The battery investigated was a 5 Ah M50 21700 cylindrical cell manufactured by LG Chem. This cell utilises nickel-rich NMC811 and SiOy-graphite active materials. To extract the components the cell was discharged and disassembled in a glovebox. The teardown methodology has been described previously and detailed chemical and physical composition can be found in Table . During the teardown the gravimetric and volumetric contribution of each component was measured: the jellyroll was weighed immediately after disassembly, and again after the electrolyte had been evaporated to evaluate solvent content. The anatomy of the cell was detailed and the components were separated for individual analysis. To evaluate the mass of electrode coating the current collectors were delaminated. The positive electrode was soaked in N-methyl-2-pyrrolidone (NMP) and sonicated at 70 °C to remove the coating. The negative electrode coating was removed using water. The measured weight of the bare current collectors was used to calculate the total black mass for each electrode. The electrode black mass was used to measure specific heat capacity. For further characterisation, a pristine cell was dismantled, and fresh electrodes extracted. For the electrochemical testing, one side of the coating had to be removed and to measure the thermal conductivity the double-sided electrode was left intact.