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用于质子陶瓷燃料电池的高性能BaCoFeMYO（M = Mg，Zr）正极的氧还原动力学

Oxygen reduction kinetics of high performance BaCoFeMYO (M = Mg, Zr) positrode for protonic ceramic fuel cells.

作者信息

Sumi Hirofumi, Watanabe Konosuke, Sharma Aman, Fujioka Masaya, Shimada Hiroyuki, Mizutani Yasunobu, Alam Md Saiful, Kagomiya Isao

机构信息

Innovative Functional Materials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Aichi, Japan.

Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Aichi, Japan.

出版信息

Commun Chem. 2025 Mar 8;8(1):71. doi: 10.1038/s42004-025-01468-4.

DOI:10.1038/s42004-025-01468-4
PMID:40057658
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11890574/
Abstract

Protonic ceramic fuel cells (PCFCs) should exhibit high performance at intermediate temperatures in the range of 400-600 °C. To reduce the operating temperature, more active air electrodes (positrodes) are needed. In the present work, BaCoFeMgYO (BCFMY) is investigated as a positrode material for application in PCFCs as well as solid oxide fuel cells (SOFCs). For SOFCs, the polarization resistance ascribed to the oxygen reduction reaction is proportional to p (p: oxygen partial pressure), suggesting that the rate-determining process is the charge transfer on the mixed ionic-electronic conductors. For PCFCs, this polarization resistance is proportional to p, suggesting that the rate-determining process is the oxygen dissociation. The total polarization resistance for the PCFCs using the BCFMY positrode is 0.066 Ωcm at 600 °C, lower than that using the BaCoFeZrYO (BCFZY) positrode. The higher oxygen nonstoichiometry of BCFMY promotes the oxygen dissociation process on the PCFC positrode surface.

摘要

质子陶瓷燃料电池（PCFC）在400-600 °C的中温范围内应具有高性能。为了降低工作温度，需要更具活性的空气电极（正极）。在本工作中，研究了BaCoFeMgYO（BCFMY）作为一种正极材料，用于PCFC以及固体氧化物燃料电池（SOFC）。对于SOFC，归因于氧还原反应的极化电阻与p（p：氧分压）成正比，这表明速率决定过程是混合离子电子导体上的电荷转移。对于PCFC，该极化电阻与p成正比，这表明速率决定过程是氧解离。使用BCFMY正极的PCFC在600 °C时的总极化电阻为0.066 Ωcm，低于使用BaCoFeZrYO（BCFZY）正极的情况。BCFMY较高的氧非化学计量比促进了PCFC正极表面的氧解离过程。

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本文引用的文献

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Electrokinetic Proton Transport in Triple (H /O /e ) Conducting Oxides as a Key Descriptor for Highly Efficient Protonic Ceramic Fuel Cells.三重（H⁺/O²⁻/e⁻）传导氧化物中的电动质子传输作为高效质子陶瓷燃料电池的关键描述符
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