Fermi level in all growth conditions. Since the ideal synthesis/anneal temperature for the ordered phase is at 700 °C, 973 K is used as the input temperature to determine the selfconsistent Fermi levels. The chemical potential conditions A → T are arranged with increasing self-consistent Fermi level. To understand the defect behaviour at room/operating temperature, self-consistent Fermi levels were also calculated with constant non-lithium defect concentrations upon cooling (i.e. "frozen in"). While the kinetic barriers of non-lithium defects can be assumed to be large, the same assumption can not be applied to lithium defects (Li i and V Li ) as the facile movement of Li + is one of the desirable features for a cathode. In addition, it has been suggested that some lithium vacancy-interstitial pairs would recombine (i.e. the reverse reaction of Frenkel pair formation) at lower temperatures. Two variations of the "frozen" approach were applied. The former approach only allowed V Li and Li i concentrations to vary, whereas the latter also allowed Li Mn and Li Ni concentrations to change.