Research Article

Enhancement of the Electrochemical Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Material by Double-Layer Coating with Graphene Oxide and SnO2 for Lithium-Ion Batteries

Figure 2

SEM images of pristine NCM (a) and GO-SnO2-NCM cathodes (b).
(a)
(b)