Thermodynamic NiO exsolution for durable and efficient cobaltfree cathodes in proton-conducting solid oxide fuel cellsOA
Developing high-performance cathodes is critical to advancing proton-conducting solid oxide fuel cells(PCFCs).However,their practical application remains constrained by sluggish oxygen reduction reaction(ORR)kinetics and the instability of nanoscale catalytic features in oxidizing environments.Here,a cobalt-free nanocomposite cathode is rationally engineered via a Mo-induced iontopological strategy based on the perovskite oxide BaCe_(0.26)Ni_(0.1)Fe_(0.64)O_(3−δ)(BCNF10).Through the introduction of B-site Mo,the spontaneous exsolution of highly dispersed NiO nanoparticles significantly enhances surface oxygen exchange kinetics and leads to the formation of stable and well-defined heterointerfaces.The single cell with the optimized composite cathode Ba_(0.95)Ce_(0.25)Ni_(0.1)Mo_(0.05)Fe_(0.6)O_(3−δ)(BCNMF10)achieves an outstanding maximum power density(MPD)of 2002 mW·cm^(−2)at 700℃,accompanied by excellent long-term operational durability and humidity tolerance.First-principles calculations further elucidate the underlying mechanism,revealing a thermodynamically favorable,defect-mediated pathway for NiO formation and underscore the crucial role of dopant‒defect interactions in tailoring surface reactivity.This work provides a robust and scalable framework for the development of durable,high-efficiency cathodes for next-generation PCFCs.
Bofeng Wan;Tao Liu;Yinlin Chang;Min Fu;Zetian Tao;Hong Zhou
School of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,ChinaSchool of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,ChinaSchool of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,ChinaSchool of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,ChinaSchool of Resources,Environment and Safety Engineering,University of South China,Hengyang 421001,ChinaThe First Affiliated Hospital,Department of Radiology,Hengyang Medical School,University of South China,Hengyang 421001,China Hunan Provincial Key Laboratory of Multi-omics and Artificial Intelligence of Cardiovascular Diseases,University of South China,Hengyang 421001,China
信息技术与安全科学
ion topology engineeringproton conductorcobalt-free cathodessolid oxide fuel cells
《Journal of Advanced Ceramics》 2026 (1)
P.67-76,10
supported by the National Natural Science Foundation of China(No.22479072)the Innovation Platform and Talent Program(No.2023TP1047)the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province(No.18KJA430017).
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