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Updated: May 24, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Understanding the ion jelly conductivity mechanism.

T Carvalho¹, V Augusto, A R Brás

¹REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.

The Journal of Physical Chemistry. B

|February 29, 2012

Summary

Ion jelly, a blend of gelatin and ionic liquid, shows promise as a stable, conductive electrolyte. Its ion dynamics and transport properties were analyzed, revealing potential for advanced electrochemical devices.

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Thermal Scanning Conductometry (TSC) as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

Thermal Scanning Conductometry (TSC) as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

Published on: January 23, 2018

Area of Science:

Materials Science
Electrochemistry
Physical Chemistry

Background:

Ionic liquids (ILs) are promising electrolytes but can be unstable.
Ion jelly, combining gelatin and ILs, offers potential for safer, more conductive electrolytes.
Understanding the conductive mechanism of ion jelly is crucial for its application.

Purpose of the Study:

To elucidate the conductive mechanism of ion jelly using dielectric relaxation spectroscopy (DRS).
To characterize ion jelly properties using differential scanning calorimetry (DSC) and pulsed field gradient nuclear magnetic resonance (PFG NMR) spectroscopy.
To extract and analyze transport properties like ion mobility and diffusion coefficients.

Main Methods:

Dielectric relaxation spectroscopy (DRS) across a wide frequency range (10⁻¹–10⁶ Hz).
Differential scanning calorimetry (DSC) for thermal analysis and glass transition detection.
Pulsed field gradient nuclear magnetic resonance (PFG NMR) for direct measurement of ion diffusion.

Main Results:

All materials exhibited glass transition behavior; ion jelly showed enhanced thermal stability against crystallization compared to the ionic liquid.
DRS revealed conductivity is dominated by ion dynamics, with subdiffusive behavior at high frequencies.
Transport properties, including cation diffusion coefficients, were extracted from DRS and showed excellent agreement with PFG NMR, obeying the Vogel-Fulcher-Tammann (VFT) equation.

Conclusions:

Ion jelly demonstrates comparable ion transport to ionic liquids but with superior stability and crystallization resistance.
The presence of gelatin and water in ion jelly facilitates ion dissociation and translational motion.
Ion jelly is a highly promising material for developing novel, stable electrolytes for electrochemical devices.