Figure 6.

Summary of relevant electrochemical measurements in a symmetrical two-electrode cell setup of MDF Ni H₂O 1000 °C. (a) Representative CV curves at different sweep rates ranging from 5 to 200 mV·s^–1. (b) Typical galvanostatic charge/discharge curves at different specific currents. (c) Variation of specific capacitance as a function of specific current from 20 mA·g^–1 to 100 A·g^–1. (d) Variation of specific capacitance as a function of cycle number, measured up to 10,000 cycles at a rate of 2 A·g^–1.