Binding energies between dopants and V ′ Li give an indication of whether or not a dopant acts as a trapping point. Substantial binding energies could in turn result in reduced Li-ion mobility, and thus a reduced ionic conductivity. The binding energies displayed in Table were calculated by subtracting the energy of a cell with a defect pair, where the defect related to a dopant is located close to (∼ 3 Å) a V ′ Li , from the energy of a cell, where they are located far away (∼ 6 Å) from each other. Neutral cells (q = 0) were used for all calculations. The shortest distance between two Li 8a sites is ∼ 6 Å, and therefore there are no calculated binding energies for Al(Ga) Li 8a with V ′ Li 8a . This is also true for A couple of the defect pairs show negative binding energies which means that the V ′ Li is repelled by the dopant. At RT k B T ∼ 0.025 eV, and thus defect pairs with binding energies lower than 0.025 eV will not be noticeably affected by this barrier. However, small binding energies can contribute to a slight increase in migration barriers.