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Updated: Jul 13, 2025

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

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

Published on: November 11, 2013

Si-Based High-Entropy Anode for Lithium-Ion Batteries.

Xincheng Lei^1,2, Yingying Wang¹, Jiayi Wang¹

¹National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.

|October 11, 2023

Summary

High-entropy alloys enhance silicon anodes for lithium-ion batteries, preventing cracking and improving stability. This innovation boosts energy density and cycling performance for next-generation batteries.

Keywords:

Li ion batteries Si anodes high entropy effect mechanical properties structural integrity

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Silicon anodes offer high energy density for lithium-ion batteries (LIBs) but suffer from particle cracking due to volume expansion during cycling.
Current commercial LIBs utilize limited silicon due to stability issues, hindering performance.

Purpose of the Study:

To develop a stable silicon-based anode material for LIBs using high-entropy alloys (HEAs).
To investigate the structural and electrochemical properties of HEA-Si anodes for improved cycling stability and energy density.

Main Methods:

Synthesis and characterization of micron-sized HEA-Si anodes.
Electrochemical testing, including capacity retention and cycling performance analysis.
In situ X-ray diffraction and transmission electron microscopy to study lithiation/delithiation mechanisms.

Main Results:

The HEA-Si anode demonstrated a capacity of 971 mAhg^-1 with 93.5% capacity retention after 100 cycles.
Compared to silicon-germanium anodes, HEA-Si anodes showed significantly enhanced structural stability.
In situ analyses revealed a reversible phase transformation between HEA and lithiated phases, ensuring intrinsic stability.

Conclusions:

Incorporating high-entropy elements into silicon anodes effectively mitigates volume expansion issues and enhances ductility.
HEA modification offers a promising strategy for designing stable, high-energy-density anode materials for advanced LIBs.