Figure 4

(a) CV curves of the CF, CoMoO₄ NWs, NiMoO₄·xH₂O NSs, and CoMoO₄@NiMoO₄·xH₂O core-shell heterostructures at a scan rate of 5 mV s⁻¹; (b) CV curves of CoMoO₄@NiMoO₄·xH₂O at the scan rate between 5 and 100 mV s⁻¹; (c) Charge and discharge curves of CoMoO₄@NiMoO₄·xH₂O at different current densities ranged from 1 to 15A g⁻¹; (d) Plots of the current density against specific capacitances of the CoMoO₄ NWs, NiMoO₄·xH₂O NSs and CoMoO₄@NiMoO₄·xH₂O core-shell heterostructures electrodes obtained from the galvanostatic charge-discharge curves; (e) Cycling performance of CoMoO₄ NWs, NiMoO₄·xH₂O NSs and CoMoO₄@NiMoO₄·xH₂O core-shell heterostructures at a discharge current density of 1A g⁻¹; (f) Nyquist plots of CoMoO₄ NWs, NiMoO₄·xH₂O NSs and CoMoO₄@NiMoO₄·xH₂O core-shell heterostructures.