Figure 3
From: Copper sulfide nanoparticles as high-performance cathode materials for Mg-ion batteries
Ex situ XPS (a,b,c) and EDX (d) measurements of electrodes composed of CuS NPs after discharge and charge. Atomic ratios of S, Cu and Mg for pristine, discharged and charged CuS NPs derived from corresponding XPS spectra are shown in the Table S1. The intensities of EDX spectra were normalized to the intensity of Cu peaks. Prior to these measurements, the electrodes were rinsed from the Mg electrolyte with pure tetraglyme.
