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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Solvent Effect in Imidazole-Based Poly(Ionic liquid) Membranes: Energy Storage and Sensing.
Arko Kesküla1, Anna-Liisa Peikolainen1, Paul A Kilmartin2
1Intelligent Materials and Systems Lab, Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
Polymers
|October 23, 2021
Summary
Polymerized ionic liquids (PILs) show enhanced performance in aqueous electrolytes for energy storage and sensors. These solid polymer electrolytes exhibit higher ion conductivity and specific capacitance in water compared to other solvents.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Technologies
Background:
- Polymerized ionic liquids (PILs) are advanced materials for sustainable energy storage and gas sensors.
- PILs offer high ion conductivity, making them suitable as solid polymer electrolytes in batteries.
Purpose of the Study:
- To investigate the impact of polar protic (aqueous) and polar aprotic (propylene carbonate) electrolytes on hydrophobic PIL films.
- To evaluate the electroactivity, ion conductivity, and energy storage capabilities of PILs in different electrolyte environments.
Main Methods:
- Cyclic voltammetry, scanning ionic conductance microscopy, and square wave voltammetry were employed.
- Electrochemical impedance spectroscopy and chronopotentiometric measurements were used to assess ion conductivity and energy storage.
- Material characterization included SEM, EDX, FTIR, and solid-state NMR spectroscopy.
Main Results:
- PIL films demonstrated superior electroactivity in aqueous electrolytes.
- Ion conductivity was three times higher in aqueous electrolytes compared to aprotic ones.
- Specific capacitance for energy storage was 1.6 times higher in aqueous electrolytes, with novel solvent sensing properties observed.
Conclusions:
- Aqueous electrolytes significantly enhance the performance of hydrophobic PIL films for energy storage applications.
- PILs exhibit promising potential as solid polymer electrolytes with improved conductivity and capacitance in sustainable energy technologies.
- The study highlights the influence of electrolyte choice on PIL performance and introduces their potential as solvent sensors.
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