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Updated: Aug 5, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Understanding solid electrolyte interphase formation in hydroborate-based all-solid-state batteries
Hugo Braun1,2, Arndt Remhof1,2, Corsin Battaglia1,3,4
1Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland. corsin.battaglia@empa.ch.
Faraday Discussions
|July 31, 2026
Summary
Hydroborate solid electrolytes show promise for solid-state batteries, offering slower interface resistance buildup than argyrodite electrolytes, crucial for long-term stability and performance.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Hydroborate solid electrolytes are emerging as alternatives to traditional argyrodite electrolytes.
- Key challenges include balancing ionic conductivity, electrochemical stability, and interface compatibility.
Purpose of the Study:
- To compare the interface resistance growth rate of hydroborate and argyrodite electrolytes.
- To evaluate their performance with different battery components like lithium metal, silicon, and NMC811.
Main Methods:
- Utilized electrochemical impedance spectroscopy (EIS) to monitor interface resistance over time.
- Employed a diffusion-limited interphase growth model for quantitative analysis.
Main Results:
- Hydroborate electrolytes exhibited slower interface resistance buildup with lithium metal compared to argyrodites.
- Both electrolytes showed slower resistance growth with lithiated silicon, favoring hydroborates.
- Hydroborates showed resistance growth upon oxidation at 4.1 V, while argyrodites did not, indicating cathode interface limitations.
Conclusions:
- Hydroborate and hydrocarborate electrolytes are promising for high-energy solid-state batteries.
- Interfacial transport properties are critical for long-term stability, more so than bulk stability alone.
- Tailoring interphase composition and transport is essential for optimizing battery performance.
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