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Durable Lithium Metal Anodes Enabled by {110}-Textured Epitaxy on a LiF@Ag Commensurate Heterostructure
Liming Zhang1, Xuemin Wang1, Xiaotong Sun1
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, Shandong, 250061, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 8, 2025
Summary
Researchers developed a novel LiF@Ag heterostructure to stabilize lithium metal anodes (LMAs). This design suppresses dendrite growth, enhancing battery performance and cycle life for high-energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Lithium metal anodes (LMAs) offer high energy density but face challenges like lithium dendrite growth and unstable solid electrolyte interphases.
- Current strategies to mitigate these issues include designing heteroepitaxial substrates to guide lithium deposition.
- LiF and Ag are explored as substrate materials, but LiF has insufficient lithiophilicity and Ag can alloy with Li.
Purpose of the Study:
- To propose and investigate a LiF@Ag commensurate heterostructure as a novel substrate for stabilizing LMAs.
- To leverage the synergistic effects of LiF and Ag to promote uniform, dendrite-free lithium deposition with a {110} texture.
- To enhance the performance and cycle life of lithium metal batteries.
Main Methods:
- Fabrication of a LiF@Ag heterostructure with silver nanoparticles (NPs) uniformly grown on 2D LiF layers.
- Utilizing a composition pinning effect to prevent Li-Ag alloying and stabilize lithiophilic Ag NPs.
- Investigating the Li adatom diffusion barrier and heteroepitaxial deposition using the LiF@Ag substrate.
- Evaluating the performance of LMAs in full cells, focusing on coulombic efficiency, high-rate capability, and cycle life.
Main Results:
- Achieved ultra-dense and dendrite-free lithium heteroepitaxial deposition with a prominent {110} texture.
- Demonstrated suppressed Li dendrite formation and parasitic reactions through stabilized lithiophilic Ag NPs.
- Observed significantly reduced Li adatom diffusion barriers compared to LiF alone, promoting heteroepitaxy.
- Enabled improved coulombic efficiency, enhanced high-rate capability, and prolonged cycle life in Li metal full cells.
Conclusions:
- The LiF@Ag commensurate heterostructure effectively stabilizes LMAs by regulating both deposition thermodynamics and kinetics.
- This synergistic strategy promotes high-performance {110}-textured LMAs, overcoming limitations of individual LiF and Ag substrates.
- Constructing commensurate heterostructures presents a promising new approach for developing advanced lithium metal batteries.
