Yb-Sc Doped Proton Conductor for Low-Resistance Electrolytes
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Solution Overview
Problem
Existing proton conductors, such as those represented by BaZr1-xMxO3-α, require further reduction in resistance to enhance proton conductivity.
Innovation Solution
A proton conductor with a chemical formula BaZr(1-x-y)YbxScyO3-δ is developed, where 0<x<0.5, 0<y<0.5, and (x+y)<0.5, to form a dense body with high proton conductivity, synthesized through methods like citric acid complex, solid-phase sintering, coprecipitation, or spray granulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dopant concentration is increased to enhance proton conductivity, then the material's proton conductivity improves, but the structural integrity and density may be compromised
Solution Approach 1:
The patent optimizes the dopant concentration parameters within specific ranges (0<x<0.5, 0<y<0.5, x+y<0.5) to achieve the balance between proton conductivity and structural integrity. The total dopant concentration (x+y) is constrained to maintain perovskite phase stability while providing sufficient doping for high proton conductivity.
Solution Approach 2:
The patent applies different dopant elements (Yb and Sc) at different local concentrations within the crystal structure. Yb preferentially occupies sites that enhance proton conductivity, while Sc promotes crystal grain growth, creating local compositional variations that optimize both conductivity and structural stability without compromising overall integrity.
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 proton conductor achieves higher proton conductivity compared to alternatives with similar dopant ratios, maintaining structural integrity and reducing resistance.
Implementation Method 1
Perovskite-type composite oxides represented by the chemical formula BaZr1-xMxO3-α are known as proton conductive electrolyte materials
Implementation Method 2
synthesized through methods like citric acid complex
Implementation Method 3
the addition of Sc to a proton conductor represented by the chemical formula BaZr1-xMxO3-α promotes the crystal growth during sintering
Implementation Method 4
synthesized through methods like coprecipitation
Implementation Method 5
synthesized through methods like spray granulation
Data Source
AI summary
A proton conductor of the present disclosure includes a compound represented by the chemical formula BaZr(1-x-y)YbxScyO3-δ. The chemical formula satisfies 0<x<0.5, 0 <y<0.5, (x+y)<0.5, and 0<δ<0.5.