Plastic Crystal Solid Electrolyte Ion Conductivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Plastic-crystal-based solid electrolytes exhibit low ion conductivity compared to sulfide-based and oxide-based solid electrolytes, limiting their performance in power storage devices.
Innovation Solution
Incorporating a mixture of specific amide anions, such as bis(perfluoroalkylsulfonyl)amide and hexafluorophosphate anions, or perfluoroalkylsulfonic acid anions into the plastic crystal structure to enhance ion conductivity, while maintaining the solid state at usage temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic crystal is used as solid electrolyte, then adhesion to electrode is improved and easier to penetrate porous structure, but ion conductivity is low compared to sulfide-based and oxide-based solid electrolytes
Solution Approach 1:
The patent uses a composite material system consisting of plastic crystal matrix combined with specific anion components (bis(fluorosulfonyl)amide and bis(trifluoromethanesulfonyl)amide). This composite approach allows the material to maintain the adhesion and porous structure penetration benefits of plastic crystals while achieving improved ion conductivity through the specific anion composition, resolving the contradiction between ease of manufacture and reliability.
Solution Approach 2:
The patent changes the chemical composition parameters of the solid electrolyte by selecting specific anion types and their ratios. By adjusting the anion composition (using a mixture of FSA and TFSA anions in specific proportions), the ion conductivity parameter is improved while maintaining the plastic crystal's advantageous properties for electrode adhesion and porous structure penetration.
2Device complexity
If single type of anion is used in plastic crystal, then structure is simple, but ion conductivity is low; mixing two types of specific anions improves ion conductivity
Solution Approach 1:
The patent merges two different anion types (bis(fluorosulfonyl)amide and bis(trifluoromethanesulfonyl)amide) into a single solid electrolyte system. This combining of multiple anion components creates a synergistic effect that improves ion conductivity beyond what either anion could achieve alone, while maintaining a relatively simple overall structure that is still manageable for manufacturing.
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
Significantly improves ion conductivity of the solid electrolyte, enhancing the performance of power storage devices by facilitating better ion hopping and conductivity within the electrolyte.
Implementation Method 1
a solid electrolyte including plastic crystals... facilitates better ion hopping and conductivity within the electrolyte
Data Source
AI summary
A plastic-crystal-based solid electrolyte with high ion conductivity and a power storage device using said solid electrolyte are provided. The plastic crystal includes two different types of anions selected from a group of various amide anions in which two hydrogen atoms of NH2 anion are substituted with perfluoroalkylsulfonyl group, fluorosulfonyl group, or both, and tris(trifluoromethanesulfonyl)metanide anion, or the plastic crystal includes anions selected one each from the first group, and a second group of hexafluorophosphate anion, various perfluoroalkylphosphate anions in which a part of fluorine atoms of PF6 is substituted with fluoroalkyl group, and various perfluoroalkylborate anions in which a part of fluorine atoms of BF4 anion is substituted with fluoroalkyl group.