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Related Experiment Video

Updated: Jun 9, 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

Imaging in-operando LiCoO₂ nanocrystallites with Bragg coherent X-ray diffraction.

David Serban^1,2, Daniel G Porter³, Ahmed H Mokhtar⁴

¹Department of Physics & Astronomy, University of Southampton, Southampton, UK. das1g13@soton.ac.uk.

Communications Chemistry

|October 28, 2024

Summary

Researchers used X-ray diffraction imaging to study lithium cobalt oxide (LCO) in lithium ion batteries. They observed domain dynamics during cycling, revealing inefficiencies that limit battery performance and lifespan.

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Last Updated: Jun 9, 2025

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Published on: November 11, 2013

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Lithium cobalt oxide (LCO) is a key cathode material in commercial lithium ion batteries (LIB).
Despite LCO's high stability, LIB performance improvements face challenges.
Optimizing LCO battery cycling is crucial for advancing energy storage.

Purpose of the Study:

To investigate the in-operando structural properties of LCO during battery cycling.
To identify mechanisms contributing to inefficiencies in LCO batteries.
To provide insights for optimizing LCO battery performance and longevity.

Main Methods:

Utilized Bragg Coherent X-ray Diffraction Imaging for in-operando analysis.
Studied a single LCO nanocrystal (approx. 1.6 × 1.4 × 1.3 μm³).
Reconstructed X-ray scattering phase variations to map atomic displacements.

Main Results:

Observed the formation, expansion, and fragmentation of strained domains on the LCO nanocrystal surface during charging.
Determined maximum relative lattice displacements of 0.467 Å during charging.
Observed reverse domain dynamics during discharging with lower maximum relative lattice displacements (0.226 Å).

Conclusions:

The study reveals strain-induced domain dynamics within LCO lattices during charge/discharge cycles.
These domain dynamics contribute to increasing inefficiencies in LCO batteries.
Understanding these processes is key to developing strategies for enhanced LCO battery cycling and stability.