Perovskite Air Electrode Material for Durable High-Temperature Electrolysis
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Solution Overview
Problem
Existing electrode materials for high-temperature electrolysis, particularly air electrodes, suffer from suboptimal performance and service life.
Innovation Solution
A compound material with a perovskite structure, such as M2Ni1−xCoxO4+δ or La1-yMyNi1−xCoxO4+δ, where M represents Pr and/or Nd, is used, with specific x and δ values, and processed to achieve improved performance and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode materials are used for high-temperature electrolysis, then the basic electrolysis function is achieved, but the performance and service life are suboptimal
Solution Approach 1:
The patent employs a composite perovskite material structure with general formula A1-x-yBxWyO3-δ, combining multiple metal elements (Fe, Co, Ni, Cu, Mn, Cr) in specific ratios to create a composite electrode material that simultaneously achieves high performance and long service life through synergistic effects of different metallic components
Solution Approach 2:
The patent systematically varies compositional parameters (x, y values representing metal ratios), structural parameters (crystalline phase, particle size 0.5-1 μm), and operational parameters (temperature 700-1000°C) to optimize the electrode material's performance and durability characteristics
2Productivity
If higher current density is achieved through material optimization, then productivity improves, but material degradation may accelerate
Solution Approach 1:
The patent optimizes the compositional parameters (x and y values in the formula A1-x-yBxWyO3-δ) to achieve a balance where the electrode maintains high current density (0.4 A/cm²) while resisting degradation, through precise control of metal ratios and crystalline structure
Solution Approach 2:
The patent creates different functional zones within the electrode material by incorporating multiple metals with different properties at specific concentrations, where each metal element contributes specific local properties that collectively enhance both productivity and reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed materials exhibit enhanced performance and extended service life in high-temperature electrolysis applications, demonstrated by increased current density and reduced degradation rates.
Implementation Method 1
Electrolysis is a process in which electric current forces a redox reaction. It is used for example to extract metals or to produce substances that would be more expensive or very difficult to obtain using purely chemical processes.
Implementation Method 2
Electrolysis is a process in which electric current forces a redox reaction.
Data Source
AI summary
A material for an electrode, the material for as well as a method of making the material for an electrode comprising or consisting of a compound of formula (1)M2Ni1−xCoxO4+δand/or of formula (2)La1−yMyNi1−xCoxO4+δwhere M represents Pr and/or Nd, 0.0≤x≤0.2, 0.25≤δ≤0.3 and 0<y≤10 0.5.