Improving cathode electrocatalysis via Co-substitution-driven interstitial transport for proton-conducting solid oxide fuel cells

被引：0

作者：

Hu, Jiani ^{[1
]}

Ma, Lei ^{[1
]}

Jiang, Wang ^{[1
]}

Xie, Zhangjin ^{[1
]}

Wu, Fang ^{[1
]}

Hou, Jie ^{[1
]}

机构：

[1] Univ South China, Hengyang 421001, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2025年 / 319卷

基金：

中国国家自然科学基金;

关键词：

Proton conducting solid oxide fuel cells; Interstitial oxygen species; Proton migration; Ionic transport; CERAMIC FUEL; SYSTEM LA2-XSRXNIO4+DELTA; COMPOSITE CATHODE; PERFORMANCE; SPECTROSCOPY; DESIGN; STATE;

D O I：

10.1016/j.mseb.2025.118372

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Strategic engineering of B-site coordination environment in K2NiF4-type oxides presents a rational pathway to optimize electrocatalytic functionality. Herein, Co substitution in La1.2Sr0.8NiO4+delta (LSNO) induces structural reorganization that accommodates excess interstitial oxygen species, enabling dual enhancement of ionic transport with 30-fold enhanced oxygen diffusion and 3.5-11.1-fold improved proton migration. The NiOBaZr0.1Ce0.7Y0.2O3-delta|BaZr0.1Ce0.7Y0.2O3-delta|La1.2Sr0.8Ni0.5Co0.5O4+delta (LSNCO) cell demonstrates exceptional electrochemical performance with the power density of 1698 mW cm- 2 and polarization resistance of 0.056 Omega cm2 at 700 degrees C, outperforming both LSNO counterpart and reported Ln2NiO4-based cathodes. The synergistic integration of exceptional power generation, optimized interfacial polarization, and excellent operational stability establishes LSNCO as a benchmark cathode material for proton conducting solid oxide fuel cells. This study systematically validates a Co-mediated B-site coordination engineering strategy in K2NiF4-type lattices, providing a generalized framework for designing high electrocatalytically active electrodes with coupled ionic transport channels.

引用

页数：7

共 48 条

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