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Rational Design of Mixed Ionic and Electronic Conducting Solid Oxide Fuel Cell Anode Materials

Rational Design of Mixed Ionic and Electronic Conducting Solid Oxide Fuel Cell Anode Materials. Sr 0.85 Na 0.1 Ti 0.8 Nb 0.2 O 3. Scientific Achievement

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Rational Design of Mixed Ionic and Electronic Conducting Solid Oxide Fuel Cell Anode Materials

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  1. Rational Design of Mixed Ionic and Electronic Conducting Solid Oxide Fuel Cell Anode Materials Sr0.85Na0.1Ti0.8Nb0.2O3 Scientific Achievement Computational predictions and experimental validations confirm improved mixed ionic/electronic conductivity in mixed p- and n-doping perovskiteoxides Significance and Impact Gain fundamental understanding in conducting mechanism of SrTiO3-based materials and provide guidance on rational design of new electrode materials Research Details • Slow oxide ion and Sr2+ diffusion in n-doped SrTiO3hampers its equilibration at low Po2that is needed for high electrical conductivity • First principles calculation indicates that mixed p- and n-type doping, independent of the doping site in SrTiO3, leads to enhanced mixed ionic and electronic conductivity • Enhanced electrical conductivity of Na/K (p-type) and La/Nb (n-type) doped SrTiO3 have been achieved experimentally Sr0.9Na0.1Ti0.8Nb0.2O3 Sr0.9Na0.1Ti0.8Nb0.2O2.95 Sr0.9Na0.1Ti0.8Nb0.2O2.90 Sr0.9Na0.1Ti0.8Nb0.2O2.85 Density of states of Na-doped SrTi0.8Nb0.2O3 G. Xiao, S. Nuansaeng, L. Zhang, S. Suthirakun, A. Heyden, H.C. zurLoye and F. Chen, Journal of Material Chemistry A, 2013, 1, 10546; S. Suthirakun, G. Xiao, S.C. Ammal, F. Chen, H.C. zurLoye and A. Heyden, Journal of Power Sources, 2014, 245, 875. Electrical conductivity of Na/K-doped SrTi0.8Nb0.2O3 in H2 Work was performed at University of South Carolina

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