Sulfide Solid Electrolyte Composite Powder for Homogeneous Mixing
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Solution Overview
Problem
The production of sulfide solid electrolytes is hindered by component separation and deviation due to the addition of metal compounds like tin sulfide, which have a larger specific gravity, leading to difficulties in homogenization, particularly on a large scale, and the generation of hydrogen sulfide when exposed to moisture.
Innovation Solution
A method involving the addition of a metal compound to a solution containing sulfide solid electrolyte raw materials, forming a dispersion liquid, removing the solvent to create a composite powder, and using this powder to produce a sulfide solid electrolyte composite through either a solid phase or melting method, ensuring high homogeneity and preventing hydrogen sulfide generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal compound such as tin sulfide is added to a raw material of the sulfide solid electrolyte to reduce hydrogen sulfide generation, then the safety and stability are improved, but the components become easily separated due to larger specific gravity difference, making homogenization difficult
Solution Approach 1:
The patent changes the physical state parameter of the metal compound from solid powder to liquid form by using an organic metal compound. This parameter change eliminates the specific gravity difference between components, preventing separation during mixing and transport while maintaining the safety function of hydrogen sulfide suppression.
Solution Approach 2:
The patent introduces an organic compound as an intermediary carrier to dissolve the metal compound. This intermediary allows the metal compound to be uniformly distributed throughout the sulfide solid electrolyte raw materials in liquid form, preventing direct contact and separation issues that would occur with solid powder mixing.
2Object-affected harmful factors
If a metal compound is added to the raw material to prevent hydrogen sulfide generation, then the harmful factor is reduced, but component deviation occurs during preparation, transport, and stirring
Solution Approach 1:
The patent changes the physical state of the metal compound from solid to liquid by using an organic metal compound. This parameter change ensures uniform distribution and prevents component deviation during preparation, transport, and stirring processes, maintaining stable composition throughout the production cycle.
Solution Approach 2:
The patent uses the liquid state (hydraulic principle) of the organic metal compound to achieve uniform distribution through flow and mixing. The liquid carrier allows the metal compound to be evenly dispersed throughout the raw materials, preventing segregation and composition deviation during handling and processing.
3Object-affected harmful factors
If solid metal sulfide is used to suppress hydrogen sulfide, then safety is improved, but the components separate due to density difference, particularly on large scale production
Solution Approach 1:
The patent changes the metal compound from solid metal sulfide to liquid organic metal compound. This parameter change eliminates density-based separation issues that plague large-scale solid powder mixing, enabling efficient and uniform production at scale while maintaining hydrogen sulfide suppression capabilities.
Solution Approach 2:
The patent introduces an organic compound as a liquid intermediary carrier that dissolves the metal compound. This intermediary enables easy mixing and uniform distribution during large-scale production without the separation problems inherent in solid-solid mixing, significantly improving production efficiency.
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 prevents hydrogen sulfide formation and achieves a sulfide solid electrolyte composite with minimal component deviation, enhancing battery performance by maintaining metal sulfide homogeneity within the electrolyte.
Implementation Method 1
adding a metal compound to a solution containing at least one sulfide solid electrolyte raw material and dispersing the metal compound or a compound derived from the metal compound to obtain a metal dispersion liquid
Implementation Method 2
removing a solvent of the metal dispersion liquid to obtain a composite powder of the metal compound or the compound derived from the metal compound and the sulfide solid electrolyte raw material
Data Source
AI summary
A method for producing a sulfide solid electrolyte composite includes: adding a metal compound to a solution containing at least one sulfide solid electrolyte raw material and dispersing the metal compound or a compound derived from the metal compound to obtain a metal dispersion liquid; removing a solvent of the metal dispersion liquid to obtain a composite powder of the metal compound or the compound derived from the metal compound and the sulfide solid electrolyte raw material; and obtaining the sulfide solid electrolyte composite using the composite powder.