Ce0.7Bi0.3O1.85-(La0.8Sr0.2)0.9MnO3-Y0.16Zr0.84O1.92 ternary cathodes for low temperature solid oxide fuel cells. (1st February 2018) - Shang, Lei
Abstract: The ternary cathodes of Ce0.7 Bi0.3 O1.85 -(La0.8 Sr0.2 )0.9 MnO3 -Y0.16 Zr0.84 O1.92 (BDC-LSM-YSZ) are fabricated through infiltration for low temperature solid oxide fuel cells. The infiltrated BDC particles are 10–20 nm in size and cover on LSM and YSZ particles. The 10 wt% and 20 wt% BDC-LSM-YSZ samples show a large peak for the desorption of surface oxygen species and a large peak for the evolution of lattice oxygen, reflecting their good redox property. 0.1BDC-LSM-YSZ cell and 0.2BDC-LSM-YSZ cell give the power density at 0.6 V of 387.8 and 521.7 mWcm −2 at 600 °C, which is 3.7 and 4.9 times higher than that of LSM-YSZ cell, respectively. 0.1BDC-LSM-YSZ cell and 0.2BDC-LSM-YSZ cell exhibit low ohmic resistance and low total polarization resistance. The DRT analysis reveals that charge transfer reaction and surface diffusion are greatly accelerated on the BDC-LSM-YSZ cathodes. Highlights: The ternary cathodes of Ce0.7 Bi0.3 O1.85 (BDC)-infiltrated LSM-YSZ are fabricated. BDC-LSM-YSZ sample shows better oxygen desorption property than LSM-YSZ sample. BDC-infiltrated LSM-YSZ cell shows higher performance than LSM-YSZ cell at 600 °C. BDC-LSM-YSZ cathode greatly accelerates charge transfer and surface diffusion.