Browsing by Author "Kannan, Ramaiyan"
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- ItemOpen AccessChemically Stable Proton Conducting Doped BaCeO3 -No More Fear to SOFC Wastes(Springer Science and Business Media LLC, 2013-07-04) Kannan, Ramaiyan; Singh, Kalpana; Gill, Sukhdeep; Fürstenhaupt, Tobias; Thangadurai, VenkataramanDevelopment of chemically stable proton conductors for solid oxide fuel cells (SOFCs) will solve several issues, including cost associated with expensive inter-connectors and long-term durability. Best known Y-doped BaCeO3 (YBC) proton conductors-based SOFCs suffer from chemical stability under SOFC by-products including CO2 and H2O. Here, for the first time, we report novel perovskite-type Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3?? by substituting Sr for Ba and co-substituting Gd + Zr for Ce in YBC that showed excellent chemical stability under SOFC by-products (e.g., CO2 and H2O) and retained a high proton conductivity, key properties which were lacking since the discovery of YBCs. In situ and ex- situ powder X-ray diffraction and thermo-gravimetric analysis demonstrate superior structural stability of investigated perovskite under SOFC by-products. The electrical measurements reveal pure proton conductivity, as confirmed by an open circuit potential of 1.15?V for H2-air cell at 700°C and merits as electrolyte for H-SOFCs.
- ItemOpen AccessSynthesis and Characterisation of Ceramic Proton Conducting Perovskite-type Multi-element - Doped Ba0.5Sr0.5Ce1-x-y-zZrxGdyYzO3-δ (0 < x < 0.5; y = 0, 0.1, 0.15; z = 0.1, 0.2)(Elsevier, 2016) Singh, Kalpana; Kannan, Ramaiyan; Thangadurai, Venkataraman