Solid Electrolyte Composition for Stable Dispersion and Ion Conductivity
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Solution Overview
Problem
Existing solid electrolyte compositions face challenges with dispersion stability and decreased lithium ion conductivity when mixed with organic solvents, leading to issues like coagulation and sedimentation, which affect the performance of all-solid-state batteries.
Innovation Solution
A solid electrolyte composition incorporating a solid electrolyte material with ion-binding properties and an organic solvent containing a halogen-group-containing compound and at least one ether-group-containing compound or hydrocarbon, which enhances dispersion stability and maintains lithium ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional solid electrolyte compositions are mixed with organic solvents, then processing and formation of solid electrolyte membranes is enabled, but dispersion stability decreases and coagulation or sedimentation occurs
Solution Approach 1:
The patent introduces a specific organic solvent system comprising a halogen-containing compound and an ether or hydrocarbon as an intermediary medium. This solvent system mediates between the solid electrolyte material particles and the processing environment, enabling stable dispersion during manufacturing while preventing coagulation and sedimentation that would otherwise occur with conventional organic solvents.
2Ease of manufacture
If conventional solid electrolyte compositions use organic solvents, then membrane formation is possible, but lithium ion conductivity decreases
Solution Approach 1:
The patent changes the chemical parameters of the organic solvent system by selecting specific halogen-containing compounds combined with ethers or hydrocarbons. This parameter change optimizes the solvent's interaction with the solid electrolyte material, maintaining lithium ion conductivity pathways while enabling membrane formation. The specific solvent composition allows the membrane to form with preserved ionic conduction properties.
3Productivity
If solid electrolyte material is dispersed in organic solvent, then processing becomes feasible, but pinholes and irregularities increase in the formed membrane
Solution Approach 1:
The specialized organic solvent system acts as a mediator that ensures uniform distribution of solid electrolyte material particles during processing. The halogen-containing compound combined with ether or hydrocarbon creates optimal surface interactions, preventing particle aggregation and ensuring homogeneous membrane formation without pinholes or irregularities.
Solution Approach 2:
The patent achieves homogeneity in the solid electrolyte membrane by using a carefully selected organic solvent system. The halogen-containing compound and ether/hydrocarbon combination ensures uniform wetting and distribution of particles throughout the membrane matrix, resulting in homogeneous structure without defects such as pinholes or irregularities.
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 composition achieves excellent dispersion stability and lithium ion conductivity, enabling the production of a dense solid electrolyte member with reduced pinholes and improved charge and discharge efficiency in all-solid-state batteries.
Implementation Method 1
an organic solvent, wherein the organic solvent includes: a halogen-group-containing compound; and at least one selected from the group consisting of an ether-group-containing compound and a hydrocarbon
Data Source
AI summary
A solid electrolyte composition of the present disclosure includes: a solid electrolyte material having ion-binding properties; and an organic solvent. The organic solvent includes: a halogen-group-containing compound; and at least one selected from the group consisting of an ether-group-containing compound and a hydrocarbon.