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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

Stamping Flexible Li Alloy Anodes.

Jinlong Gao¹, Chaoji Chen¹, Qi Dong¹

¹Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.

Advanced Materials (Deerfield Beach, Fla.)

|February 11, 2021

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Researchers developed a new method to create ultrathin, flexible lithium-tin (Li-Sn) alloy anodes for batteries. This innovation enhances safety and performance, paving the way for next-generation energy storage solutions.

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium metal anodes offer high capacity but face challenges in processing for safe, high-performance thin-film anodes.
Developing stable and efficient thin-film anodes is crucial for advancing battery technology.

Purpose of the Study:

To develop a novel method for preparing ultrathin, flexible lithium-tin (Li-Sn) alloy anodes.
To demonstrate the electrochemical performance and safety benefits of these Li-Sn alloy anodes.
To explore the potential of this method for other metal and alloy anodes.

Main Methods:

Direct stamping of a molten Li-Sn alloy solution onto various substrates.
Fabrication of anodes with a thickness of approximately 15 µm.
Electrochemical testing of Li-Sn alloy anodes in flexible Li-ion batteries with commercial NMC cathodes.

Keywords:

Li anodes Li dendrites Li-metal batteries flexible batteries stamping

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Main Results:

Achieved ultrathin (15 µm) and flexible Li-Sn alloy anodes with an areal capacity of ≈3 mAh cm⁻².
Demonstrated mitigation of lithium dendrites and reduced overpotential (<10 mV at 0.25 mA cm⁻²) during Li stripping/plating.
Showcased good electrochemical performance and stable operation of flexible Li-ion batteries after repeated deformation.

Conclusions:

The direct stamping method enables the production of high-performance, ultrathin Li-Sn alloy anodes.
Li-Sn alloy anodes offer improved safety and electrochemical properties compared to pure lithium.
This approach is extendable to other alkali and alkaline earth metal anodes, opening avenues for next-generation batteries.