Comparison of experimental FC shifts of Li in olivine LiMPO4 (M = Mn, Fe, Co, and Ni) with the computational results obtained with different approaches (T = 310 K). The effective potential (Ueff) in GGA + U is given in Ry unit, while the hybrid functionals (HyF1 of HyF2) mixing parameters are reported: a = 0.35 (Mn, Co, and Ni); a = 0.5 (Fe). Reproduced from ref. 83 with permission from American Chemical Society, Copyright 2012.