Cu-Doped BaZrO3 Proton Conductor for Sinterability-Conductivity Balance
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Solution Overview
Problem
Existing proton conductors, such as Yb-substituted BaZrO3 with 1.0 mol% CuO, exhibit improved sinterability but reduced proton conductivity, limiting the performance of proton-conducting ceramic fuel cells (PCFCs).
Innovation Solution
A proton conductor with a chemical formula Ba a Zr 1-x-y Yb x Cu y O 3-δ, where 0.95 ≤ a ≤ 1.05, 0.1 ≤ x ≤ 0.4, 0.01 < y < 0.20, and 0 < δ ≤ 0.65, is developed to optimize the substitution amount of Cu, enhancing proton conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If CuO is added to Yb-substituted BaZrO3 to improve sinterability, then sintering performance is improved, but proton conductivity is reduced
Solution Approach 1:
The patent optimizes the CuO addition amount to a specific range (0.01-0.05 mol ratio relative to BaZrO3) to achieve the best balance between sinterability and proton conductivity. This parameter optimization resolves the contradiction by identifying the precise dosage that provides sufficient sintering aid while minimizing the negative impact on proton conductivity.
Solution Approach 2:
The patent creates a composite proton conductor material combining Yb-substituted BaZrO3 with controlled CuO addition. This composite approach leverages the sintering促进作用 of CuO while maintaining the high proton conductivity of the base material, effectively resolving the contradiction between ease of manufacture and reliability.
2Ease of manufacture
If the substitution amount of Cu is increased to further improve sinterability, then sintering performance is enhanced, but proton conductivity deteriorates further
Solution Approach 1:
The patent establishes an optimal range for Cu substitution amount (0.01-0.05 mol ratio) rather than using a fixed value. This parameter range optimization resolves the contradiction by defining the precise boundary where sintering improvement is maximized while proton conductivity degradation is minimized.
Solution Approach 2:
The patent applies partial action by adding a small, controlled amount of CuO (0.01-0.05 mol ratio) rather than excessive amounts. This partial addition is sufficient to improve sintering performance while avoiding the excessive CuO that would cause significant proton conductivity deterioration.
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 optimized proton conductor achieves higher proton conductivity, leading to increased power generation efficiency and output in PCFCs.
Implementation Method 1
a solid oxide having proton conductivity for the electrolyte constituting the electrolyte film
Data Source
Figure 1~4
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Figure 6
AI summary
A proton conductor of the present disclosure contains a compound represented by a chemical formula BaaZr1-x-yYbxCuyO3-δ. In the chemical formula, 0.95 ≤ a ≤ 1.05, 0.1 ≤ x ≤ 0.4, 0.01 < y < 0.20, and 0 < δ ≤ 0.65 are satisfied. An electrolyte film 10 of the present disclosure contains the proton conductor of the present disclosure.