Synthesis and characterisation of amorphous MnO2/CNT via solid-state microwave for high-performance supercapacitors

Summary Amorphous MnO 2 was attached to carbon nanotubes (CNTs) in 60 seconds by solid-state microwave method. As electrodes in supercapacitors, the coactions of the MnO 2 and CNT augmented the actual value of capacitance to 1250 F g −1 , and cycle steadiness held 80% of the starting value after 7000 cycles. The equipped MnO 2 /CNT//AC asymmetric supercapacitor (ASC) manifested preferable energy density with 33.5 Wh kg −1 (at 400 W kg −1 ). Its glorious electrochemical properties of MnO 2 /CNT demonstrated that the microwave method has great potency to realise the composite of electrode materials.