Sigray | Next-Generation Lab Nano-CT for Non-Destructive Imaging of NMC Battery Structures

Booth 1240

"The present study demonstrates the capabilities of the latest developments in laboratory X-ray nano-CT, using the latest-generation of high-brightness, nanofocus tubes, optimized high-resolution CMOS detector, and highly-stable operation environment, providing pixel sizes down to <150 nm. Using this setup, a series of non-destructive, high-resolution 3D characterizations of Nickel Manganese Cobalt (NMC) battery electrodes were carried out with voxel sizes as small as 150 nm, enabling detailed visualization and quantification of critical features like particle morphology, cracks, and conductive binder domains. Results from both isolated NMC half-cell electrodes and intact pouch cells will be presented, imaged at multiple length scales to capture the multi-scale heterogeneity inherent in real-world battery assemblies. The 3D imaging system revealed sub-600 nm cracks and voids within cathode particles, as well as variations in conductive binder domain texture that directly impact electronic conductivity and battery performance. Multi-scale imaging of packaged pouch cells enabled the identification of stress-inducing particle protrusions, heterogeneous pore distributions, and large pores, all of which are relevant to internal short circuit risk and transport pathway tortuosity.
These findings highlight the value of state-of-the-art, non-destructive, high-resolution 3D tomography for battery research and manufacturing quality control. We will also discuss the potential correlative microscopy techniques like high resolution micro-XRF that can further provide valuable insights into the electrode architecture and transformation operando.
By enabling comprehensive visualization of electrode architecture, particle distribution, and microstructural defects, this approach provides actionable insights for optimizing battery design, improving manufacturing processes, and enhancing the safety and efficiency of next-generation energy storage solutions."