Thermodynamic Feedback Mechanisms for Mitigating Polarization in Lithium-Ion Batteries
Haotian Qu1, Mengtian Zhang1, Haocheng Ji1
1Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P.R. China.
Angewandte Chemie (International Ed. in English)
|August 19, 2025
Summary
Understanding lithium-ion battery (LIB) performance requires balancing kinetics and thermodynamics. This study reveals steepening the equilibrium potential profile significantly reduces polarization heterogeneity, enhancing stability for extreme conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium-ion battery (LIB) performance relies on kinetics and thermodynamics, governing polarization.
- Kinetic limitations receive focus, but thermodynamic factors, especially under extreme conditions, are overlooked.
- This oversight hinders comprehensive LIB design principles.
Purpose of the Study:
- To systematically investigate coupled thermodynamic and kinetic effects in LIBs.
- To identify key thermodynamic parameters influencing polarization dynamics.
- To develop a thermodynamic design strategy for improved LIB performance.
Main Methods:
- Advanced multiphysics simulations were employed.
- The study focused on the interplay between thermodynamics and kinetics.
- Analysis centered on the equilibrium potential profile slope.
Main Results:
- The slope of the equilibrium potential profile was identified as a pivotal thermodynamic parameter.
- Steeper slopes induce negative feedback, mitigating polarization heterogeneity.
- An 80% reduction in polarization heterogeneity was achieved through the proposed design strategy.
Conclusions:
- Steepening the equilibrium potential enhances thermodynamic feedback for consistent electrode utilization.
- The findings provide a theoretical framework for polarization dynamics in LIBs.
- Actionable thermodynamic design principles enable LIBs for extreme operating conditions.
Keywords:
Equilibrium potential profileLithium‐ion batteriesMultiphysics simulationPolarization uniformityThermodynamic feedbackMore Related Videos
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