摘要
采用一种既简单又经济的双层干压法,NiO-YSZ阳极基底上制备致密的氧化钇稳定的氧化锆(YSZ)固体电解质薄膜,经1400!共烧结后,得到厚度约60"130mm的YSZ薄膜。薄膜的厚度可以通过调整YSZ粉体质量来控制。测试了NiO-YSZ支撑体材料和YSZ的干压坯体烧结曲线,以确定烧结收缩率。对薄膜进行的X-射线衍射(XRD)测量结果表明,薄膜为YSZ的立方萤石结构,NiO与YSZ在烧结条件下未发生反应。以此方法制备的不同厚度的YSZ薄膜为电解质,NiO-YSZ金属陶瓷为阳极,La0.7Sr0.3MnO(LSM)阴极制成固体氧化物燃料电池(SOFC)单电池,对单电池的放电性能及其在工作条件下的阻抗谱进行了测试。电池的开路电压始终在1V左右,900!最大电流密度达1.3A·cm#2。分别在800!和900!时得到了175mW·cm#2和300mW·cm#2的最大比功率。
A simple and economic double-layer dry-pressing process has been developed for preparing 8 %-yttria-stabilized zirconia （8 YSZ） membranes on porous NiO-YSZ anode substrates .After the bilayers were co-sintered at 1 400℃ for 4 h, YSZ electrolyte membranes as thin as 60-130 pm were obtained by double-layer dry-pressing, The membranes＇ thickness can be readily controlled by the mass of powders, The sintering curve and the sintering contractibility ratio were studied. X-ray diffraction （XRD） results show that the membrane is a cubic fluorite structure and there is no reaction between NiO and YSZ during the sintering process. At last the electrolyte membranes were studied in SOFC with Lao.TSr0.3MnO3（LSM） as cathode . The performance and impedance spectra of the cells were measured. Power densities of 175 mW·cm^-2 and 300 mW·cm^-2are demonstrated at 800℃ and 900℃,respectively.Open-circuit voltages about 1 V are obtained.
出处
《电源技术》
CAS
CSCD
北大核心
2005年第11期737-740,共4页
Chinese Journal of Power Sources
基金
国家"863"计划基金资助项目(No.2001AA323090)
