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Toward Dendrite-Free Metallic Lithium Anodes: From Structural Design to Optimal Electrochemical Diffusion Kinetics
Jian Wang1,2,3, Linge Li1, Huimin Hu1
1i-Lab and CAS Key Laboratory of Nanophotonic Materials and Devices, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China.
ACS Nano
|October 28, 2022
Summary
Researchers are developing strategies to prevent lithium dendrite formation in high-energy batteries. This involves engineering interfaces, designing current collectors, and using electrochemical catalysts to improve lithium plating for longer battery life.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium metal anodes offer high energy density but suffer from dendrite formation, solid electrolyte interphase (SEI) instability, and volume expansion, limiting battery lifespan.
- Current research primarily focuses on inhibiting dendrite growth to enhance battery longevity.
Purpose of the Study:
- To review and discuss strategies for improving lithium metal anode performance.
- To highlight advancements in interfacial engineering, current-collector design, and electrochemical catalysis for lithium deposition.
Main Methods:
- Review of robust solid electrolyte interphase (SEI) fabrication strategies (inorganic, organic, hybrid).
- Summary of metallic and carbon-based 3D current collectors as lithium hosts.
- Assessment of alloy compounds and atomic metal catalysts for accelerating lithium ion/atom diffusion.
Main Results:
- Engineered SEIs enhance stability and prevent dendrite formation.
- 3D current collectors reduce local current density and promote uniform lithium deposition.
- Catalytic methods accelerate lateral lithium diffusion, leading to smoother plating.
Conclusions:
- Interfacial engineering, advanced current collectors, and electrochemical catalysis are key to achieving dendrite-free lithium metal anodes.
- Modulating diffusion kinetics is crucial for realizing stable, high-performance lithium metal batteries.
