Article: Characterisation of Bi doped YBaCo2O5+δ layered perovskite oxide as a cathode for Intermediate-temperature solid oxide fuel cell Journal: International Journal of Computational Materials Science and Surface Engineering (IJCMSSE) 2021 Vol.10 No.2 pp.88 - 100 Abstract: A layered perovskite oxide Y0.9Bi0.1BaCo2O5+δ (YBBCO) was evaluated as an intermediate-temperature solid oxide fuel cell (IT-SOFC) cathode material. The YBBCO shows a P4/mmm tetragonal structure with 3 × 3 × 1 superstructure. Its electrical conductivity attained 91-76 S cm-1 at 600-800°C, which is high enough to provide sufficient electronic transfer for cathode oxygen reduction. At 100-900°C, the thermal expansion coefficient (TEC) of the YBBCO was 16.8 × 10-6 K-1, consistent well with common IT electrolytes like Sm0.2Ce0.8O1.9 (SDC). The polarisation resistance (Rp) of the YBBCO cathode was 0.088 Ω cm2 at 700°C, and the peak power density of the YBBCO cathode cell attained 252 mW cm-2 at the same temperature. Excellent electrochemical performance, sufficient conductivity, and appropriate TEC indicate the great potential of the YBBCO for application in IT-SOFC cathode. Inderscience Publishers - linking academia, business and industry through research

Title: Characterisation of Bi doped YBaCo₂O_5+δ layered perovskite oxide as a cathode for Intermediate-temperature solid oxide fuel cell

Authors: He Wang; Jingsheng Xu; Zhaoyuan Song; Xiaogang Su; Dapeng Wu; Leilei Zhang

Addresses: College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China ' College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China ' College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China ' College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China ' College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China ' College of Sciences, Liaoning Petrochemical University, Fushun, 113001, China

Abstract: A layered perovskite oxide Y_0.9Bi_0.1BaCo₂O_5+δ (YBBCO) was evaluated as an intermediate-temperature solid oxide fuel cell (IT-SOFC) cathode material. The YBBCO shows a P4/mmm tetragonal structure with 3 × 3 × 1 superstructure. Its electrical conductivity attained 91-76 S cm^-1 at 600-800°C, which is high enough to provide sufficient electronic transfer for cathode oxygen reduction. At 100-900°C, the thermal expansion coefficient (TEC) of the YBBCO was 16.8 × 10^-6 K^-1, consistent well with common IT electrolytes like Sm_0.2Ce_0.8O_1.9 (SDC). The polarisation resistance (R_p) of the YBBCO cathode was 0.088 Ω cm² at 700°C, and the peak power density of the YBBCO cathode cell attained 252 mW cm^-2 at the same temperature. Excellent electrochemical performance, sufficient conductivity, and appropriate TEC indicate the great potential of the YBBCO for application in IT-SOFC cathode.

Keywords: IT-SOFC; cobalt-based layered perovskite; thermal expansion; electrical conductivity; polarisation resistance.

DOI: 10.1504/IJCMSSE.2021.118499

International Journal of Computational Materials Science and Surface Engineering, 2021 Vol.10 No.2, pp.88 - 100

Received: 23 Dec 2020
Accepted: 18 Apr 2021
Published online: 27 Oct 2021 *

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Title: Characterisation of Bi doped YBaCo2O5+δ layered perovskite oxide as a cathode for Intermediate-temperature solid oxide fuel cell

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Title: Characterisation of Bi doped YBaCo₂O_5+δ layered perovskite oxide as a cathode for Intermediate-temperature solid oxide fuel cell