Comparative Studies of Oxide, Protonic and Hybrid Ions Conduction for Low Temperature Solid Oxide Fuel Cell

Abstract

In present study novel electrolyte materials for oxide, protonic and hybrid ions conductors LN-Ca0.1Sm0.1Ce0.8O3–δ-Y2O3, LN-Ba0.1Sr0.1Ce0.8O3–δ-Y2O3, and LN-Ba0.1Sm0.1Ce0.8O3–δ- Y2O3 were synthesized via cost effective co-precipitation technique. Effect of alkali carbonates considered to diffuse the hydrogen ion and enhances the ionic conduction. Electrochemical properties were investigated by fuel cell performance and DC 4-probe method under air and hydrogen atmosphere. Experimentally structure, morphology and IR behavior characterized by XRD, SEM and FTIR respectively. Average crystallite size was calculated in the range of 27 to 98 nm by X-ray diffraction. Particle size was observed in the range of 40 to 100nm. Maximum conductivity achieved 0.19 Scm-1 for LN-Ba0.1Sm0.1Ce0.8O3–δ-Y2O3 that is greater than comparatively conventional electrolyte. Maximum power density 752mWcm-2 with current density 2010 mAcm-2 at 1.06 V for hybrid ion conductor taken into account by providing hydrogen fuel. Appearance of water during fuel cell testing on both ends of cell (anode/cathode) verify that dual ion conducts through this electrolyte material. Degradation and stability also found through durability.