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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
Published on: May 22, 2018
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Kinetics of lithium electrodeposition and stripping
Shashank Sripad1, Daniel Korff2, Steven C DeCaluwe2
1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USADepartment of Mechanical Engineering, Colorado School of Mines, Golden, Colorado 80401, USA.
The Journal of Chemical Physics
|November 21, 2020
Summary
The Marcus-Hush-Chidsey (MHC) model accurately predicts lithium metal battery performance. Accounting for MHC kinetics is vital for fast charging in electric vehicles and eVTOL aircraft.
Area of Science:
- Electrochemistry
- Materials Science
- Battery Technology
Background:
- Lithium metal electrodes are crucial for rechargeable batteries, impacting performance in electric vehicles (EVs) and electric vertical takeoff and landing (eVTOL) aircraft.
- Electrode kinetics of lithium deposition and stripping are key to achieving fast charge and discharge rates.
Purpose of the Study:
- To implement and validate the Marcus-Hush-Chidsey (MHC) kinetic model for lithium metal electrodes.
- To compare MHC kinetics with Butler-Volmer and Marcus-Hush models in a pseudo-2D battery simulation.
Main Methods:
- Utilized Marcus-Hush-Chidsey (MHC) kinetics to analyze Tafel curve data.
- Implemented the MHC model in Cantera and integrated it into a pseudo-2D battery model.
- Compared simulation results using MHC, Butler-Volmer, and Marcus-Hush kinetic models.
Main Results:
- The MHC model accurately predicts experimental Tafel curve data for lithium metal electrodes.
- Significant deviations in limiting currents were observed between MHC, Butler-Volmer, and Marcus-Hush models under fast charge/discharge conditions.
- Differences in predicted reorganization energies were noted between Marcus-Hush and MHC models across four solvents.
Conclusions:
- The Marcus-Hush-Chidsey (MHC) kinetic model provides a more accurate representation of lithium metal electrode behavior.
- Accurate kinetic modeling is essential for optimizing battery performance for high-power applications like EVs and eVTOLs.
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