Figure 4: Effect of atomic-level surface modification.
From: A stable lithium-rich surface structure for lithium-rich layered cathode materials
(a,b) HAADF-STEM images of (a) the pristine electrode and (b) the surface-modified electrode with 5 wt% Li2MnO3 after the first charge. a,b were obtained along the rhombohedral [100] (=cubic spinel [110]) and monoclinic [100] directions, respectively. (c) Nyquist plots of both electrodes after the tenth and hundredth cycles. (d) Graphical illustration of the effect of the surface modification. The green, purple, red, orange and blue circles represent Li, TM (M=Ni, Co and Mn), O, Mn and Ni, respectively. Scale bars, 5 Å.
