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Updated: Oct 12, 2025

Preparation of Binary and Ternary Deep Eutectic Systems

Preparation of Binary and Ternary Deep Eutectic Systems

Published on: October 31, 2019

Deep Eutectic Solvents for High-Temperature Electrochemical Capacitors.

Adam Mackowiak¹, Przemyslaw Galek¹, Krzysztof Fic¹

¹Institute of Chemistry and Electrochemistry Poznan University of Technology Berdychowo 4 61-131 Poznan Poland.

Chemelectrochem

|November 25, 2021

Summary

This summary is machine-generated.

A novel deep eutectic mixture electrolyte using lithium nitrate and acetamide demonstrates stable performance in carbon-based electrochemical capacitors at 100°C, outperforming traditional electrolytes under extreme conditions.

Keywords:

deep eutectic solvent (DES)electric double-layer capacitor (EDLC)electrochemical capacitor (EC)energy storage high temperature

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Area of Science:

Materials Science
Electrochemistry
Chemical Engineering

Background:

Electrochemical capacitors require stable electrolytes for reliable operation, especially under extreme temperatures.
Conventional electrolytes (water-based, organic-based) often fail at elevated temperatures, limiting device applications.
Deep eutectic mixtures offer potential as advanced electrolyte solutions due to their unique properties.

Purpose of the Study:

To investigate a deep eutectic mixture of lithium nitrate (V) and acetamide as a high-temperature electrolyte for carbon-based electrochemical capacitors.
To evaluate the electrochemical performance and stability of this novel electrolyte under demanding operational conditions.
To analyze the chemical and electrochemical characteristics of the lithium nitrate-acetamide system.

Main Methods:

Characterization of the deep eutectic mixture using infrared and Raman spectroscopy, differential scanning calorimetry, and gas chromatography-mass spectrometry.
Electrochemical testing including system ageing, self-discharge monitoring, leakage current measurement, specific capacitance, and maximum voltage determination.
Analysis of ion substitution (Li+ with Na+ or K+) within the electrolyte system.

Main Results:

The lithium nitrate-acetamide deep eutectic mixture exhibits stable electrochemical performance at 100°C.
The electrolyte demonstrates good device performance, showing stability in ageing, self-discharge, and leakage current tests.
Fundamental electrochemical parameters like specific capacitance and maximum voltage were successfully determined.

Conclusions:

The developed deep eutectic mixture serves as a promising high-temperature electrolyte for electrochemical capacitors.
This electrolyte offers a viable alternative to conventional formulations for devices operating under critical temperature conditions.
The study provides a comprehensive understanding of the electrolyte's chemistry and electrochemical behavior.