Long-term behavior of solid electrolyte interphase on silicon anodes
Author Information
Author(s): Jonas Grill, Jelena Popovic-Neuber
Primary Institution: University of Stavanger
Hypothesis
What is the long-term evolution of the solid electrolyte interphase (SEI) on silicon anodes in different electrolyte chemistries?
Conclusion
The study shows that the SEI formed on silicon anodes is influenced by electrolyte chemistry, concentration, and water content, affecting its resistance and stability over time.
Supporting Evidence
- SEIs formed in glyme-based electrolytes are generally more porous than those in carbonate-based electrolytes.
- The addition of vinylene carbonate to glyme electrolyte stabilizes the SEI over time.
- A small amount of water in glyme electrolytes leads to a denser SEI without significantly changing its resistance.
Takeaway
This study looks at how the coating on silicon battery parts changes over time when different liquids are used, which helps batteries last longer.
Methodology
The study used electrochemical impedance spectroscopy (EIS) to analyze the SEI formation and its properties over time under various conditions.
Limitations
The study primarily focuses on model systems and may not fully represent commercial battery conditions.
Digital Object Identifier (DOI)
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