流延法制备SOFC NiO/YSZ阳极的研究  

Study of NiO/YSZ anode for SOFC prepared by tape casting

作　　者：乐士儒[1] 孙克宁[1] 徐峰[1] 安茂忠[1] 张乃庆[1] 朱晓东[1] 付强[1] 

机构地区：[1]哈尔滨工业大学应用化学系,黑龙江哈尔滨150001

出　　处：《功能材料》2008年第4期618-621,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(90510006)

摘　　要：流延法制备了SOFC NiO/YSZ阳极,比较了NiO(微米级)和NiO(纳米级)两种NiO,发现由NiO(纳米级)制备的电池在800℃最大放电功率密度257.1mW/cm2,而由NiO(微米级)制备的电池相同条件下仅为124.9mW/cm2,原因在于NiO(纳米级)粒径小,制备的阳极三相反应区大。NiO(纳米级)经700℃煅烧后制备的电池最大功率密度增加到369.0mW/cm2,而800℃和900℃煅烧时减少到169.5和159.0mW/cm2,因为700℃煅烧增加了NiO的活性,而800和900℃煅烧的NiO粒径增大到1.35μm,制备的阳极减小了反应活性区。YSZ在1200℃煅烧后,粒径从0.2μm增加到34μm,由于YSZ粒径远大于NiO,导致NiO之间接触不良,制备的电池性能下降到120.0mW/cm2,继续球磨12h后,YSZ粒径减小到0.70μm,NiO和YSZ之间分布均匀,制备的电池放电功率密度提高到447.9mW/cm2。NiO-μm and NiO-nm in SOFC anodes, which were prepared by tape casting, were compared. It was found that,the maximum power density of the cell with NiO-nm as anode was 257. 1mW/cm^2 at 800℃ ,but that was only 124.9mW/cm^2 for NiO-μm. The reason was that the anode with NiO-nm has larger trible phase bound- ary. After calcining at 700℃ for NiO-nm, the power density increased to 369. 0mW/cm^2, while it deceased to 169.5 and 159.0mW/cm^2 at 800 and 900℃ respectively,because NiO calcined at 700℃ improved its activity and held its small particle size,but the particle increased abruptly up to 1.35μm at 800 and 900℃. When YSZ in the anodes calcined at 1200℃, the particle size increased from 0.2-34μm, the maximum power density of the cell decreased to 120.0mW/cm^z, because NiO was isolated by large YSZ. However, these YSZ were milled for 12h, the particle size decreased to 0. 70μm and the power density increased to 447.9mW/cm^2 because of YSZ and NiO distributed uniformity.

关 键 词：SOFC 流延法 粒径 阳极 

分 类 号：O61[理学—无机化学]