叉连接形成网格状结构,并与电解质紧密接触。EIS谱测试结果表明,La1.6Sr0.4NiO4-Ag纳米纤维电极在700℃空气气氛的极化电阻为0.32Ω·cm2;氧分压测试结果显示,在600~700℃范围内,电极反应速率控制步骤均为电荷转移反应。
La1.6Sr0.4NiO4-Ag hollow nanofibers were prepared by electrospinning method. The phase and morphology of the material were analyzed by XRD and SEM. The results show that La1.6Sr0.4NiO4-Ag composite hollow fiber with an average diameter of 400 nm is formed after sintering at 800 ℃ for 2 h. After 850 ℃ sintering for 1 h, the fibers are cross-linked to form a grid-like structure and are in close contact with the electrolyte. The results of EIS spectroscopy showed that the polarization resistance of La1.6Sr0.4NiO4-Ag nanofiber electrode in air atmosphere at 700 ℃ was 0.32Ω · cm2. The oxygen partial pressure test showed that the electrode reaction rate was controlled at 600 ~ 700 ℃ The steps are charge transfer reactions.