Composite g-C₃N₄/NiCo₂O₄ with Excellent Electrochemical Impedance as an Electrode for Supercapacitors

Figure 2

SEM pictures of (a, b) g-C₃N₄; (c, d) NiCo₂O₄; (e, f) g-C₃N₄/NiCo₂O₄ samples.