期刊
JOURNAL OF POWER SOURCES
卷 188, 期 1, 页码 156-162出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2008.11.068
关键词
Doped ceria; Composite electrolyte; Intermediate temperature fuel cell; Ternary ionic conduction; Molten carbonate fuel cell
资金
- Natural Science Foundation of China [20425619, 20736007]
- Program of Introducing Talents to the University Disciplines [B06006]
- Program for Changjiang Scholars and Innovative Research Teams in Universities [IRT 0641]
The performance of a composite electrolyte composed of a samarium doped ceria (SDC) and a ternary eutectic carbonate melt phase was examined. The formation temperature of a continuous carbonate melt phase is crucial to the high conductivity of this material. The electrolyte contains 30 and 50 wt% carbonate exhibited a sharp increase of conductivity at a temperature close to the melting point of the eutectic carbonate, ca 400 degrees C. which is more than 100 degrees C lower than those electrolytes using binary carbonate. At around 650 degrees C, and with CO2/O-2 used as the cathode gas, the fuel cell gave a power output 720 mW cm(-2) at a current density 1300 mA cm(-2). Water was measured in both the anode and cathode outlet gases and CO2 was detected in the anode outlet gas. When discharged at 800 mA cm(-2), a stable discharge plateau was obtained. The CO2 in the cathode gas enhances the power output and the stability of the single cell. Based on these experimental facts, a ternary ionic conducting scheme is proposed and discussed. (C) 2008 Elsevier B.V. All rights reserved.
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