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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

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Published on: June 23, 2017

Robust Silicon-Based Anode with High Energy Density upon Dual Welding Encapsulation.

Wenhui Lai¹, Jong Hak Lee², Zhen Yuan Yeo³

¹Department of Material Science and Engineering, National University of Singapore, Singapore 117575, Singapore.

|October 22, 2025

Summary

This summary is machine-generated.

Researchers developed a dual welding strategy for silicon anodes in lithium-ion batteries. This method enhances stability and suppresses volume expansion, enabling high energy density and stable cycling for commercial silicon batteries.

Keywords:

dual welding encapsulation lithium-ion batteries machine learning silicon anodes spark plasma sintering

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Silicon anodes offer high theoretical capacity for lithium-ion batteries.
Volume expansion and weak interfacial contact limit silicon anode practical application.
Structural instability arises from large volume changes during battery cycling.

Purpose of the Study:

To develop a novel dual welding encapsulation strategy for silicon anodes.
To enhance interfacial contact and structural stability of silicon anodes.
To investigate the underlying mechanisms using advanced characterization techniques.

Main Methods:

Constructing Si-C chemical bonds between silicon and carbon shells.
Establishing C-C interlayer bonding among carbon shells.
Utilizing machine-learning-enhanced transmission electron microscopy for interface analysis.

Main Results:

The dual welding mechanism significantly improves the mechanical strength of the carbon shell.
Sustained electrical connection is ensured via Si-C bonds, mitigating interfacial instability.
Volume expansion was suppressed below 12% after 300 cycles.
Full cells achieved a high energy density of 576 Wh kg⁻¹ with stable cycling.

Conclusions:

The dual welding strategy effectively addresses silicon anode instability.
This approach paves the way for the commercialization of high-performance silicon-based batteries.
The findings inspire new designs for robust anode materials in energy storage.