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Proton conduction in doped ceria-carbonate composite electrolytes
Zhao Yicheng * #
School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050
*Correspondence author
#Submitted by
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Funding: Doctoral Program of the Ministry of Education(No.20130032120023)
Opened online: 5 May 2017
Accepted by: none
Citation: Zhao Yicheng . Proton conduction in doped ceria-carbonate composite electrolytes [OL]. [ 5 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4727218
 
 
Doped ceria-carbonate composite is considered as a promising electrolyte for intermediate temperature solid oxide fuel cells. H+ conduction in the composite has attracted much attention in recent years, while its mechanism has not been revealed clearly. In this work, H+ conductivities of samarium doped ceria-carbonate composites with varying composition are measured by a four-probe direct current method. For composites with aggregated carbonate phase, H+ conductivity increases with the rise of carbonate content, while for composites with a more homogeneous distribution of phases, a larger interfacial region means higher H+ conductivity. We propose that H+ conducts through both the molten carbonate phase and the interfacial region. H+ conduction at the interface is influenced by the composition of the ceramic phase.
Keywords:Proton conduction; Composite electrolyte; Interfacial effect; Samarium doped ceria; Carbonate; Solid oxide fuel cell
 
 
 

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