Sulfolane Solid Electrolyte With SiO2 for Higher Ion Mobility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing molecular crystal solid electrolytes have high crystallinity, leading to low ion mobility and inadequate ionic conductivity.
Innovation Solution
A solid electrolyte comprising a sulfolane-based compound, 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium (LiCFSA) as a lithium salt, and SiO2 as an inorganic filler, with a normalized surface area of 15 to 900 m2/gSE, is developed to enhance ion mobility and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high crystallinity is used in molecular crystal solid electrolyte, then structural stability is improved, but ion mobility deteriorates leading to low ionic conductivity
Solution Approach 1:
The patent introduces a porous inorganic filler (SiO2) into the molecular crystal solid electrolyte. The porous structure provides additional pathways for ion transport while maintaining the overall structural stability of the crystal, thereby resolving the contradiction between structural stability and ion mobility.
Solution Approach 2:
The patent creates a composite solid electrolyte by combining molecular crystal with inorganic filler (SiO2). This composite structure allows the molecular crystal to provide structural stability while the inorganic filler introduces pathways that enhance ion mobility and ionic conductivity.
2Reliability
If inorganic filler with high specific surface area is added, then ion mobility is improved, but manufacturing complexity increases due to precise control of normalized surface area
Solution Approach 1:
The patent specifies a precise range for the normalized surface area (15 to 900 m2/gSE) of the inorganic filler. By controlling this parameter within a defined range rather than requiring exact values, the patent achieves improved ionic conductivity while maintaining reasonable manufacturing feasibility.
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 proposed solid electrolyte significantly improves ionic conductivity by shifting the solid-solid phase transition temperature to a lower temperature, thereby increasing ion mobility.
Implementation Method 1
assuming that a mass of the inorganic filler per g of the solid electrolyte is W (g/gSE) and that a specific surface area of the inorganic filler is A (m2/g), a normalized surface area WA (m2/gSE) of the inorganic filler is 15 to 900 m2/gSE
Implementation Method 2
The proposed solid electrolyte significantly improves ionic conductivity by shifting the solid-solid phase transition temperature to a lower temperature, thereby increasing ion mobility
Data Source
AI summary
A solid electrolyte containing a molecular crystal, and an inorganic filler, wherein: the molecular crystal contains a sulfolane-based compound, and 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium (LiCFSA) as a lithium salt; the inorganic filler is SiO2; and assuming that a mass of the inorganic filler per g of the solid electrolyte is W (g/gSE) and that a specific surface area of the inorganic filler is A (m2/g), a normalized surface area WA (m2/gSE) of the inorganic filler is 15 to 900 m2/gSE.