Fluoride Ion Electrolyte Heating for Ionic Dissociation
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Solution Overview
Problem
Conventional fluoride ion electrolytes exhibit insufficient ionic conductivity, which hinders the performance of fluoride ion batteries due to strong ion binding properties of fluoride salts, making ionic dissociation difficult at room temperature.
Innovation Solution
Heating the fluoride and solvent mixture to a temperature lower than the solvent's decomposition point promotes ionic dissociation and improves fluoride ion conductivity, with preferred heating temperatures above 24°C and mixing times ranging from 10 minutes to 24 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoride salts are dissolved in solvent at room temperature, then the electrolyte solution can be prepared, but ionic conductivity is insufficient due to strong ion binding properties
Solution Approach 1:
The patent applies temperature as a parameter change to resolve the contradiction. By heating the fluoride salt and solvent mixture to elevated temperatures (but below solvent decomposition point), the ionic dissociation is promoted, increasing ion concentration and improving ionic conductivity. After heating, the solution can be cooled to room temperature while maintaining the improved conductivity, thus achieving both ease of manufacture and high reliability.
2Reliability
If heating temperature is increased to improve ionic dissociation, then conductivity improves, but solvent decomposition may occur
Solution Approach 1:
The patent applies partial action by heating to a temperature that is sufficient to promote ionic dissociation and improve conductivity, but deliberately kept below the decomposition point of the solvent. This partial heating approach achieves the desired conductivity improvement without causing harmful solvent decomposition, resolving the contradiction between improving reliability and avoiding harmful effects.
3Stability of the object's composition
If fluoride salts are used with strong ion binding properties, then stable electrolyte composition is achieved, but ionic dissociation is difficult and conductivity is low
Solution Approach 1:
The patent applies preliminary action by performing heating treatment during the electrolyte preparation process. This preliminary thermal treatment promotes ionic dissociation before the electrolyte is assembled into the battery, ensuring that the fluoride salts are adequately dissociated into ions. This preliminary action resolves the contradiction by establishing both stable composition and high conductivity in the final product.
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
This method significantly increases ion concentration and conductivity of fluoride ions in the electrolyte solution, enhancing the performance of fluoride ion batteries by facilitating ionic dissociation without solvent decomposition, as demonstrated in examples where heating improves conductivity even after cooling.
Implementation Method 1
fluoride salts have strong ion binding properties and ionic dissociation is difficult to progress... by heating a fluoride and a solvent when they are mixed... make the ionic dissociation progress and to improve the conductivity of negative ions (fluoride ions)
Data Source
AI summary
A method for manufacturing a fluoride ion conducting electrolyte solution which can improve ionic conductivity includes a step of heating a fluoride and/or a solvent when the fluoride and the solvent are mixed, wherein a heating temperature at the step is lower than a temperature at which the solvent decomposes.