Figure 3

(a) CV curves of NiCo₂O₄ at various scan rates in KOH electrolyte, (b) CV curves of NiCo₂O₄ at various bending angles in KOH, (c) Charge-discharge characteristics of NiCo₂O₄ in various electrolytes and (d) Ragone plots of NiCo₂O₄ in various electrolytes.