Ni/ZnO nano-sponges have been successfully synthesized through optimized annealing of Ni/Zn-based organic framework(Ni/Zn-MOF).The annealed MOF provides the stable carbon structure with 3D interconnection and prevents structural collapse during the charging and discharging process.The annealing causes the incorporation of intrinsic Ni3+ in the surface of NiO nanoparticles,providing more reaction active sites.The oxygen vacancies in ZnO and heterostructure interfaces between NiO and ZnO promote the charge transformation.Based on the aforementioned advantages,the Ni/ZnO nanocomposites exhibit excellent electrocatalytic performances for supercapacitors.The specific capacitance can reach to 807 F·g-1 at 1 A·g-1 in the studied electrodes.After 5,000 cycles at 10 A·g-1,the cyclic stability remains excellent at 86％ of the initial capacitance.Moreover,the as-prepared asymmetric supercapacitor exhibits a high energy density of 30.6 W·h·kg-1 at power density of 398 W·kg-1.This study is expected to provide new insights into exploring the potential mechanism of catalyst action.