The lowest attenuation is observed at the centres of the particles and propagates outward, which is characteristic of electrochemically induced crack formation in these materials (see Figure ). This pattern observed here confirms that the reduction in greyscale is not due to low-attenuating lithium deposits and is a result of crack formation. Using higher resolution imaging such as FIB-SEM and nano-XCT has proven that the delithiation of NMC811 particles causes cracking, and supports that delithaitaion will cause cracking to form in the centre of particles. The approach detailed here offers advantages over higher-resolution instruments, including a larger field of view (FoV) that enables the assessment of more particles over a greater area of the electrode with statistical relevance. Additionally, the sample requirements are less stringent here and allows for the use of a commercially relevant pouch cell architecture, providing more meaningful results and enabling sequential imaging of the same region across multiple electrochemical states without exposure to air or moisture. Figure illustrates line scans of the greyscale profile in an exemplar particle. The grey scale value at the particle's centre is lower during charge (4.2 and 4.4 V) compared to the pristine and fully discharged state (2.5 V), see Figure b-e. It should be noted that pure absorption contrast is not obtained during this experiment. This is clear from the brighter 'ring' around the particle edge that results from in-line phase contrast enhancement, and the transition of the beam through materials of different density (see Figure ). The background does not exhibit a consistent grey level, with slight dark artefacts appearing due to the reconstruction process. However, these artefacts do not affect the NMC voxels for two main reasons: 1) If the streaking in the background were also affecting the NMC, we would observe a consistent high level of cracking in the pristine data and at all states of charge. This is not the case, as the streaks are stable in space between scans, meaning the effect would be consistent when tracking grey level changes in particles between scans. Line scan analysis shows varying values in the NMC phase at different voltages; and 2) this artefact is more likely a result of reconstruction, caused by beam hardening when X-rays pass through two phases with significantly different mass attenuation coefficients. Since the NMC phase has a much higher attenuation coefficient than the surrounding polymer binder and carbon additives, this texturing is specific to the background phase. This initial analysis is an indication that it is possible to confirm the presence of both cracking that has been induced due to the cell potential (lithiation state of the particle), and also particle reformation phenomenon occurring in early cycles in this data set. This manual crack identification also allows us to confirm electrochemical activity within the imaged area, which is a common concern for more bespoke operando cell designs in a variety of electrochemical systems. However, manual analysis is both laborious and non-quantitative, and thus an automated analysis of each particle in the sample volume was carried out for subsequent analysis.