Halide Solid Electrolyte Heat Treatment for Scalable Ionic Conductivity
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Solution Overview
Problem
Current methods for producing halides lack high industrial productivity, making them inefficient for mass production and increasing costs.
Innovation Solution
A heat treatment method involving a mixture of Y-containing and Sm-containing compounds, NH4, Li, and Ca in an inert gas atmosphere, allowing for the production of halides with high ionic conductivity, where the compounds include Y2O3 and Sm2O3, and the process can be optimized by varying temperature and time to maintain product stability and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used for producing halides, then production can be carried out with existing processes, but industrial productivity is low and mass production efficiency is poor
Solution Approach 1:
The patent applies parameter changes by optimizing heat treatment temperature (400-650°C) and time (1-24 hours) to achieve high ionic conductivity halides. This systematic parameter optimization enables efficient mass production while maintaining product quality, directly resolving the contradiction between industrial productivity and manufacturing efficiency
Solution Approach 2:
The patent uses composite material formulation with specific ratios of Li (0.8-2.0), Y (0.1-0.5), Sm (0.1-0.5), and Ca (0.05-0.2) to produce halide solid electrolytes with superior ionic conductivity. This composite approach enables scalable production with consistent high performance, improving both productivity and manufacturing efficiency
2Reliability
If heat treatment is performed at higher temperature for longer time, then ionic conductivity increases, but production time increases and productivity decreases
Solution Approach 1:
The patent optimizes the parameter combination of temperature (400-650°C) and time (1-24 hours) to achieve the best balance between ionic conductivity and production time. This optimized parameter set enables high ionic conductivity (≥6.0×10^-10 S/cm) while maintaining reasonable production cycles, resolving the contradiction between reliability and productivity
Solution Approach 2:
The patent performs preliminary mixing and preparation of halide precursors before heat treatment, ensuring optimal reactant distribution. This preliminary action reduces the required heat treatment time while maintaining high ionic conductivity, effectively resolving the time-conductivity trade-off
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 method achieves high industrial productivity and produces halides with ionic conductivity higher than or equal to 6.0×10^-10 S/cm at room temperature, suitable for use in solid electrolyte materials like all-solid-state lithium ion secondary batteries.
Implementation Method 1
a heat treatment step of heat-treating a material mixture containing a compound containing Y, a compound containing Sm, NH4, Li, and Ca in an inert gas atmosphere
Data Source
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AI summary
The production method of the present disclosure includes a heat treatment step of heat-treating a material mixture containing a compound containing Y, a compound containing Sm, NH4α, Liβ, and Caγ2 in an inert gas atmosphere. The compound containing Y is at least one selected from the group consisting of Y2O3 and Yδ3, and the compound containing Sm is at least one selected from the group consisting of Sm2O3 and Smε3. The material mixture contains at least one selected from the group consisting of Y2O3 and Sm2O3, and α, β, γ, δ, and ε are each independently at least one selected from the group consisting of F, Cl, Br, and I.