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Bis(2,2'-biphenoxy)borates for electrochemical double-layer capacitor electrolytes
Robert Francke1, Dario Cericola, Rüdiger Kötz
1Institute for Organic Chemistry, Mainz University, Duesbergweg 10-14, 55128 Mainz, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 18, 2011
Summary
Adding fluorine to bis(2,2′-biphenoxy)borates enhances supercapacitor performance. Increased fluorine content directly correlates with higher electrochemical stability, with optimal results seen with two fluorine atoms per benzene ring.
Area of Science:
- Materials Science
- Electrochemistry
- Organic Chemistry
Background:
- Supercapacitors are crucial energy storage devices.
- Electrolyte stability is a key factor limiting supercapacitor performance.
- Organic borate compounds offer potential as electrolyte components.
Purpose of the Study:
- To synthesize novel fluorine-substituted bis(2,2′-biphenoxy)borates.
- To investigate the impact of fluorine substitution on electrochemical stability.
- To determine the optimal fluorine content for enhanced supercapacitor performance.
Main Methods:
- Synthesis of fluorine-decorated bis(2,2′-biphenoxy)borates.
- Fabrication and testing of supercapacitor cells using these compounds.
- Electrochemical stability measurements.
Main Results:
- Successful synthesis of fluorine-substituted bis(2,2′-biphenoxy)borates.
- A direct correlation observed between fluorine content and electrochemical stability.
- Maximum performance achieved with two fluorine substituents per benzene moiety.
Conclusions:
- Fluorine substitution significantly enhances the electrochemical stability of bis(2,2′-biphenoxy)borates.
- These fluorinated compounds show promise for improving supercapacitor performance.
- Controlled fluorination is a viable strategy for designing advanced energy storage materials.
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