Fig. 5

a CV curves of NiCo-LDH-1 at different scan rates; b CV curves of samples at scan rate of 5 mV s⁻¹; c GCD curves of NiCo-LDH-1 at different current densities; d GCD curves of samples at 1 A g⁻¹; e cyclic stability diagram of NiCo-LDH-1, NiCo-LDH-2, NiCo-LDH-3 and NiCo-LDH-0 at 10 A g⁻¹; f Nyquist plots of NiCo-LDH-1, NiCo-LDH-2, NiCo-LDH-3 and NiCo-LDH-0