Compositionally variant bimetallic Cu–Mn oxysulfide electrodes with meritorious supercapacitive performance and high energy density

Abstract

The fabricated asymmetric supercapacitor device (Cu 3 Mn 1 OS//AC) exhibits a very high energy density of 76.56 W h kg −1 along with a power density of 985.01 W kg −1 at 1 A g −1 with superior electrochemical stability and efficiency over 10 000 cycles.