Related Experiment Video
Updated: Aug 11, 2025
12:30
Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
Published on: May 26, 2019
7.3K
Cobalt-Free Double Perovskite Oxide as a Promising Cathode for Solid Oxide Fuel Cells
Binze Zhang1, Shaowei Zhang1, Hairui Han1
1CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, P. R. China.
ACS Applied Materials & Interfaces
|February 3, 2023
Summary
Gallium doping in PrBaFe2O5+δ enhances cathode performance for solid oxide fuel cells. This modification improves oxygen reduction and power density, offering a promising material for clean energy applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Conversion
Background:
- Double perovskite oxides are crucial cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs).
- PrBaFe2O5+δ shows potential but requires performance optimization for better electrochemical activity.
Purpose of the Study:
- To investigate the impact of gallium (Ga) doping on the physicochemical and electrochemical properties of PrBaFe2O5+δ.
- To evaluate the performance enhancement of Ga-doped PrBaFe2O5+δ (PBFGx) as a cathode material for IT-SOFCs.
Main Methods:
- Synthesis of PrBaFe2-xGaxO5+δ (PBFGx) with varying Ga content (x = 0.05, 0.1, 0.15).
- Analysis of phase structures, valence states, oxygen vacancies, and surface exchange kinetics (kchem).
- Electrochemical impedance spectroscopy and single-cell performance testing of anode-supported SOFCs.
Main Results:
- PBFG0.1 demonstrated a 19% increase in oxygen surface exchange coefficient (kchem) at 750 °C.
- Interfacial polarization resistance decreased by 28% for PBFG0.1 at 800 °C.
- Peak power density increased by 36% to 856 mW cm-2 at 800 °C, with good 100-hour stability.
Conclusions:
- Gallium doping significantly enhances the oxygen reduction reaction kinetics and electrochemical performance of PrBaFe2O5+δ cathodes.
- PBFG0.1 is a promising cathode material for high-performance and stable IT-SOFCs.
- Enhanced oxygen dissociation and vacancy concentration are key factors for improved performance.
Related Concept Videos
03:12Batteries and Fuel Cells
27.8K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.8K
02:47Voltaic/Galvanic Cells
58.1K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
58.1K