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Oxygen ionic conduction in doped ceria-carbonate composite with a controllable structure
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:28 April 2017
Accepted by: none
Citation: ZHAO Yicheng . Oxygen ionic conduction in doped ceria-carbonate composite with a controllable structure [OL]. [28 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4727215
 
 
Doped ceria-carbonate composite with a high O2- conductivity has been considered as a promising electrolyte for solid oxide fuel cells, while the irregular distribution of its components leads to difficulties in investigating O2- conduction. In this work, samarium doped ceria-(Li0.52Na0.48)2CO3composite electrolyte is synthesized through a sacrificial NiOtemplate- infiltration method.The content and distribution of ceramic and carbonate phasesare controlled by varying the NiO content and the sintering temperature of SDC-NiO composite.Results of direct current four probe measurement show that molten carbonate dominatesO2- conduction in the composite. The tortuosity and inter-particle neck size of ceramic and carbonate phases, instead of the interface, present significant impact on the conductivity of O2-.
Keywords:Oxygen ionic conduction; Composite electrolyte; Sacrificial template method; porous ceramic; Samarium doped ceria; Solid oxide fuel cell
 
 
 

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