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A high performance intermediate temperature fuel cell based on a thick oxide-carbonate electrolyte

Zhang, Lei and Lan, Rong and Xu, Xiaoxiang and Tao, Shanwen and Jiang, Yinzhu and Kraft, Arno (2009) A high performance intermediate temperature fuel cell based on a thick oxide-carbonate electrolyte. Journal of Power Sources, 194 (2). pp. 967-971. ISSN 0378-7753

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A high performance intermediate temperature fuel cell (ITFC) with composite electrolyte composed of codoped ceria Ce0.8Gd0.05Y0.15O1.9 (GYDC) and a binary carbonate-based (52 mol% Li2CO3/48 mol% Na2CO3), 1.2 mm thick electrolyte layer has been developed. Co-doped Ce0.8Gd0.05Y0.15O1.9 was synthesized by a glycine-nitrate process and used as solid support matrix for the composite electrolyte. The conductivity of both composite electrolyte and GYDC supporting substrate were measured by AC impedance spectroscopy. It showed a sharp conductivity jump at about 500 degrees C when the carbonates melted. Single cells with thick electrolyte layer were fabricated by a dry-pressing technique using NiO as anode and Ba0.5Sr0.5Co0.8Fe0.2O3-delta or lithiated NiO as cathode. The cell was tested at 450-550 degrees C using hydrogen as the fuel and air as the oxidant. Excellent performance with high power density of 670 mW cm(-2) at 550 degrees C was achieved fora 1.2 mm thick composite electrolyte containing 40 wt% carbonates which is much higher than that of a cell based on pure GYDC with a 70 mu m thick electrolyte layer.

Item type: Article
ID code: 34086
Keywords: intermediate temperature, fuel cell, co-doped ceria, composite electrolyte, electrical properties, proton conduction, doped ceria, stability, fabrication, ceramics, defects, anode, Chemistry, Energy Engineering and Power Technology, Physical and Theoretical Chemistry, Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment
Subjects: Science > Chemistry
Department: Faculty of Engineering > Chemical and Process Engineering
Depositing user: Pure Administrator
Date Deposited: 18 Oct 2011 14:31
Last modified: 10 Dec 2015 20:27

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