Dataset for Edge Exposure and Electrochemical Modulation of Graphene Oxide by Focused Cu Ion Bombardment

This dataset supports the study on manganese oxide nanofibers synthesized via electrospinning, evaluated as a bifunctional electrode platform for supercapacitor and zinc-ion capacitor devices. It includes raw and processed data from XRD, FTIR, Raman spectroscopy, BET surface area analysis, SEM, EDX mapping, XPS, cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). Electrochemical measurements were carried out using both three-electrode and symmetric device configurations in aqueous PVA/H2SO4 electrolytes.