Figure 5
Electrochemical characterization of α-Ni(OH)2 nanosheets: (a) discharge curves; (b) specific capacitance as a function of current densities; (c) average specific capacitance versus cycle number, the inset shows the galvanostatic charge-discharge curves at current density of 4 A g−1; (d) Nyquist plots before and after cycling at current density of 4 A g−1, (inset) equivalent fitting circuit and impedance at high frequency region.
