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Updated: Jul 10, 2026
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Long term porosity of solid electrolyte interphase on model silicon anodes with liquid battery electrolytes
Jonas Grill1, Jelena Popovic-Neuber2
1Department of Energy and Petroleum Engineering, University of Stavanger, Stavanger, Norway.
Communications Chemistry
|December 20, 2024
Summary
A stable solid electrolyte interphase (SEI) is crucial for battery performance. This study reveals early SEI formation on silicon anodes in various electrolytes and analyzes its properties, offering insights for improved battery longevity.
Area of Science:
- Electrochemistry
- Materials Science
- Battery Technology
Background:
- A stable solid electrolyte interphase (SEI) is critical for battery electrode cycling and shelf life.
- SEI formation on silicon anodes is typically studied post-cycling, not under open-circuit conditions.
Purpose of the Study:
- To investigate the formation and behavior of liquid/solid SEI on silicon anodes under near open-circuit conditions.
- To analyze the impact of electrolyte composition on SEI properties and long-term stability.
Main Methods:
- Symmetric cells with silicon electrodes were used.
- Temperature-dependent electrochemical impedance spectroscopy (EIS) was employed to measure SEI activation energies.
- Various electrolyte formulations (carbonate, glyme-based, additives, water content) were systematically studied.
Main Results:
- Liquid/solid SEI forms on silicon anodes even before initial cycling.
- Glyme-based electrolytes yield more porous SEIs compared to carbonate-based ones.
- Vinylene carbonate addition improves SEI stability and reduces resistance in glyme electrolytes; small water amounts create denser SEIs.
Conclusions:
- Early SEI formation under open-circuit conditions significantly impacts battery performance.
- Electrolyte engineering, particularly using additives like vinylene carbonate, can optimize SEI properties for enhanced silicon anode stability and battery life.
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