The thickness of the electrode 𝐿𝐿 𝑒𝑒 and current collector 𝐿𝐿 𝑐𝑐𝑐𝑐 , the conductivity of the current collector λ 𝑐𝑐𝑐𝑐 and the total conductivity λ 𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑙𝑙 are known, therefore the conductivity of the electrode laminate λ 𝑒𝑒 can be calculated. This corresponds to 0.807 W m -1 K -1 and 3.793 W m -1 K -1 at 25 °C for the NMC811 and graphite composite laminates respectively, values measured between -5 °C and 55 °C are reported in Table . These thermal conductivities are in a similar range to reported values of 1.31 to 2.62 W m -1 K -1 and 0.68 to 2.62 W m -1 K -1 for NMC811 and graphite respectively. The thermal conductivity measurements were for the dry porous electrode, although the properties of the wetted electrode are required. The measurement included the contribution of the nitrogen purge gas and not the electrolyte, however N2 exhibits similar thermal conductivity (0.025 W m -1 K -1 ) to the electrolyte (0.03 W m -1 K -1 ) so the thermal conductivity of the wetted and dry electrode are assumed the same. The graphite and NMC thermal conductivities were fitted as interpolants in the model as low order polynomials did not provide good agreement.