Heat-Treated Halide Composition for Productive Solid Electrolytes
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Solution Overview
Problem
Current methods for producing halides lack high industrial productivity and efficiency in producing halides with high ionic conductivity, which is crucial for applications like solid electrolytes in lithium ion batteries.
Innovation Solution
A method involving the heat treatment of a mixture containing Y2O3, Sm2O3, NH4α, Liβ, and Caγ2 in an inert gas atmosphere, with specific temperature and time controls, to produce halides with enhanced ionic conductivity, allowing for mass production at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used for producing halides, then production cost is reduced, but industrial productivity and ionic conductivity are insufficient
Solution Approach 1:
The patent applies parameter changes by optimizing heat treatment temperature (400-650°C) and time (0.5-2 hours) to achieve high ionic conductivity halides. By changing the thermal processing parameters, the method improves productivity while maintaining cost-effectiveness through efficient energy utilization and reduced processing time.
Solution Approach 2:
The patent uses composite materials by combining multiple metal halides (Li, Ca, Y, Sm) in specific ratios to create a composite halide system. This composite approach enables high ionic conductivity while maintaining manufacturing efficiency, as the synergistic effects of different metal components enhance overall performance without requiring complex multi-step processes.
2Reliability
If heat treatment is performed to enhance ionic conductivity, then ionic conductivity is improved, but production time and energy consumption increase
Solution Approach 1:
The patent optimizes heat treatment parameters by conducting treatment at 400-650°C for 0.5-2 hours, which achieves high ionic conductivity (>6.0×10⁻¹⁰ S/cm) while minimizing production time. This parameter optimization ensures that the heat treatment process is both effective for improving reliability and efficient for reducing time loss.
Solution Approach 2:
The patent applies partial action by performing heat treatment for a limited duration (0.5-2 hours) at optimized temperatures, which is sufficient to achieve the required ionic conductivity without excessive energy consumption or time loss. This partial treatment approach avoids over-processing while meeting performance targets.
3Reliability
If multiple metal halides are combined to improve ionic conductivity, then ionic conductivity is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent creates a composite halide system combining Li, Ca, Y, and Sm metal halides in specific molar ratios. This composite material approach enhances ionic conductivity through synergistic effects while maintaining relatively simple manufacturing processes, as all components are mixed and heat-treated in a single unified process rather than requiring separate fabrication steps.
Solution Approach 2:
The patent applies local quality by assigning specific functional roles to different metal components within the composite halide. For example, Li provides high ionic conductivity, Ca enhances structural stability, Y and Sm contribute to phase formation and performance optimization. This functional differentiation at the component level achieves high overall performance without requiring complex manufacturing procedures.
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 halides with ionic conductivity higher than 6.0×10−10 S/cm at room temperature, suitable for use in solid electrolytes, particularly in all-solid-state lithium ion secondary batteries, while maintaining industrial productivity and cost-effectiveness.
Implementation Method 1
heat-treating a material mixture containing a compound containing Y, a compound containing Sm, NH4α, Liβ, and Caγ2 in an inert gas atmosphere
Data Source
AI summary
The production method of the present disclosure includes 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.