Solid Electrolyte Production Using Molten Sulfur Without Carbon Residue
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solid-state electrolyte production methods using organic solvents result in heterogeneous mixtures, unwanted contaminants, and carbon residues due to solvent reaction or insufficient removal, leading to suboptimal electrolyte quality.
Innovation Solution
A method involving the use of molten sulfur as a solvent to form a slurry with reactants, followed by heating to remove elemental sulfur, forming a solid-state electrolyte without carbon residues, using a plasma system to vaporize and condense sulfur, and recycling it for reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If organic solvents are used to mix precursor materials, then homogeneity of the mixture is improved, but carbon residues and unwanted contaminants are introduced
Solution Approach 1:
The patent changes the physical state parameter of the mixing medium from solid/liquid organic solvents to molten sulfur (liquid state above 115°C). This parameter change allows the sulfur to act as a temporary carrier for homogeneous mixing, then be completely removed by vaporization, eliminating carbon residue problems while maintaining mixing homogeneity.
Solution Approach 2:
Molten sulfur serves as an intermediary substance that facilitates homogeneous mixing of precursor materials during the slurry formation stage, then is completely removed by heating. The sulfur acts as a temporary medium that performs the mixing function without leaving harmful residues, unlike organic solvents that carbonize at high temperatures.
2Stability of the object's composition
If organic solvents are used to produce homogeneous mixtures, then electrolyte phase consistency is improved, but solvent removal completeness becomes problematic
Solution Approach 1:
The patent utilizes phase transitions of sulfur (solid→liquid→gas) to solve the solvent removal problem. Sulfur melts above 115°C to form a liquid slurry for mixing, then vaporizes completely at higher temperatures (above its boiling point of 444.6°C), ensuring no residual solvent remains in the final electrolyte product.
3Object-generated harmful factors
If precursor materials are mixed without organic solvent, then carbon residues are eliminated, but homogeneity of the mixture deteriorates
Solution Approach 1:
The patent changes the temperature parameter to above 115°C to melt sulfur, creating a liquid medium that enables homogeneous mixing of precursors. This temperature parameter change allows the system to achieve both homogeneity (through liquid-phase mixing) and absence of carbon residues (by using sulfur instead of organic solvents).
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
Produces a homogeneous solid-state electrolyte with minimal carbon content, ensuring high purity and consistency, thereby improving the quality and efficiency of electrolyte production.
Implementation Method 1
combining at least one reactant with elemental sulfur in a molten state to produce a reactant slurry
Implementation Method 2
heating the reactant slurry to remove the elemental sulfur, thereby forming the powder product
Implementation Method 3
heating the reactant slurry is performed using a plasma source
Implementation Method 4
condensing the removed elemental sulfur
Data Source
AI summary
Systems and methods using a plasma source and molten sulfur produce a homogeneous mixture of reactants and powder product devoid of a carbon residue. The systems and methods are used to form materials for use in a solid-state electrochemical cell without using organic solvents, which may form a chemical residue or may carbonize during high-temperature heat treatment.