Two-phase interface in LiMnPO4 nanoplates

► Synthesis and orientation of LiMnPO4 nanoplatelets. ► Orientation of MnPO4/LiMnPO4 two-phase interface versus ID Li-diffusion channels. ► Strain across and mobility of the MnPO4/LiMnPO4 two-phase boundary in Li1−xMnPO4.