Figure 1From: Nitrogen-doped, FeNi alloy nanoparticle-decorated graphene as an efficient and stable electrode for electrochemical supercapacitors in acid medium XRD pattern, XPS spectra, FE-SEM image, and EDX. XRD pattern (a), XPS spectra (b), FE-SEM image (c), and the corresponding EDX (d) for the N-doped FeNi@Gr after the calcination process.Back to article page