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Updated: Sep 23, 2025
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Ionic conductivity of melt-frozen LiBH4 films
J Trück1, E Hadjixenophontos1,2, Yug Joshi1
1University of Stuttgart, Department of Materials Science, Chair of Materials Physics Heisenbergstrasse 3 70569 Stuttgart Germany Guido.Schmitz@mp.imw.uni-stuttgart.de.
RSC Advances
|May 11, 2022
Summary
Lithium borohydride (LiBH4) films were fabricated into dense micrometer films for all-solid-state batteries. These films exhibit a reversible phase transformation and achieve a high conductivity of 10^3 S cm^-1.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Physics
Background:
- Lithium borohydride (LiBH4) possesses high lithium ion conductivity, making it a promising material for solid-state electrolytes.
- Current fabrication methods for LiBH4 often involve powders, limiting their application in dense battery architectures.
Purpose of the Study:
- To investigate the formation of dense micrometer films of LiBH4.
- To evaluate the electrochemical properties, specifically ionic conductivity, of these LiBH4 films.
- To explore the potential of these films in all-solid-state battery applications.
Main Methods:
- Dense micrometer LiBH4 films were prepared using a melt-spinning and solidification process.
- Characterization involved electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy.
Main Results:
- The formation of dense micrometer LiBH4 films was successfully achieved.
- A reversible phase transformation within the LiBH4 films was confirmed through characterization.
- The LiBH4 films demonstrated a maximum ionic conductivity of 10^3 S cm^-1.
Conclusions:
- Dense micrometer LiBH4 films can be fabricated via melt-spinning, offering an alternative to powder-based methods.
- The observed reversible phase transformation and high conductivity suggest suitability for all-solid-state batteries.
- This fabrication technique enhances the potential of LiBH4 as a solid electrolyte material.
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