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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
Published on: September 20, 2012
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A-Site Ordered Double Perovskite with in Situ Exsolved Core-Shell Nanoparticles as Anode for Solid Oxide Fuel Cells
Nianjun Hou1,2, Tongtong Yao1,2, Ping Li1,2
1State Key Laboratory of Chemical Engineering (Tianjin University), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology , Tianjin University , Tianjin 300072 , China.
ACS Applied Materials & Interfaces
|January 23, 2019
Summary
A novel anode material for solid oxide fuel cells demonstrates excellent performance and resistance to carbon deposition. This development promises enhanced durability and efficiency for fuel cell applications using methane fuel.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Solid oxide fuel cells (SOFCs) require advanced anode materials for efficient and stable operation.
- Carbon deposition on anodes is a major challenge, particularly when using hydrocarbon fuels like methane.
- Developing robust anode materials with high catalytic activity is crucial for SOFC technology advancement.
Purpose of the Study:
- To synthesize and characterize a novel anode material for SOFCs with enhanced activity and resistance to carbon deposition.
- To investigate the structural and electrochemical properties of Co-Fe co-doped La0.5Ba0.5MnO3-δ.
- To evaluate the performance and long-term stability of an SOFC utilizing the developed anode with methane fuel.
Main Methods:
- Pechini method for synthesizing Co-Fe co-doped La0.5Ba0.5MnO3-δ.
- X-ray diffraction, thermogravimetric analysis, and high-resolution transmission electron microscopy for material characterization.
- Fabrication and testing of single SOFC cells using La0.8Sr0.2Ga0.8Mg0.2O3-δ electrolyte.
Main Results:
- Successful synthesis of a heterogeneous cubic-hexagonal structure with exsolved Co-Fe alloy-oxide core-shell nanoparticles.
- Demonstrated high catalytic activity of the exsolved nanoparticles on the layered double-perovskite supporter.
- Achieved maximum power densities of 1479 mW cm-2 (H2) and 503 mW cm-2 (CH4) at 850 °C.
- Exhibited stable power output for 200 hours with wet methane fuel, indicating high resistance to carbon deposition and coking.
Conclusions:
- The developed Co-Fe co-doped La0.5Ba0.5MnO3-δ anode exhibits excellent electrochemical performance and remarkable stability.
- The unique core-shell nanoparticle structure and strong anchoring on the perovskite support effectively prevent carbon deposition and coking.
- This material represents a significant advancement for SOFC anodes, particularly for direct hydrocarbon fuel utilization.
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