Zircontes/Sulfates Composites:Perfect Combination of High-and Low-Temperature Protonic Conductors
Two typical classes of proton conductors,zirconates and solid acids (such as CsHSO4) or related sulfates,are intensively investigated recently.Based on the different proton-conducting mechanisms ofzirconates and sulfates,we designed and fabricated Y2O3-doped barium zirconate/sulfates composites,aiming to make full use of the benefits,and eliminate the drawbacks of the two individual materials.The electrical conduction of the composite was studied by electrical and electrochemical methods.Microstructure of the composites was examined by SEM.Electromotive force (EMF) measurements were conducted under fuel cell conditions.The results indicated that small amount of sulfates was introduced at the grain boundaries of BaZr0.9Y0.1O2.95.The electrical conductivity of the composites was greatly improved and the total ionic transport numbers of the composites are more than 0.9 at 750 ℃.
protonic conductor Zirconate/sulfate composites electrolyte AC impedance spectrum
PENG Zhenzhen GUO Ruisong YIN Ziguang LI Juan
School of Materials Science and Engineering of Tianjin University, Key Laboratory of Advanced Cerami School of Materials Science and Engineering of Tianjin University, Key Laboratory of Advanced Cerami
国际会议
The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))
哈尔滨
英文
719-722
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）