Advanced asymmetric supercapacitors based on Ni 3 (PO 4 ) 2 @GO and Fe 2 O 3 @GO electrodes with high specific capacitance and high energy density

Ni 3 (PO 4 ) 2 @GO and Fe 2 O 3 @GO have been successfully synthesized as electrode materials, and they have been used to assemble an asymmetric supercapacitor (Fe 2 O 3 @GO//Ni 3 (PO 4 ) 2 @GO), which exhibited a high energy density.