Chemically Stable Proton Conducting Doped BaCeO3 -No More Fear to SOFC Wastes
Date
2013-07-04
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Science and Business Media LLC
Abstract
Development 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.
Description
Keywords
Ceramics, Electronic materials, Fuel cells, Solid-state chemistry
Citation
Kannan, R., Singh, K., Gill, S., Fürstenhaupt, T., & Thangadurai, V. (2013). Chemically Stable Proton Conducting Doped BaCeO3 -No More Fear to SOFC Wastes. Scientific Reports, 3(1). https://doi.org/10.1038/srep02138