fig4
From: High performance, low-cost rechargeable aluminum ion battery using Nb2CTx-MoS2 composite cathode
Figure 4. The XPS spectra depicting the change in position of binding energy of the major elements of the composite cathode before and after GCD process (A) XPS peaks for the Nb 3d core at fully charged state, (B) after discharging, (C) original composite cathode before GCD, (D) XPS peaks for the Al 2p at before charging, discharged, and fully charged stages, (E) XPS peaks for carbon in all three stages of original to charged.
