【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。更多还原

【Abstract】 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 mm 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 La0.7Sr0.3MnO3(LSM) as cathode .The performance and impedance spectra of the cells were measured. Power densities of 175 mW·cm-2 and 300 mW·cm-2 are demonstrated at 800 ℃ and 900 ℃,respectively.Open-circuit voltages about 1 V are obtained.更多还原