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In situ visualization of multicomponents coevolution in a battery pouch cell.

Guibin Zan1, Guannan Qian1, Sheraz Gul2

  • 1Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025.

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|July 20, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a new X-ray imaging technique to visualize lithium-ion battery (LIB) degradation in real-time. This method reveals submicron structural changes and lithium plating, crucial for improving battery performance and safety.

Keywords:
high resolutionin situ three-dimensional imaginglaboratory computed laminographylithium-ion batterypouch cell

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-ion batteries (LIBs) are vital for energy storage, but performance limitations necessitate understanding degradation mechanisms.
  • Improving rate capability, cyclability, energy density, safety, and cost efficiency requires detailed insights into structural evolution.
  • Current methods often lack the resolution or in situ capabilities to fully capture battery operational dynamics.

Purpose of the Study:

  • To present a novel laboratory-based X-ray micro-computed laminography approach for in situ visualization of LIBs.
  • To enable high-resolution, high-throughput imaging of industry-relevant lithium-ion pouch cells.
  • To correlate multiscale structures, degradation, and electrochemical behavior in large-scale battery cells.

Main Methods:

  • Development and application of a laboratory-based X-ray micro-computed laminography system.
  • In situ imaging of an industry-relevant lithium-ion pouch cell.
  • Achieving a spatial resolution of 0.5 μm for identifying submicron features within electrodes.

Main Results:

  • Demonstrated superior detection fidelity, resolution, and reliability in imaging LIB pouch cells.
  • Successfully identified submicron structural features within cathode and anode electrodes.
  • Directly visualized lithium plating, a key phenomenon in fast charging and low-temperature cycling.

Conclusions:

  • The developed X-ray laminography technique offers a powerful tool for understanding LIB degradation.
  • Enables direct visualization of critical failure mechanisms like lithium plating.
  • Provides a pathway to correlate structural changes with electrochemical performance in industrial-scale batteries.