Fig. 3.

Electrochemical performance of KTNO/rGO-12 and KTNO. a, b CV curves of KTNO and KTNO/rGO-12 at 0.1 mV s⁻¹. c, d Galvanostatic charge–discharge curves of KTNO and KTNO/rGO-12 at 20 mA g⁻¹