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Lithiophilic-lithiophobic gradient interfacial layer for a highly stable lithium metal anode
Huimin Zhang1,2, Xiaobin Liao3,4, Yuepeng Guan5
1Research Institute of Chemical Defense, 100191, Beijing, China.
Nature Communications
|September 15, 2018
Summary
A novel gradient interfacial layer effectively suppresses lithium dendrite growth in lithium-metal anodes. This strategy enhances battery cycle life and stability for high-energy density applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium dendrite growth is a major obstacle for high-energy density lithium-metal batteries.
- Existing protection strategies often fail to provide long-term stability.
Purpose of the Study:
- To develop a gradient interfacial layer for lithium-metal anodes.
- To suppress lithium dendrite formation and improve battery performance.
Main Methods:
- Fabrication of a lithiophilic-zinc oxide/carbon nanotube sublayer and a lithiophobic carbon nanotube sublayer.
- Characterization of the interfacial layer's structure and properties.
- Testing of lithium-metal anodes in various battery configurations.
Main Results:
- The gradient layer effectively anchored to the lithium foil, promoting a stable solid electrolyte interphase.
- Suppression of mossy lithium formation and dendrite growth was observed.
- Ultralong-term stable lithium stripping/plating and improved cycle performance were achieved.
Conclusions:
- The lithiophilic-lithiophobic gradient interfacial layer is a promising strategy for next-generation lithium-metal batteries.
- The strategy demonstrates wide applicability and a simple fabrication process.
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