Preparation and Electrochemical Properties of Cathode Materials Ln(2-x) Y (x) CuO(4+δ) for Solid Oxide Fuel Cell.
Preparation and Electrochemical Properties of Cathode Materials Ln(2-x) Y (x) CuO(4+δ) for Solid Oxide Fuel Cell.
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固体氧化物燃料电池正极材料Ln(2-x)Y(X)CuO(4δ)的制备及电化学性质
DOI:
10.1021/acsomega.2c06808
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发表时间:
2023-02-14
期刊:
影响因子:
4.1
通讯作者:
Xue, Liangmei
中科院分区:
文献类型:
--
作者:
Ni, Yang;Li, Songbo;An, Shengli;Du, Xu;Xue, Liangmei
Ln2–xYxCuO4+δ (Ln = Pr, Nd, Sm; x = 0, 0.025, 0.05, 0.1) cathode materials were synthesized using a sol–gel method and calcination at 1000 °C for 24 h. The phase structure, coefficient of thermal expansion (CTE), electrical conductivity, and electrochemical impedance of cathode materials were characterized. X-ray diffraction (XRD) patterns show that the cell volume of each cathode material decreases with the increase in the Y3+ doping amount and has good chemical compatibility with the Sm0.2Ce0.8O1.9 electrolyte. The thermal expansion test shows that the increase in Y3+ doping reduces the average CTE of Ln2CuO4+δ. The conductivity test shows that Y3+ doping increases the conductivity of Ln2CuO4+δ, and Pr1.975Y0.025CuO4+δ has the highest conductivity of 256 S·cm–1 at 800 °C. The AC impedance test shows that Y3+ doping reduces the polarization impedance of Ln2CuO4+δ, and Pr1.9Y0.1CuO4+δ has a minimum area-specific resistance (ASR) of 0.204 Ω·cm2 at 800 °C. In conclusion, Pr1.975Y0.025CuO4+δ has the best performance and is more suitable as a cathode material for a solid oxide fuel cell (SOFC).
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