Developing extraordinary electrocatalytic performance of Fe-based cathode catalysts for solid oxide fuel cells by fluorine doping

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-03-08 DOI:10.1016/j.jeurceramsoc.2025.117357

Zunxing Chu , Chuangming Yang , Jianing Shao , Tiezhu Ma , Tian Xia , Hui Zhao , Qiang Li

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Abstract

The development of a highly active cathode materials for solid oxide fuel cells (SOFCs) is still a major problem. Herein, we report a fluorine doped Bi_0.8Ca_0.2FeO_2.95–δF_0.05 (BCFF) oxide as promising cathode electrocatalysts for SOFCs. The F doping strategy shows enhanced electrocatalytic activity for the oxygen reduction reaction (ORR) and CO₂ tolerance of the Bi_0.8Ca_0.2FeO_3–δ cathode. BCFF cathode possesses the excellent electrochemical performance, as evidenced by a lower polarization resistance of 0.07 Ω cm² at 700 ℃. The single cell delivers a maximum power density of 826, 978, and 1260 mW cm⁻² at 700, 750 and 800 ℃, respectively. This enhanced ORR activity is due to the fact that the high electronegativity of F indirectly adjusts the electron density of adjacent O atoms, enabling BCF to release more lattice oxygen and provide more oxygen vacancies. This study provides an effective strategy for the development of the cathode catalysts for SOFCs.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.