Sulfidic Solid Electrolyte Synthesis via Gas-Solid Reactant Mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing solid electrolytes, such as solid and solvent-based methods, result in inhomogeneous distribution of reactants, leading to impurities and secondary phases that impair the electronic properties of the electrolyte.
Innovation Solution
A solid/gas phase method involving the reaction of a solid electrolyte precursor Li (2a + b) S a X b with a partially gaseous Y-containing component to produce a solid electrolyte Li (2c + d - n) Y n+< S c X d, ensuring homogeneous distribution and high purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solid phase synthesis methods are used, then the production process is simple, but the distribution of reactants is inhomogeneous leading to impurities and secondary phases
Solution Approach 1:
The invention changes the physical state parameter of one reactant from solid to gas phase. By using gaseous H2S instead of solid sulfur, the reactants achieve homogeneous distribution through gas-phase diffusion and adsorption onto the solid LiCl precursor, eliminating the inhomogeneity problem while keeping the process simple
Solution Approach 2:
The invention employs gas phase (pneumatics) by introducing H2S gas into the reaction system. The gaseous reactant distributes uniformly throughout the solid precursor matrix, ensuring homogeneous reaction and preventing the formation of secondary phases that occur with solid-solid mixing
2Manufacturing precision
If solvent based methods are used, then the distribution of reactants is homogeneous, but costly and time consuming separation and drying steps are required
Solution Approach 1:
The invention extracts and eliminates the solvent component from the reaction system. By conducting the reaction in the gas phase without organic solvents, the method achieves homogeneous reactant distribution while completely avoiding the need for separation, drying, and washing steps required in solvent-based methods
Solution Approach 2:
The invention replaces the liquid solvent medium with a gas phase system. This substitution eliminates the mechanical separation and drying operations that would otherwise be required to remove solvent molecules, significantly reducing production time and cost while maintaining homogeneous product distribution
3Manufacturing precision
If solvent based methods are used, then the distribution of reactants is homogeneous, but remaining solvent molecules reduce ionic conductivity
Solution Approach 1:
The invention changes the phase parameter of the sulfur source from liquid/solid to gas. This parameter change enables homogeneous distribution of sulfur throughout the electrolyte structure while preventing solvent molecules from being incorporated into the crystal lattice, thereby preserving high ionic conductivity
Solution Approach 2:
The invention converts the potential harm of solvent incorporation into a benefit by using gas phase H2S. The gaseous reactant can be completely removed after reaction, and its use actually benefits the process by providing homogeneous distribution without leaving harmful solvent residues that would reduce ionic conductivity
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 produces solid electrolytes with improved homogeneity and purity, resulting in enhanced ionic conductivity and electrochemical stability, free from unreacted starting material and secondary phases.
Implementation Method 1
A solid/gas phase method involving the reaction of a solid electrolyte precursor Li (2a + b) S a X b with a partially gaseous Y-containing component to produce a solid electrolyte
Implementation Method 2
ensuring homogeneous distribution and high purity
Data Source
Figure 1
AI summary
The present invention relates to a solid electrolyte, its precursor, methods for producing the same as well as its use, e.g. in electrochemical cells or capacitors, fuel cells, batteries, and sensors.