Fig. 5. (a) CV curves of LDN and LDH electrodes at a scan rate of 10 mV s⁻¹, (b) CV curves of Ni₂Cr₁-LDNs at various scan rates from 5 to 100 mV s⁻¹, (c) GCD curves of LDNs and LDHs at a current density of 2 A g⁻¹, and (d) specific capacitances of LDN and LDH electrodes at different current densities.