کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1298659 974010 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability, chemical compatibility and electrochemical performance of GdBaCo2O5 + x layered perovskite as a cathode for intermediate temperature solid oxide fuel cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Stability, chemical compatibility and electrochemical performance of GdBaCo2O5 + x layered perovskite as a cathode for intermediate temperature solid oxide fuel cells
چکیده انگلیسی

Stability under atmospheres containing CO2 and chemical compatibility of GdBaCo2O5 + x with different oxide-ion conductors (8 mol% Y2O3-ZrO2, La0.8Sr0.2Ga0.8Mg0.2O3-δ and Ce0.9Gd0.1O1.95) have been studied in order to evaluate its suitability as a cathode material for Solid Oxide Fuel Cells (SOFCs). Thermal evolution of X-ray diffraction patterns of GdBaCo2O5 + x in atmospheres with different contents of carbon dioxide (500 ppm to 100% CO2) was used to determine the stability of this compound, which is susceptible to carbonate due to the presence of Ba. Remarkable stability under air conditions for long periods of time (100 h) at different temperatures of interest (500, 600 and 700 °C) was observed. Chemical compatibility with different electrolytes was evaluated analysing the evolution with calcination temperature (800–1200 °C) of the X-ray diffraction patterns of intimate mixtures of GdBaCo2O5 + x with each electrolyte. Electrochemical characterization by means of impedance spectroscopy as a part of optimized symmetrical cells (GdBaCo2O5 + x/electrolyte/GdBaCo2O5 + x) were carried out yielding excellent performance for La0.8Sr0.2Ga0.8Mg0.2O3-δ and Ce0.9Gd0.1O1.95 electrolyte-based cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issue 40, 31 December 2008, Pages 2372–2378
نویسندگان
, , , , , ,