▎ 摘　　要

Layered Double Hydroxide (LDH) based on Metal Organic Framework (MOF) structures has attracted a great deal of attention due to their high surface area, tailoring structure of the MOF, and high pseudocapacitance of LDH. Herein, an Ni-ZIF-67/Mn-LDH supercapacitor electrode was prepared via the solvothermal method at room temperature. A supercapacitor electrode based on Ni-ZIF-67/GO-LDH by replacing active metal Mn with graphene oxide (GO) was also synthesized to enhance the capacitance retention and stability from 78% to 97% after 1000 cycles. The morphology of these electrodes was characterized by scanning electron microscopy (SEM). It was found that the specific surface areas of Ni-ZIF-67/GO-LDH and Ni-ZIF-67/Mn-LDH are 82 and 20m(2)g(-1). The electrochemical performance of the two nanocomposite supercapacitor electrodes was observed by cyclic voltammetry, charge-discharge, and electrochemical impedance spectroscopy measurements. The Ni-ZIF-67/GO-LDH electrode produced a specific capacitance (Cs) of 1036 F/g at 1A/g, while the Ni-ZIF-67/Mn-LDH electrode results in a superior Cs value of 1420 F/g at 1A g(-1) with an energy density of 44Wh/kg and a power density of 3.5kW/kg.