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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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Probing the Effectiveness in Stabilizing Lithium Metal Anodes through Functional Additives.
Chi-Cheung Su1, Xianyang Wu1, Khalil Amine1
1Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States.
ACS Applied Materials & Interfaces
|December 7, 2023
Summary
Cyclic fluorinated carbonates effectively stabilize lithium metal anodes, enhancing battery performance. A higher concentration of solid-electrolyte interphase (SEI) formers is recommended for improved lithium metal stabilization.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium metal anodes are crucial for high-energy-density batteries but suffer from instability.
- Electrolyte additives are commonly used to improve the stability of lithium metal anodes.
- Conventional additive strategies face challenges due to material consumption and electrolyte depletion.
Purpose of the Study:
- To comprehensively evaluate various electrolyte additives for stabilizing lithium metal anodes.
- To identify the most effective additives and understand failure mechanisms in lithium batteries.
- To propose improved strategies for lithium metal anode stabilization.
Main Methods:
- Multi-method evaluation of electrolyte additives for lithium anode stabilization.
- Analysis of lithium-copper (Li||Cu) cell performance.
- Investigation of electrolyte depletion and anode resistance during battery cycling.
Main Results:
- Cyclic fluorinated carbonates demonstrated superior performance in stabilizing lithium anodes compared to other additives.
- Electrolyte depletion and increased lithium metal anode resistance were identified as key contributors to battery failure.
- Conventional additive approaches showed insufficient protection due to additive consumption.
Conclusions:
- A combination of evaluation methods is necessary for reliable assessment of lithium anode stabilization.
- Higher concentrations (>15 wt %) of solid-electrolyte interphase (SEI) formers are recommended for effective lithium stabilization.
- Cyclic fluorinated carbonates represent a promising class of additives for enhancing lithium battery performance and longevity.
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