The integral of the CO2 MS spectrum in Fig. , Fig. , and Fig. is calculated for BM1, BM2, and BM3, respectively, and equation ( ) is employed to calculate the carbon amount (wt. %). Since this method does not account for the CO gas produced from the combustion process, it provides an approximate quantification of carbon content. Fig. shows the calculated carbon amount (wt. %) for BM samples as well as for pyrolyzed BM samples (TGA/MS analyses of pyrolyzed BM is shown in Fig. ). Carbon content in BM1, BM2, and BM3 is determined to be 40.5 wt. %, 40.6 wt. % and 50.2 wt. %, respectively, while in pyrolyzed BM1, BM2 and BM3, it is 36.4 wt. %, 36.9 wt. % and 47.8 wt. %, respectively. In both instances, the BM3 sample shows ~10 wt. % higher carbon content compared to BM1 and BM2. The results in Fig. also reveal that carbon content in pyrolyzed BM is ~4 wt. % less compared to BM samples without pyrolysis. This can be attributed to the removal of most of the PVDF and other organics due to pyrolysis. Fig. shows the XRD spectra of BM1 and residues left from TGA/MS analysis of BM1, where the crystal structure of NMC in residue from oxidative TGA/MS is relatively intact and graphite is completely combusted. While XRD of residue from inert TGA/MS shows a complete reduction of NMC. These findings further confirm the reports that in the presence of oxygen, graphite takes part in the combustion reaction which has allowed for its quantification using the developed method. Fig. shows the carbon content (wt. %) in the four sieved fractions (+150 µm, -150+90 µm, -90+63 µm, and -63 µm) of BM1, calculated by applying the developed method on TGA/MS analyses of each sieved fraction (shown in Fig. ). Fig. implies that the carbon is primarily concentrated in the finer size fractions of the BM1. Understanding the distribution of carbon across different particle sizes is crucial for optimizing the recycling process, as it allows for targeted processing based on the distinct properties of each fraction.