MnCoP hollow nanocubes as novel electrode material for asymmetric supercapacitors

• Hierarchical nanosheet-based MnCoP hollow nanocubes were synthesized and characterized. • MnCoP has uniform morphology, electrical conductivity, structural stability and large surface area. • As a battery-type positive electrode, MnCoP showed a maximum capacity of 879 Cg −1 at 2 Ag −1 . • Superior cycling stability of 94.4% capacitance retention after 6,000 cycles achieved. • Maximum energy density of 66.98 Wh Kg −1 and power density of 16466 W Kg −1 were found. Fabrication of novel and efficient electrodes for green and renewable hybrid energy storage systems is an effective approach to deal with energy crisis. In this work, hierarchical nanosheet-based MnCoP hollow nanocubes electrode with the battery type feature has been successfully synthesized by a simple hard and soft acid-base (HSAB) approach followed by a heat treatment. By taking advantage of the remarkable merits including uniform morphology, electrical conductivity, structural stability, large surface area as well as the battery type feature, the nanosheet-based MnCoP hollow nanocubes electrode exhibits enhanced electrochemical performance with high specific capacity of 879C g −1 at 2 A g −1 excellent cycling stability of 94.4% capacity retention after 6,000 cycles, and maximum energy and power density of 66.98 Wh Kg −1 and 16446 W Kg −1 , respectively.