A high valence binary metal–organic framework as an electrode material for aqueous asymmetric supercapacitors

Abstract

This study presents the chemical transformation of nickel-based metal–organic frameworks into binary metal–organic frameworks by introducing cobalt metal ions. The resulting NiCo-BDC hierarchical nanostructure exhibited higher oxidation states, resulting in an impressive capacitance of 1431 F g⁻¹. Additionally, the device based on this material exhibited exceptional capacity retention over 3000 cycles.