Fig. 4
From: Nanostructured (Co, Mn)3O4 for High Capacitive Supercapacitor Applications
a CV curves of the (Co, Mn)3O4 electrode at different scan rates in the potential range of 0–0.55 V. b The discharge curves of the (Co, Mn)3O4 electrode at different current densities. c Dependences of the discharge specific capacitance on the charge/discharge current densities. d Specific capacitance of (Co, Mn)3O4 electrode materials as a function of cycle number recorded at a current density of 20 A g−1. e Nyquist plots of different (Co, Mn)3O4 electrodes in a frequency range from 10-2 to 105 Hz measured (inset: the magnification of the high frequency region of the impedance spectra)