CO₂ Electrolysis of Tubular Type Solid Oxide Cells Using LaGaO₃ Electrolyte Thin Film Prepared By Dip-coating Method

Abstract

Micro-tubular type solid oxide electrolysis cell was prepared by using Ni-YSZ anode support tube and La_0.9Sr_0.1Ga_0.8Mg_0.2O_3−δ (LSGM) electrolyte film which was prepared by dip coating and co-sintering method. Application of the prepared tubular type solid oxide cells for CO₂ electrolysis was studied. It was found that CO₂ to CO was occurred selectively on tubular type solid oxide cells using LSGM thin film prepared by dip-coating method. However, comparing with the electrolysis current on planer type cells using LaGaO₃ based oxide electrolyte, that of tubular type cell was much smaller and this could be assigned to the low activity to CO₂ electrolysis and large IR loss of Ni-YSZ porous substrate which could be explained by re-oxidation of Ni.