Figure 5.

(a) DSC profiles measured in reactions with EC-EMC/LiPF₆ battery solutions (LP57) of NCM85 undoped and molybdenum-doped materials, as indicated. The total heat evolved Q_t and the onset temperatures (indicated with arrows) are also shown; (b) enlarged temperature range of 55–85 °C, demonstrating the characteristic exothermal peak at ~75 °C assigned to the possible reactions of surface species like Li₂CO₃ and Li₂MoO₄ with solution. The main thermo-chemical reactions between NCM85 and solution species take place at 220–320 °C.