Abstract
The high-performance single-phase semiconductor materials with higher ionic conductivity have drawn substantial attention in fuel cell applications. Semiconductor materials play a key role to enhance ionic conductivity subsequently promoting low temperature solid oxide fuel cell (LT-SOFC) research. Herein, we proposed a semiconductor Co doped Y2O3 (YCO) with different molar ratios, which may easily access the ionic conductivity and electrochemical performances at low operating temperatures. The resulting fabricated fuel cell 10% Co doped Y2O3 (YCO-10) device exhibits high conductivity ∼0.16 S.cm−1 and a higher power density of 856 mW.cm−2 along with 1.10 OCV at 530 °C. The electrochemical impedance spectroscopy (EIS) reveals that YCO-10 electrolyte based SOFC delivers the least ohmic resistance 0.11–0.16 Ω.cm2 at 530-450 °C. Electrode polarization resistance of the constructed fuel cell device reduces from 0.28 Ω.cm2 to 0.59 Ω.cm2 in H2/air environment with the increase of temperature from 450 °C to 530 °C. This work suggests that YCO-10 can be a promising alternative electrolyte, owing to its high performance and enhanced ionic conductivity for LT-SOFC.
Published Version
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