Wet-Milled Sulfide Solid Electrolyte With Nonpolar Solvent Recovery
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Solution Overview
Problem
Existing methods for synthesizing sulfide-based solid electrolytes face challenges such as high solvent usage, additional processing costs, and difficulties in synthesizing materials with low reaction energy, as well as issues with powder adherence and heat generation during milling.
Innovation Solution
A method involving the use of nonpolar solvents and milling balls to synthesize sulfide-based solid electrolytes, followed by filtration and heat-treatment, which prevents solvent reaction and adherence, enabling efficient synthesis with high lithium ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wet method is used to synthesize solid electrolyte by adding precursors to a polar solvent, then mass production is enabled, but a large amount of solvent is required and additional processes and costs to remove the solvent are incurred
Solution Approach 1:
The patent changes the key parameter from using polar solvents to using nonpolar solvents with low boiling points. This parameter change enables the solvent to be removed more easily through simple evaporation or filtration, reducing the quantity of solvent needed and eliminating complex removal processes while maintaining mass production capability
Solution Approach 2:
The patent employs a nonpolar solvent that can be easily evaporated or filtered out, effectively treating it as a temporary, disposable medium that serves its purpose during synthesis and is then removed without requiring energy-intensive or complex removal processes
2Productivity
If a wet method is used to synthesize solid electrolyte, then mass production is enabled, but additional processes and costs to remove the solvent after reaction are incurred
Solution Approach 1:
By changing from polar to nonpolar solvents with low boiling points, the patent simplifies the solvent removal step from a complex multi-step process to simple evaporation or filtration, reducing process complexity while maintaining productivity
3Ease of manufacture
If a dry method is used to synthesize solid electrolyte by adding precursors and balls and rotating the same, then powder adherence to the inside of the milling jar is caused, but recovery becomes difficult
Solution Approach 1:
The patent introduces a nonpolar solvent as an intermediary substance during the milling process. This solvent acts as a lubricant and anti-adhesive agent, preventing powder from adhering to the milling jar walls while allowing easy recovery of the product after the reaction is complete
4Ease of manufacture
If a dry method is used to synthesize solid electrolyte, then powder adherence to the inside of the milling jar is caused, but recovery becomes difficult
Solution Approach 1:
The nonpolar solvent serves as a mediator that prevents direct contact between the powder and the milling jar surface, reducing material loss due to adherence while maintaining the simplicity of the dry milling approach
5Ease of manufacture
If a dry method is used to synthesize solid electrolyte, then heat is generated during milling, but materials that are unstable at high temperatures cannot be used
Solution Approach 1:
The nonpolar solvent acts as a thermal buffer and heat sink during the milling process, absorbing the heat generated by mechanical friction and preventing temperature from rising to levels that would decompose or destabilize heat-sensitive materials
Solution Approach 2:
By introducing the nonpolar solvent, the patent changes the thermal environment parameters during milling, maintaining lower temperatures that enable the use of thermally unstable materials while preserving the simplicity of the mechanical synthesis approach
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 allows for the rapid synthesis of sulfide-based solid electrolytes with high lithium ion conductivity and excellent reproducibility, overcoming the limitations of conventional wet and dry methods.
Implementation Method 1
the dry method causes powder to adhere to the inside of a milling jar after reaction, making recovery difficult. Moreover, the dry method generates heat during milling... A method involving the use of nonpolar solvents and milling balls to synthesize sulfide-based solid electrolytes, followed by filtration and heat-treatment, which prevents solvent reaction and adherence
Implementation Method 2
the dry method generates heat during milling, making it difficult to use materials that are unstable at high temperatures
Implementation Method 3
e) removing the nonpolar solvent by filtration from the solid electrolyte
Implementation Method 4
followed by filtration and heat-treatment
Data Source
AI summary
Disclosed is a method of manufacturing a sulfide-based solid electrolyte using wet milling. The method includes preparing electrolyte precursor materials; adding the electrolyte precursor materials and milling balls to a container; adding a nonpolar solvent to the container; milling the electrolyte precursor materials with the milling balls to synthesize a solid electrolyte; and removing the nonpolar solvent by filtration from the solid electrolyte.