کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10155444 1666349 2018 52 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An investigation on the microstructural and electrical properties of La0.85DxSr0.15-xGa0.8Mg0.2O2.825 (D = Ba and Ca) electrolytes in solid oxide fuel cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
An investigation on the microstructural and electrical properties of La0.85DxSr0.15-xGa0.8Mg0.2O2.825 (D = Ba and Ca) electrolytes in solid oxide fuel cells
چکیده انگلیسی
La0.85DxSr0.15-xGa0.8Mg0.2O2.825 (D = Ba and Ca, x = 0, 0.01, 0.03, 0.05, and 0.07) electrolytes were synthesized using a solid-state reaction method, calcined at 1400 °C for 5 h, and sintered at 1400 °C for 5 h. The microstructures, electrical properties, and cell performances of the electrolytes and fuel cells were analyzed by X-ray diffraction, scanning electron microscopy, impedance analysis, and electrochemical analysis. La0.85BaxSr0.15-xGa0.8Mg0.2O2.825 (LBSGM) and La0.85CaxSr0.15-xGa0.8Mg0.2O2.825 (LCSGM) exhibit a dense structure and a cubic perovskite phase. Further, they contain small amounts of a secondary phase. The lattice constants of LBSGM and LCSGM are 0.3913-0.3914 nm and 0.3906-0.3909 nm, respectively. The average grain size of the sample increases with increasing Ba2+ or Ca2+ content. The conductivity of LCSGM (0.197-0.174 S/cm) is usually higher than that of LBSGM (0.181-0.162 S/cm) at 800 °C. The cells with La0.85Sr0.15Ga0.8Mg0.2O2.825 and La0.85Ca0.03Sr0.12Ga0.8Mg0.2O2.825 electrolytes exhibit high open-circuit voltages and maximum power densities of 0.96 V and 542 mW/cm2 and 0.94 V and 567 mW/cm2, respectively, at 800 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19706-19717
نویسندگان
, ,