Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction

被引：247

作者：

Leng, YJ ^{[1
]}

Chan, SH ^{[1
]}

Jiang, SP ^{[1
]}

Khor, KA ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Fuel Cell Strateg Res Programme, Singapore 639798, Singapore

来源：

SOLID STATE IONICS | 2004年 / 170卷 / 1-2期

关键词：

low-temperature SOFC; thin film electrolyte; gadolinia-doped ceria (GDC); solid-state reaction;

D O I：

10.1016/j.ssi.2004.02.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dense electrolyte thin film made of Ce0.8Gd0.2O1.90 (GDC20) with a thickness of about 10 run and supported by Ni-Gd0.1Ce0.9O1.95 (GDC) cermet anode was fabricated in situ by solid-state reaction of ceria and gadolinia. The open circuit voltage of this GDC20 cell is 0.86 V at 600 degreesC and 0.95 V at 500 degreesC. With La0.8Sr0.2Co0.2Fe0.8O3 (LSCF)-GDC composite cathode, we could achieve an excellent cell performance with the maximum power density of 578, 358, and 167 mW/cm(2) at 600, 550 and 500 degreesC, respectively, under open-air conditions. With airflow through the cathode, the maximum power density increases to 625 mW/cm(2) at 600 degreesC. It was also found that the cell impedance/polarization under open circuit is dominated by electrode polarization contribution; while under high cell overpotential, it is governed by both ohmic loss and electrode polarization contribution. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：9 / 15

页数：7

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