کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5150618 | 1498244 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
La2NiO4 + δ as electrode material for solid oxide fuel cells and electrolyzer cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
In this work, the mixed ionic-electronic conducting ceramic La2NiO4 + δ is investigated with respect to its applicability as SOFC cathode as well as SOEC anode material on the basis of electrolyte-supported button cells. Results are obtained by electrochemical impedance spectroscopy and current-voltage analyses on symmetrical cells with screen printed La2NiO4 + δ electrodes under both anodic and cathodic polarization, where special emphasis is put on the chromium tolerance of the material. The long-term behavior of electrodes in pure oxygen/argon as well as in humidified chromium-containing atmospheres is studied at 800 °C both under open circuit conditions and with applied current load. Once a chromium source is introduced in humid conditions, a strong decline in the cell performance occurs which can be mainly ascribed to a deactivation of the SOFC cathode layer. Post-test analytical investigations of cell cross sections by SEM and TEM suggest differences in the extent of Cr-contamination to be the main factor for the pronounced discrepancy between degradation rates of both electrodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 299, January 2017, Pages 18-25
Journal: Solid State Ionics - Volume 299, January 2017, Pages 18-25
نویسندگان
Andreas Egger, Nina Schrödl, Christian Gspan, Werner Sitte,