Preparation Method of Co₃O₄ Nanoparticles Using Degreasing Cotton and Their Electrochemical Performances in Supercapacitors

Figure 3

XPS spectra of the Co-600:(a) Co 2p spectra of Co-600, (b) O 1s spectra of Co-600, (c) C 1s spectra of Co-600, and (d) full survey scan spectrum of Co-600.

(a)

(b)

(c)

(d)