Operando full-field coded-aperture hyperspectral fluorescence tomography studies of the comparative spatial performance of lithium-ion batte

Despite progress in alternative battery technologies, such as using solid electrolytes, Lithium-ion Batteries (LiB) with Nickel Manganese Cobalt (NMC) and Lithium iron Phosphate (LFP) cathodes make up to 60% and 30% of worldwide battery production respectively. There are significant disagreements between manufacturers regarding the two technologies, with cobalt mining being linked to human exploitation, and LFP having lower energy density. Questions remain on how battery geometry, cathode metal crossover, and temperature affect the battery performance. By leveraging the speed and precision of new pixelated photon counting detectors (PCD), we have developed Full-Field Hyperspectral Synchrotron X-ray Fluorescence Tomography, providing 3D fluorescence data without the need for raster scanning. We are currently at a stage where we can capitalize on its potential with operando and in-situ studies, and we will introduce coded apertures to study the performance of NMC811 and LFP LiBs in 3D.