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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Negating the Interfacial Resistance between Solid and Liquid Electrolytes for Next-Generation Lithium Batteries.
J Padmanabhan Vivek1,2, Nina Meddings1, Nuria Garcia-Araez1,2
1School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
ACS Applied Materials & Interfaces
|December 28, 2021
Summary
Adding a small amount of water to liquid electrolytes dramatically reduces interfacial resistance in solid-liquid battery systems. This breakthrough enhances energy density and efficiency for next-generation lithium-sulfur (Li-S) and lithium-oxygen (Li-O2) batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Hybrid solid-liquid electrolytes offer safety and high energy density in batteries.
- High interfacial resistance between solid and liquid electrolytes limits practical battery performance.
Purpose of the Study:
- To develop a method for suppressing interfacial resistance in solid-liquid battery systems.
- To investigate the effect of water as an additive in liquid electrolytes.
Main Methods:
- Utilized a NASICON-type solid electrolyte with various liquid electrolytes.
- Incorporated water as an electrolyte additive.
- Performed X-ray Photoelectron Spectroscopy (XPS) measurements.
- Estimated potential improvements in battery performance.
Main Results:
- Water addition reduced interfacial resistance from over 100 Ω cm² to below 5 Ω cm².
- XPS revealed similar interphase compositions in wet and dry electrolytes.
- Water's effect is attributed to plasticization, preferential ion solvation, or interphase morphology changes.
Conclusions:
- Water is a highly effective additive for reducing solid-liquid interfacial resistance.
- This approach can significantly improve the energy density (15-22%) and roundtrip efficiency (21-28 percentage points) of Li-S and Li-O2 batteries.
Keywords:
electrolyte additiveslithium metal batterieslithium−ion transportsolid−liquid electrolyte interphasessolid−liquid hybrid electrolytesMore Related Videos
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