Related Experiment Video
Updated: Nov 1, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Density Prediction of Ionic Liquids at Different Temperatures Using the Average Free Volume Model
1School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China.
This study presents a new model to accurately predict ionic liquid (IL) density using only chemical component information. The model effectively calculates densities for pure and mixed ionic liquids across a broad temperature range.
Area of Science:
- Physical Chemistry
- Materials Science
Background:
- Ionic liquids (ILs) are versatile solvents with tunable properties.
- Accurate density prediction is crucial for IL applications.
- Existing models may require extensive experimental data.
Purpose of the Study:
- To derive a correlation between molar volume and van der Waals volume for ILs.
- To develop a predictive model for IL density based on chemical composition.
- To validate the model's accuracy across various ILs and temperatures.
Main Methods:
- Utilized the average free volume model.
- Derived a correlation for molar volume and van der Waals volume.
- Applied the model to predict densities of pure and mixed ILs.
Main Results:
- The model accurately predicts the density of pure ILs and binary/ternary IL mixtures.
- Achieved average absolute relative deviations (ARDs) of 1.04% for pure ILs and 1.19% for mixtures.
- Overall discrepancies were less than 4% over a temperature range of 278–473.15 K.
Conclusions:
- The derived model provides a reliable method for predicting IL densities.
- The model requires only chemical component information, simplifying calculations.
- Demonstrated high accuracy for a wide range of ILs, including those with imidazolium, pyridinium, pyrrolidinium, phosphonium, and ammonium cations.
More Related Videos
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
06:37Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
Published on: September 17, 2021
Related Concept Videos
pV-Diagrams
Clausius-Clapeyron Equation
Distribution of Molecular Speeds
Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation
Vapor Pressure of Fluid
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
Distillation: Vapor–Liquid Equilibria