Fluoride Ion Battery Electrolyte Conductivity via Anion Acceptor
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Solution Overview
Problem
Fluoride complex anions in ionic liquids lack fluoride anion conductivity, which is essential for fluoride ion batteries, as they have high stability but poor ion conductivity due to strong ionic bonding, making it difficult for fluoride ions to dissociate.
Innovation Solution
Incorporating an anion acceptor with a high acceptor number, such as tripentafluorophenylborane, into an ionic liquid containing fluoride complex anions to weaken the B—F or P—F bonds, thereby enhancing fluoride anion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoride complex anions are used in ionic liquid, then chemical stability and thermal stability are improved, but fluoride anion conductivity deteriorates
Solution Approach 1:
The patent introduces an anion acceptor as an intermediary substance that mediates between the fluoride complex anion and the electrode. The anion acceptor accepts fluoride ions from the fluoride complex anion, enabling fluoride ion transport while maintaining the stability of the original ionic liquid system. This resolves the contradiction by adding a mediating component rather than modifying the stable fluoride complex anion itself.
Solution Approach 2:
The patent changes the chemical environment parameters by introducing an anion acceptor with specific properties (high electron affinity, appropriate size). This parameter change enables the system to achieve both stability (from the fluoride complex anion) and conductivity (through the anion acceptor's ability to facilitate fluoride ion transfer).
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 use of an anion acceptor in the ionic liquid electrolyte for fluoride ion batteries improves ion conductivity, enabling effective fluoridation and defluoridation of active materials, addressing the conductivity limitations of fluoride complex anions.
Implementation Method 1
an anion acceptor with an acceptor number of 75 or more... acts on an ionic liquid containing fluoride complex anions to develop fluoride anion conductivity... weaken the B—F or P—F bonds, thereby enhancing fluoride anion conductivity
Data Source
AI summary
A problem of the present invention is to provide a liquid electrolyte for a fluoride ion battery, in which fluoride anion conductivity is imparted to an ionic liquid containing fluoride complex anions. The present invention solves the problem by providing a liquid electrolyte for a fluoride ion battery, which comprises an ionic liquid containing specific fluoride complex anions and an anion acceptor having a specific acceptor number.