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Inter-layer-calated Thin Li Metal Electrode with Improved Battery Capacity Retention and Dendrite Suppression
Xi Chen1, Mingwei Shang1, Junjie Niu1
1Department of Materials Science and Engineering, CEAS, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, United States.
Nano Letters
|March 18, 2020
Summary
A novel inter-layer-calated lithium metal electrode using Ti3C2Tx MXene efficiently suppresses dendrite growth. This scalable approach enhances battery performance and energy density, even with limited electrolytes.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium metal batteries (LMBs) offer high energy density but suffer from dendrite formation and low Coulombic efficiency.
- Developing stable and efficient lithium metal anodes is crucial for next-generation energy storage.
Purpose of the Study:
- To develop a scalable and high-performance lithium metal anode using Ti3C2Tx MXene.
- To investigate the mitigation of lithium dendrite growth and improvement of cycling stability.
Main Methods:
- Fabrication of an inter-layer-calated lithium metal (ILC-Li) electrode with Ti3C2Tx MXene stacks on a Li host.
- Electrochemical characterization using symmetric and full cells under various cycling conditions.
- Analysis of the solid-electrolyte-interphase (SEI) formation and lithium deposition morphology.
Main Results:
- The ILC-Li electrode demonstrated suppressed dendrite growth due to the MXene's structural support and expanded interlayer space.
- Achieved high cycling stability with a small overpotential (<135 mV) over 1050 cycles at 10 mA cm-2 and 10 mAh cm-2.
- Full cells exhibited improved capacity retention and high energy density (366.6 Wh/kg), especially with lean electrolytes (2.5 μL mAh-1).
Conclusions:
- The Ti3C2Tx MXene-based ILC-Li electrode is a promising strategy for stable and high-energy-density lithium metal batteries.
- The scalable manufacturing process indicates significant potential for commercial applications in advanced battery technologies.
