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Related Experiment Video

Updated: Jan 16, 2026

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

Lithium-ion intercalation by coupled ion-electron transfer.

Yirui Zhang¹, Dimitrios Fraggedakis², Tao Gao²

¹Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Science (New York, N.Y.)

|October 2, 2025

Summary

Lithium-ion battery reactions are better understood through coupled ion-electron transfer. This mechanism, involving ion transfer and electron transfer to redox sites, explains battery performance and guides interface design.

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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

Area of Science:

Electrochemistry
Materials Science
Battery Technology

Background:

The fundamental reaction mechanisms governing lithium-ion battery operation are not fully elucidated.
Understanding these mechanisms is crucial for improving battery performance and longevity.

Purpose of the Study:

To investigate and clarify the reaction mechanism of lithium intercalation in lithium-ion batteries.
To provide experimental and theoretical evidence for a proposed coupled ion-electron transfer mechanism.

Main Methods:

Utilized electrochemical measurements across various electrode and electrolyte materials.
Employed theoretical modeling to support experimental findings and elucidate the reaction pathway.

Main Results:

Demonstrated that lithium intercalation proceeds via a coupled ion-electron transfer process.
Observed a universal correlation between (de-)intercalation rates and Li+ vacancy fraction.
Identified consistent temperature and electrolyte effects supporting the proposed theory.

Conclusions:

The coupled ion-electron transfer mechanism provides a unified explanation for lithium-ion battery intercalation.
Findings offer a framework for the rational molecular design of advanced lithium-ion battery interfaces.
This research advances the fundamental understanding of energy storage mechanisms.