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Synergistic Dual-Site Modulation Enabling High-Performance Cobalt-Free Perovskite Cathodes for

Xueyang Li1, Zhengtao Chen1, Yifan Liu1

  • 1Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangzhou Higher Education Mega Center, Guangdong University of Technology, Guangzhou, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|January 17, 2026
PubMed
Summary
This summary is machine-generated.

A new cobalt-free perovskite oxide, Ba$_{0.8}$La$_{0.2}$Fe$_{0.95}$Y$_{0.05}$O$_{3-δ}$ (BLFY), was developed for solid oxide fuel cells (SOFCs). This material shows excellent performance and stability, offering a cost-effective alternative to cobalt-based cathodes.

Keywords:
cobalt‐freedual‐site engineeringoxygen reduction reactionperovskite cathodessolid oxide fuel cells

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • Solid oxide fuel cells (SOFCs) are efficient energy technologies.
  • Cobalt-based perovskites are common SOFC cathodes but are costly and unstable.
  • Developing cost-effective and stable cobalt-free alternatives is crucial for SOFC commercialization.

Purpose of the Study:

  • To design and synthesize a novel cobalt-free perovskite oxide cathode material for SOFCs.
  • To enhance structural stability, oxygen vacancy concentration, and oxygen-ion transport kinetics.
  • To evaluate the electrochemical performance and long-term durability of the new material.

Main Methods:

  • Synergistic substitution of La and Y in a BaFeO$_{3-δ}$ framework to create Ba$_{0.8}$La$_{0.2}$Fe$_{0.95}$Y$_{0.05}$O$_{3-δ}$ (BLFY).
  • Comprehensive physicochemical characterization (structure, defects, ion mobility).
  • Electrochemical performance testing (area-specific resistance, power density) and stability assessments.

Main Results:

  • BLFY exhibits a single-phase cubic perovskite structure with high oxygen vacancy concentration and mobility.
  • Achieved ultralow area-specific resistance (0.07 Ω·cm²) and high peak power density (1280 mW·cm⁻²) at 600°C.
  • Outperformed singly modified counterparts and benchmark cobalt-based cathodes, demonstrating excellent thermal and operational stability.

Conclusions:

  • Dual-site synergistic design is effective for creating high-performance cobalt-free perovskite cathodes.
  • BLFY presents a promising, cost-efficient, and durable cathode material for intermediate-temperature SOFCs.
  • This work paves the way for advanced SOFC technology with improved sustainability.