fig9

Figure 9. Device-level electrochemical performance of the PANI/m-CFs symmetric supercapacitor and bending stability of the electrode. (A) CV curves at scan rates of 10-50 mV/s; (B) GCD curves at current densities of 1, 2, 5, and 10 mA/cm²; (C) Nyquist plot and fitted curve, with the equivalent circuit used for fitting shown in the inset; (D) Areal capacitance calculated from the GCD curves at different current densities; (E) Corresponding area energy density (blue bars) and area power density (red bars); (F) CV curves of the electrode at bending angles of 0°, 40°, 80°, and 120°; the inset photograph was taken by the authors. PANI: Polyaniline; m-CFs: modified cellulose fibers; CV: cyclic voltammetry; GCD: galvanostatic charge-discharge; CPE: constant phase element; R_s: series resistance; R_ct: charge-transfer resistance; R_W: Warburg impedance.