Powders of La0.90Sr0.10Al0.97Mg0.03O3-δ (LSAM) were synthesized by the glycine-nitrate process, and then sintered at 1500 °C for 5 h. Impedance spectroscopy at 900 °C in air revealed that the conductivity of LSAM was 1.11×10-2 S·cm-1. The chemical compatibility of LSAM with anode materials NiO-Ce0.9Gd0.1O1.95 (Ni-GDC), Sr0.88Y0.08TiO3 (SYT) and La0.75Sr0.25Cr0.5Mn0.5O3 (LSCM) was characterized by X-ray diffraction, scanning electron microscopy with energy-dispersive X-ray spectroscopy and AC impedance spectroscopy. The results indicated that SYT and LSCM had poor chemical compatibility with LSAM because Sr2 +, Ti4 +, Mn3 +, and Cr3 + diffused readily into the LSAM lattice. The interdiffusion of cations between LSAM and Ni-GDC at 1300 °C was limited, implying excel ent chemical compatibility. The electrochemical performance of symmetrical cel s of the anode materials was measured under hydrogen atmosphere. The area-specific polarization resistance of Ni-GDC was 5.12 Ω·cm2 at 800 °C. An open-circuit voltage of 0.925 V and a power density of 19.5 mW·cm-2 were obtained at 800 °C for a 550 µm thick LSAM electrolyte-supported single cel (Ni-GDC/GDC/LSAM/GDC/La0.75Sr0.25FeO3).% 采用甘氨酸-硝酸盐法(GNP)合成La0.90Sr0.10Al0.97Mg0.03O3-δ(LSAM)粉体,成型后经1500°C、5 h烧结的样品,900°C时其电导率为1.11×10-2 S·cm-1.利用X射线衍射(XRD)、扫描电镜/X射线能谱分析(SEM/EDX)和交流阻抗技术等表征手段研究 NiO-Ce0.9Gd0.1O1.95(Ni-GDC)、Sr0.88Y0.08TiO3(SYT)和 La0.75Sr0.25Cr0.5Mn0.5O3(LSCM)三种阳极材料与 LSAM 电解质的化学相容性.结果表明, SYT 和 LSCM 与 LSAM 的化学相容性欠佳, SYT中的Sr2+和Ti4+向LSAM晶格的扩散明显, LSCM中的Mn3+和Cr3+向LSAM晶格的扩散显著；而Ni-GDC与LSAM具有良好的化学相容性,在1300°C下两材料间阳离子的相互扩散作用极小.800°C时Ni-GDC的比表面极化电阻(RASP)值为5.12Ω·cm2. LSAM 电解质(厚度为550μm)支撑的 Ni-GDC/GDC/LSAM/GDC/LSF (La0.75Sr0.25FeO3)单电池,在800°C时电池的开路电压为0.925 V,最大功率密度为19.5 mW·cm-2.
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