For the electrodes, this property cannot be determined from the powder as it is influenced by microstructure. Instead, the through-plane thermal diffusivity of the double-side coated electrode is measured. The through-plane thermal diffusivity and calculated specific heat capacities of the double-sided electrodes are illustrated in Table . The overall specific heat capacity of the electrodes were calculated using the heat capacities and mass fractions (Figure ) of the black mass and current collectors. The area density of the positive electrode was attributed to 8.1% aluminium and 91.9% NMC coating, whereas the area density of the negative electrode was attributed to 26.6% copper and 73.4% graphite coating.