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Ionic Conductive and Highly-Stable Interface for Alkali Metal Anodes
Enzhong Jin1, Karnpiwat Tantratian2, Changtai Zhao1
1Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada.
Small (Weinheim an Der Bergstrasse, Germany)
|July 23, 2022
Summary
This study developed a universal atomic layer deposition (ALD) method to create ionic conductive interfaces for lithium and sodium metal anodes, effectively suppressing dendrite formation and enhancing battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Alkali metal anodes offer high capacity but suffer from dendrite formation and interface instability.
- The solid electrolyte interphase (SEI) critically influences alkali metal deposition and battery performance.
- Developing stable and conductive interfaces is crucial for next-generation batteries.
Purpose of the Study:
- To develop a facile and universal method for fabricating ionic conductive interfaces for lithium and sodium metal anodes.
- To investigate the influence of atomic layer deposition (ALD) parameters on coating properties.
- To demonstrate the effectiveness of these interfaces in improving electrochemical performance.
Main Methods:
- Modified atomic layer deposition (ALD) using alkali metals as precursors.
- Characterization of coating composition and structure.
- Electrochemical testing of modified anodes.
- Electrochemical phase-field modeling.
Main Results:
- Successfully fabricated ionic conductive coatings on Li and Na metal anodes using a universal ALD approach.
- Optimized ALD deposition temperature influenced coating composition and structure, leading to improved electrochemical performance.
- Phase-field modeling confirmed the coatings promote uniform electrodeposition and suppress dendrites.
Conclusions:
- The developed ALD method provides a universal strategy for stabilizing alkali metal anodes.
- Ionic conductive coatings significantly enhance the electrochemical performance and cycle life of Li and Na metal batteries.
- This approach is adaptable for various metal anodes, coatings, and deposition techniques.
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