Lanthanum-Gallium Electrolyte Membrane for Solid Oxide Fuel Cells
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Solution Overview
Problem
The development of a thin and dense electrolyte membrane for solid oxide fuel cells is hindered by the challenge of achieving uniform particle distribution and small particle diameters, which affects the membrane's conductivity and efficiency.
Innovation Solution
A lanthanum-gallium-based composite metal oxide electrolyte membrane with a specific color region of 0.39≤x≤0.40 and 0.35≤y≤0.36 based on the CIE x, y chromaticity distribution table is used, incorporating perovskite-type particles synthesized at a low temperature to achieve a dense and uniform membrane structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrolyte membranes are used, then manufacturing is easier, but the membrane cannot achieve thin and dense structure with uniform particle distribution
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of lanthanum, gallium, and dopant elements (Sr, Ca, Ba, Pb, Ti, Zr) within specific ranges (0.1-0.5, 0.1-0.5, and 0.01-0.1 respectively). This compositional parameter optimization enables uniform particle distribution and thin dense membrane structure while maintaining manufacturability through established ceramic processing techniques.
Solution Approach 2:
The patent employs composite materials by creating a multi-element doped lanthanum gallium oxide system (La1-x-yAxBGyO3-δ). The composite structure incorporates multiple cations (lanthanum, gallium, and dopants like strontium, calcium, barium, lead, titanium, zirconium) that work synergistically to achieve uniform particle distribution, small particle diameters, and high density while remaining compatible with conventional manufacturing processes.
2Reliability
If particle diameter is reduced to achieve dense membrane, then conductivity improves, but particle distribution uniformity becomes difficult to control
Solution Approach 1:
The patent uses parameter changes by optimizing the dopant concentration ranges (0.01-0.1 for A-site dopants, 0.1-0.5 for B-site gallium) to control particle growth kinetics. This precise parameter control enables simultaneous achievement of small particle diameters and uniform distribution, which enhances ion conductivity while maintaining manufacturing precision through standard ceramic processing.
Solution Approach 2:
The patent applies local quality by creating compositional gradients and heterogeneous doping distributions that promote uniform particle formation throughout the membrane. The specific dopant placement and concentration variations at local levels ensure consistent particle size and distribution while achieving high overall density and conductivity.
Data Source
AI summary
The present specification relates to an electrolyte membrane, a fuel cell including the same, a battery module including the fuel cell, and a method for manufacturing the electrolyte membrane.