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10:53
Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
Published on: February 5, 2019
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Promising Cell Configuration for Next-Generation Energy Storage: Li2S/Graphite Battery Enabled by a Solvate Ionic
Zhe Li1, Shiguo Zhang1, Shoshi Terada1
1Department of Chemistry and Biotechnology, Yokohama National University , 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
ACS Applied Materials & Interfaces
|June 11, 2016
Summary
Researchers developed high-performance lithium-ion sulfur batteries using graphite anodes and lithium sulfide cathodes. Solvate ionic liquid electrolytes enable stable cycling and high efficiency, overcoming previous limitations for graphite-based lithium-sulfur cells.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-ion sulfur batteries offer high theoretical capacity but face challenges with lithium anodes.
- Graphite anodes are desirable for lithium-free designs, but traditional electrolytes hinder their performance in Li-S systems.
- Existing ether electrolytes used in Li-S batteries degrade graphite structure, limiting research on graphite-based cells.
Purpose of the Study:
- To develop high-performance lithium-ion sulfur batteries utilizing graphite anodes and lithium sulfide cathodes.
- To overcome the electrolyte incompatibility issue hindering graphite anode performance in Li-S batteries.
- To explore novel electrolytes that are compatible with both Li2S cathodes and graphite anodes.
Main Methods:
- Fabrication of graphite-based Li-S full cells with highly loaded Li2S/graphene composite cathodes (2.2 mg/cm(2) Li2S loading).
- Utilizing solvate ionic liquid electrolytes as a single-phase medium compatible with both electrode materials.
- Investigating the electrochemical performance and stability of the developed cells.
Main Results:
- The developed Li-S cells demonstrated stable and reversible charge-discharge behavior.
- Solvate ionic liquid electrolytes proved compatible with both Li2S cathodes and graphite anodes.
- The use of these electrolytes suppressed the polysulfide shuttle effect, enhancing battery performance.
- High Coulombic efficiency was achieved in the graphite-based Li-S full cells.
Conclusions:
- Solvate ionic liquid electrolytes are effective in enabling high-performance graphite-based lithium-ion sulfur batteries.
- This approach offers a promising pathway for developing advanced lithium-sulfur batteries without the need for a lithium metal anode.
- The compatibility and shuttle effect suppression provided by these electrolytes are key to achieving stable and efficient Li-S cell operation.
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