【摘要】 采用固相法合成电解质材料La1-xSrxGa1-yMgyO3-δ(LSGM)和阳极材料La1-xSrxCr1-yMnyO3-δ(LSCM),用溶胶-凝胶法合成阴极材料La1-xSrxFe1-yCoyO3-δ(LSFC)。利用扫描电子显微镜(SEM)、X射线衍射分析(XRD)、交流阻抗、直流四探针法等技术,对材料的结构及性能进行表征。在1450℃和1480℃下烧结24h均得到了单一相的LSGM;在1250℃和1350℃下烧结15h均得到了单一相的LSCM,LSCM在850℃时的总电导率为1.5S/cm;LSGM的阻抗图谱由两个半圆组成,显示出良好的离子电导特性;合成LSFC的胶体经过400℃和750℃焙烧后,形成了单一相的LSFC;用丝网印刷方式,制备LSCM/LSGM/LSFC(LSCM)三合一复合膜,电极膜的烧结温度为1150℃,以此复合膜为基础组装单电池并进行性能考察。更多还原

【Abstract】 La1-xSrxGa1-yMgyO3-δ(LSGM) electrolyte and La1-xSrxCr1-yMnyO3-δ(LSCM) anode materials were synthesized by solid state reaction method, and La1-xSrxFe1-yCoyO3-δ (LSFC) cathode material by sol-gel method. The microstructure and characteristics of them were tested by X-ray diffraction (XRD), scanning electron microcopy (SEM), AC impedance, and four-probe direct current methods. Pure phase LSGM was prepared after sintering for 24 h at both 1 450 ℃ and 1 480 ℃. Pure phase LSCM was prepared after sintering for 15 h at both 1 250 ℃ and 1 350 ℃, and the total conductivity of LSCM was 1.5 S/cm at 850 ℃. AC impedance spectra show that LSGM has good ionic conductivity. Single-phase LSFC was obtained when its precursor was sintered two times at 400 ℃ and 750 ℃, respectively. LSCM anode and LSFC(LSCM) composite cathode films were prepared by screen printing method by sintering at 1 150 ℃. The performance of cell consisting of the above composite membrane was investigated.更多还原