Fabrication of binary metal-organic frameworks of Ni-Mn@ZIFs(Co·ZnO) decorated on CF/CuO nanowire for high-performance electrochemical pseudocapacitors.

Herein, metal-organic frameworks (MOFs) derived nanoflower-like based binary transition metal (Ni-Mn) are successfully fabricated by a simple synthesis method. The fabricated nanoflower-like structure displays a unique nanoflower-like architecture and internal porous channels constructed by MOF coated on CuO/CF/ZIFs (Co·ZnO) substrate, which is beneficial for the penetration of electrolyte and electron/ion transportation. The as-prepared CF/CuO/ZIFs (Co·ZnO)@BMOF(Ni-Mn) electrode materials present significant synergy among transition metal ions, contributing to enhanced electrochemical performances. The as-prepared CF/CuO/ZIFs (Co·ZnO)@BMOF(Ni-Mn) hybrid nanoflower-like display a high specific capacity of 1249.99 C g at 1 A g and the specific capacitance retention is about 91.74% after 5000 cycles. In addition, the as-assembled CF/CuO/ZIFs (Co·ZnO)@BMOF(Ni-Mn)//AC asymmetric supercapacitor (ASC) device exhibited a maximum energy density of 21.77 Wh·kg at a power density of 799 W kg, and the capacity retention rate after 5000 charge and discharge cycles was 88.52%.