Fig. 3. Electrochemical performance of Zn_xCo_1−xO NRs as compared with P-Zn_xCo_1−xO NRs.

(A) CV curves at 50 mV s⁻¹. (B) Specific capacity as a function of sweep rate between 5 and 1000 mV s⁻¹. (C) Capacitance retention of Zn_0.04Co_0.96O NRs by galvanostatic cycling at 10 A g⁻¹, with the inset showing galvanostatic cycling profiles collected at 1, 2, 5, 10, and 100 A g⁻¹. (D) Deconvolution of the charge contribution as a function of scan rates, indicating that Zn_0.04Co_0.96O NRs facilitate fast electrochemical reaction, resulting in higher capacity contributed dominantly from the v-dependent charge.