Abstract
The goal of this study is to improve the applicability of cerium pyrophosphates as dense electrolytes in proton-conducting ceramic-electrolyte fuel cells (PCFCs) in 100–230°C, by using polystyrene as a pore-filler in partially sintered cerium pyrophosphate substrates. In this study an inorganic-organic composite membrane composed of Gd3+-doped cerium pyrophosphate (Ce0.9Gd0.1P2O7, CGP) and highly cross-linked polystyrene is prepared by polymerization of divinylbenzene monomers in partially sintered CGP substrates. The microstructure and electrochemical behavior of the CGP-polystyrene (CGP-PS) composites are characterized to understand their proton conductivity and long-term stability. The ionic conductivity measurement using electrochemical impedance spectroscopy (EIS) shows that the CGP-PS membranes have high ionic conductivity (>10 mS cm−1) in 110–200°C range under humidified condition (water vapor pressure, pH2O = 0.04-0.16 atm); where CGP-PS1 shows maximum conductivities of 16.1 and 14.8 mS⋅cm−1 in pH2O of 0.16 and 0.12 atm, respectively, at 190°C. The scanning electron microscopy (SEM) analysis of the as-prepared CGP-PS composites shows that they are dense and free of pores. The stability of the CGP-PS composites is analyzed after the long-term electrical conductivity measurement in humidified atmosphere.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
