One-step microwave synthesis of CoSb for high-performance wearable flexible supercapacitor

The activated carbon felt with uniform loading of CoSb nanomaterials is obtained by microwave radiation. Impressively, electrochemical tests show that the capacitance value of CoSb at 1 A g(-1) is 1311.0 F g(-1), and after 20,000 cycles, the capacitance retention rate is 81.5%. The assembled asymmetric flexible capacitor has a voltage window of 1.8 V. The energy density and power density of the device are 24.3 W h Kg(-1) and 921.0 W kg(-1), respectively. The electrochemical performance of the device is not affected under bending conditions.