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Updated: Oct 19, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Published on: November 11, 2013

Carbon-free high-loading silicon anodes enabled by sulfide solid electrolytes.

Darren H S Tan¹, Yu-Ting Chen¹, Hedi Yang¹

¹Department of NanoEngineering, University of California San Diego, La Jolla, CA 92093, USA.

Science (New York, N.Y.)

|September 23, 2021

Summary

This summary is machine-generated.

Stable silicon anodes for lithium-ion batteries are now possible using sulfide solid electrolytes. This breakthrough prevents interface degradation, enabling high-performance batteries with improved safety and longevity.

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Silicon anodes offer high theoretical capacity for lithium-ion batteries but suffer from poor interfacial stability with liquid electrolytes.
This instability leads to continuous interfacial growth and irreversible lithium losses, hindering practical application.

Purpose of the Study:

To develop a stable microsilicon anode for lithium-ion batteries.
To investigate the use of sulfide solid electrolytes for interface passivation.

Main Methods:

Utilized sulfide solid electrolytes to passivate the interface of a 99.9% microsilicon anode.
Performed bulk and surface characterization to analyze interfacial components.
Assembled and tested microsilicon full cells under various conditions.

Main Results:

The sulfide solid electrolyte effectively eliminated continuous interfacial growth and irreversible lithium losses.
Microsilicon full cells demonstrated high areal current density, a wide operating temperature range, and high areal loadings.
Characterization confirmed stable interfaces between microsilicon and sulfide electrolytes.

Conclusions:

Sulfide solid electrolytes enable stable operation of high-loading microsilicon anodes in lithium-ion batteries.
The stable interface and favorable chemomechanical properties of lithium-silicon alloys contribute to enhanced battery performance.