It is important to directly measure the thermal properties of the electrodes as microstructure significantly effects heat transport and generation within the battery. However, due to difficulty extracting any usable quantity of electrolyte, the thermal properties of a known electrolyte 1 mol dm LiPF6 in 1:1:1 EC:EMC:DMC (v:v) was used (this is dissimilar from the electrolyte used in the electrochemical tests and model which is 1 mol dm -3 LiPF6 in 3:7 EC:EMC (v:v)). The heat capacity and thermal conductivity of this electrolyte were used in the following section as LiPF6 in carbonate electrolytes are assumed to have similar properties and the model is not significantly sensitive to electrolyte parameters, the information is summarised Table . The following measurements were carried out on materials extracted from a cell fully discharged to 2.5 V i.e. 0% SoC. The effect of lithiation on the thermophysical properties of these materials was not considered here due to the difficulty in maintaining air stability at higher states of charge. It should be noted that the state of lithiation does significantly influence heat transport properties as described in a previous work, it was shown that the thermal diffusivity only changed by 15% for LiNi1-x-yMnxCoyO2 across the whole lithium stoichiometry range. In practice, the change would be less significant as the materials are never fully lithiated/delithiated.