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Updated: Mar 24, 2026

Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
Insight into the Li2CO3-K2CO3 eutectic mixture from classical molecular dynamics: Thermodynamics, structure, and
Dario Corradini1, François-Xavier Coudert2, Rodolphe Vuilleumier1
1Department of Chemistry, École Normale Supérieure-PSL Research University, 24 Rue Lhomond, 75005 Paris, France.
We developed a new force field for Li2CO3-K2CO3 molten salt, enabling efficient simulations. This study reveals the mixture
Area of Science:
- Computational materials science
- Physical chemistry
- Thermodynamics and statistical mechanics
Background:
- Molten salt mixtures are crucial for various industrial applications, including energy storage and high-temperature processes.
- Understanding the thermodynamic, structural, and dynamic properties of these mixtures is essential for optimizing their performance.
- Accurate molecular simulations require reliable force fields that capture interatomic interactions effectively.
Purpose of the Study:
- To develop and validate a new classical non-polarizable force field for the Li2CO3-K2CO3 (62:38 mol.%) eutectic mixture.
- To investigate the thermodynamic, structural, and dynamic properties of this molten salt under varying temperature (900-1100 K) and pressure (0-5 GPa) conditions.
- To provide molecular-level insights into the behavior of the eutectic mixture, focusing on transport properties.
Main Methods:
- Development of a new classical non-polarizable force field for the Li2CO3-K2CO3 eutectic mixture.
- Optimization of the force field using experimental data and first-principles molecular dynamics (FPMD) simulations.
- Molecular dynamics (MD) simulations to study the equation of state, structure, and dynamics (self-diffusion, viscosity, ionic conductivity) across a range of temperatures and pressures.
Main Results:
- A novel, efficient classical non-polarizable force field for the Li2CO3-K2CO3 eutectic mixture was successfully developed and validated.
- The equation of state for the mixture was characterized under thermodynamic conditions from 900 to 1100 K and 0 to 5 GPa.
- Temperature and pressure dependencies of self-diffusion coefficients, viscosity, and ionic conductivity were analyzed, providing detailed molecular insights.
Conclusions:
- The developed force field enables efficient and accurate long-timescale molecular simulations of the Li2CO3-K2CO3 eutectic mixture.
- The study provides a comprehensive understanding of the thermodynamic, structural, and dynamic properties of this molten salt under relevant conditions.
- These findings are crucial for the design and application of molten salts in high-temperature technologies.
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