Abstract
As one of promising technologies for hydrogen production and valuable chemical production, protonic ceramic electrochemical cells (PCECs) work at relatively low temperatures (400-600oC), due to high ionic conductivity and low activation energy. However, some undesired structural morphologies and defects presenting in the electrolyte layer during fabrication of PCECs, such as relatively small grain sizes, pinholes, and poor electrolyte/electrode interfaces, presenting detrimental effects on electrochemical performance and durability. PCECs are conventionally fabricated from proton conducting precursor powders, which are usually synthesized by solid state reaction (SSR) method, especially for large quantity fabrication. Thus, the properties and quality of electrolyte precursor powders are crucial for cell performance. Herein, we investigate the influence of fabrication conditions for electrolyte precursors on both manufacturing process and consequential electrochemical performance of PCECs. The present study sheds a light on the discrepancies on the PCEC performance reported in the literature and paves a way for scale-up of PCEC technology.
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