Effects of contact (through-bond) and electron–nuclear spin dipolar interactions (through-space) on the NMR signal obtained for (a) a magnetically isotropic and (b) a spin–orbit coupled paramagnetic system. Simulated solid-state NMR (powder) spectra are depicted under static conditions. Experimental spectra for the LiMnPO4 and LiFePO4 Li-ion cathodes were collected at 11.75 T at 60 kHz MAS using a double adiabatic spin echo sequence. For LiMnPO4 with an isotropic magnetic susceptibility, the chemical shift is largely determined by the Fermi contact shift. For LiFePO4 with an anisotropic susceptibility tensor, the shift likely contains contributions due to both the Fermi contact and pseudo-contact mechanisms, of which the former is expected to dominate.54 Adapted from ref. 54 with permission from American Chemical Society, Copyright 2012.