Figure summarizes the delithiation mechanisms and tilt grain dynamics of the measured particle. The onset of both transition supports the mechanisms proposed in our previous work where we observed different mechanisms for the two phase transitions. The first Li 1 -Li 0.5 phase transition follows a "phase-field" mechanism, growing from multiple points on the surface. During the second Li 0.5 -Li 0 phase transition, the Li 0 phase grows over the surface of the crystal, forming a more homogeneous core-shell morphology right from the start of delithiation.