Figure 8 | Scientific Reports

Figure 8

From: Hierarchical Core/Shell NiCo2O4@NiCo2O4 Nanocactus Arrays with Dual-functionalities for High Performance Supercapacitors and Li-ion Batteries

Figure 8

Electrochemical performance of LIBs: (a, b)

CV curves of the NiCo2O4@NiCo2O4 NCA and NiCo2O4 NCA electrodes at a scan speed of 0.5 mV s−1 in the voltage ranging 0.01–3.0 V vs. Li; (c) galvanostatic discharge/charge profiles of the NiCo2O4@NiCo2O4 NCA anode at a current density of 120 mA g−1; (d) cyclic performance at 120 mA g−1; (e) rate capabilities measured at different current densities; (f) electrochemical impedance spectra after 100th cycles of the two anodes.

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