Fabrication of YSZ electrolyte using electrostatic spray deposition (ESD):I - a comprehensive parametric study

Nomura, Hiroshi; Parekh, Sandeep; Selman, J. Robert; Al-Hallaj, Said
January 2005
Journal of Applied Electrochemistry;Jan2005, Vol. 35 Issue 1, p61
Academic Journal
Electrostatic spray deposition (ESD) was applied to fabricate a thin-layer (~3 µm thickness) yttria-stabilized zirconia (YSZ) electrolyte on a solid oxide fuel cell (SOFC) anode substrate consisting of nickel-YSZ cermet. Reducing the thickness of a state-of-the-art electrolyte, and thereby reducing the cell internal IR drop, is a promising strategy to make the intermediate temperature SOFC (ITSOFC) operating at 600-800 °C possible. About 8 mol% YSZ colloidal solution in ethanol was sprayed onto the substrate anode surface at 250-300 °C by ESD. After sintering the deposited layer at 1250-1400 °C for 17-6 h, the cathode layer, consisting of lanthanum strontium manganate (LSM), was sprayed or brush coated onto the electrolyte layer. Performance tests on the cell were carried out at 800 °C to evaluate the electrolyte layer formed by ESD. With a 97 H2/3 H2O mixture and air as fuel and oxidant gas, respectively, open circuit voltage (OCV) was found to be close to the theoretical value.


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