Facile synthesis of hierarchically self-assembled dandelion-like microstructures of bimetallic-MOF as a novel electrode material for high-rate supercapacitors

•A novel bimetallic metal–organic framework was synthesized for the first time.•A direct green synthesis method was developed for fabrication of bimetallic MOF.•Needle-like Bimetallic Bi,Mo-MOF was deposited onto Ni foam.•A high specific capacity of 476 C g−1 and 95.1% retention were obtained. Metal–organic frameworks (MOFs) have gained immense attention as electrode materials for energy storage applications, because of their large porosity as well as high surface area. In this work, a novel needle-like bimetallic MOF (metal = bismuth and molybdenum; BM-MOF) self-assembled in dandelion structure is successfully prepared through a one-pot cathodic electrodeposition route onto nickel foam and directly used as supercapacitor electrode. The fabricated BM-MOF showed a high specific capacity of 476 C g−1 at 10 A g−1, proper rate capability of 43% (from 10 to 100 A g−1) as well as superior cycling performance of 95.1% capacity retention after 8000 cycles at high discharging load of 10 A g−1. These data verified that the fabricated BM-MOF is suitable candidate for charge storage aims. The simple developed electrochemical method is suggested as green synthesis method for fabrication of various bimetallic metal organic frameworks.