Sulfide Solid Electrolyte Processing for High Ionic Conductivity
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Solution Overview
Problem
Existing liquid phase methods for producing sulfide solid electrolytes face challenges in achieving high ionic conductivity due to decomposition and loss of components during precipitation, and conventional methods for removing complexing agents are inefficient, limiting mass production capabilities.
Innovation Solution
A method involving the production of a sulfide solid electrolyte by mixing raw materials with a complexing agent and heating the electrolyte precursor-containing substance in a heated air stream to efficiently remove the complexing agent, thereby maintaining the dispersed state and enhancing ionic conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a liquid phase method is used to produce sulfide solid electrolyte, then productivity is improved, but manufacturing precision deteriorates due to decomposition and loss of components during precipitation
Solution Approach 1:
The patent changes the physical state parameter of the complexing agent from liquid to solid form, which prevents decomposition during the process. This parameter change allows the liquid phase method to be used for high-productivity production while maintaining high manufacturing precision and ionic conductivity of the sulfide solid electrolyte.
2Manufacturing precision
If conventional drying methods are used to remove complexing agent, then productivity is reduced, but manufacturing precision is maintained
Solution Approach 1:
The patent extracts the complexing agent from the electrolyte precursor through heating in a heated air stream. This extraction method efficiently removes the complexing agent and impurities while maintaining high productivity, enabling mass production of sulfide solid electrolytes with high purity and ionic conductivity.
3Ease of manufacture
If complexing agent is not completely removed, then ease of manufacture is improved, but reliability deteriorates due to impurity generation and regeneration of complexes
Solution Approach 1:
The patent applies continuous heating in a heated air stream to completely remove the complexing agent. This continuous action prevents the regeneration of complexes and eliminates impurity generation, ensuring high reliability and stable ionic conductivity of the final sulfide solid electrolyte product.
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
This approach allows for the efficient production of sulfide solid electrolytes with high ionic conductivity and facilitates mass production by effectively removing the complexing agent, reducing impurities, and suppressing regeneration of complexes and impurity generation.
Implementation Method 1
heating the electrolyte precursor-containing substance in a heated air stream
Implementation Method 2
heating the electrolyte precursor-containing substance in a heated air stream
Data Source
AI summary
Provided is a method for producing a sulfide solid electrolyte, which can efficiently produce a sulfide solid electrolyte having a high ionic conductivity while using a liquid phase method and can be easily mass-produced, and which includes the steps of: obtaining an electrolyte precursor-containing substance containing a powder of the electrolyte precursor by mixing a raw material-containing substance containing a lithium atom, a phosphorus atom, a sulfur atom, and a halogen atom with a complexing agent; and then heating the electrolyte precursor-containing substance in a heated air stream.