CYO-BZCYO composites with enhanced proton conductivity: Candidate electrolytes for low-temperature solid oxide fuel cells

被引：19
作者：
Huang, Jianbing [1 ]
Zhang, Li [2 ]
Wang, Cheng [3 ]
Zhang, Ping [2 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Sch Energy & Power Engn, Xian 710049, Peoples R China
[2] China Univ Geosci, Fac Mat Sci & Chem Engn, Wuhan 430074, Peoples R China
[3] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 17期
关键词：
Ce0.8Y0.2O1.9(CYO); BaZr0.1Ce0.7Y0.2O2.9(BZCYO); Composite electrolyte; Proton conductivity; Low-temperature solid oxide fuel cells (LT-SOFCs); DOPED CERIA; ELECTRICAL-PROPERTIES; CHEMICAL-STABILITY; 500-DEGREES-C; CONDUCTORS; OPERATION; SOFCS;
D O I：
10.1016/j.ijhydene.2012.05.040
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：
Novel composite oxide ion conductors were developed based on a fluorite-type Ce0.8Y0.2O1.9 (CYO) and a perovsldte-type BaZr0.1Ce0.7Y0.2O2.9 (BZCYO) synthesized by the carbonate co-precipitation route at 700 degrees C and the sol-gel process at 1000 C, respectively. When sintered at 1400 degrees C, CYO and BZCYO showed an ac conductivity of 1.60 x 10(-2) S cm(-1) and 1.21 x 10(-2) S cm(-1) at 600 degrees C, respectively, in dry air and wet hydrogen. CYO-BZCYO composites sintered at 1400 degrees C showed much lower conductivity than CYO and BZCYO in dry air, but they showed enhanced conductivity in wet hydrogen. The highest conductivities of 3.27 x 10(-2) S cm(-1) at 500 degrees C and 9.40 x 10(-3) S cm(-1) at 400 degrees C were achieved in wet hydrogen by the composite containing 30wt.% BZCYO, which are 3-5 times higher than those of CYO and BZCYO, making this composite material a promising candidate as an electrolyte for low-temperature solid oxide fuel cells (LT-SOFCs). Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved
引用
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页码：13044 / 13052
页数：9
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