Aromatic Solvent Electrolyte for Fluoride Ion Battery Capacity
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Solution Overview
Problem
Fluoride ion batteries face low stability and reactivity issues due to fluoride ions reacting with the liquid electrolyte before interacting with active materials, limiting battery capacity.
Innovation Solution
A liquid electrolyte for fluoride ion batteries is developed using an aromatic solvent with an aromatic cation and anion, where the molar ratio of the aromatic cation to fluoride ions is greater than 1, enhancing the stability and reactivity of fluoride ions with active materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional solvents (non-aromatic ionic liquids) are used, then the liquid electrolyte can be formed, but the fluoride ion reacts with the electrolyte before reacting with active material, resulting in low fluoridation activity and limited battery capacity
Solution Approach 1:
The patent changes the chemical structure parameter of the solvent from conventional non-aromatic ionic liquids to aromatic ionic liquids. This structural parameter change fundamentally alters the interaction between fluoride ions and the solvent, reducing unwanted side reactions while maintaining electrolyte formation, thereby simultaneously improving fluoride ion stability and fluoridation activity.
Solution Approach 2:
The aromatic ionic liquid acts as an intermediary medium that facilitates the reaction between fluoride ions and active materials. The aromatic structure provides a unique chemical environment that stabilizes fluoride ions while enabling their controlled release and effective reaction with active materials, resolving the contradiction between stability and reactivity.
2Productivity
If fluoride ion reactivity is increased to improve fluoridation activity, then battery capacity can be enhanced, but fluoride ion reacts prematurely with liquid electrolyte, reducing overall efficiency
Solution Approach 1:
The patent modifies the chemical environment parameter by introducing aromatic rings into the ionic liquid structure. This changes the electrochemical window and interaction characteristics of the electrolyte, allowing fluoride ions to maintain high reactivity with active materials while reducing premature reactions, thus enabling high battery capacity with controlled reactivity.
3Ease of manufacture
If non-aromatic ionic liquid is used as solvent, then electrolyte can be formed, but coulombic efficiency is low due to premature fluoride ion consumption
Solution Approach 1:
The patent changes the molecular structure parameter of the solvent to aromatic ionic liquid, which fundamentally improves coulombic efficiency. The aromatic structure provides better stability for fluoride ions, reducing their premature consumption during electrolyte formation, thereby achieving high coulombic efficiency while maintaining ease of electrolyte formation.
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 configuration improves the fluoridation activity and coulombic efficiency, allowing for a larger battery capacity and reducing the production of hydrofluoric acid.
Implementation Method 1
a molar ratio of the aromatic cation to a fluoride ion is more than 1
Implementation Method 2
improvement of activity for fluoridating an active material
Data Source
AI summary
The problem to be solved is to provide a liquid electrolyte for a fluoride ion battery which allows a larger capacity of the battery. Solving the problem by providing a liquid electrolyte for a fluoride ion battery including a fluoride salt and a solvent to dissolve the fluoride salt, characterized in that the solvent is an aromatic material having an aromatic cation and an anion, and a molar ratio of the aromatic cation to a fluoride ion is more than 1.