Preparation of NiAl LDH@Mn3O4@Co-MOF ternary composites using MOFs as a framework for high-performance asymmetric supercapacitors

• Preparation of NiAl LDH@Mn 3 O 4 @Co-MOF on nickel foam using MOFs as framework. • Comparison of electrochemical properties with binary composites. • Discusse the effect of hydrothermal temperature on electrochemical properties. • NiAl LDH@Mn 3 O 4 @Co-MOF has good electrochemical properties. • NiAl LDH@Mn 3 O 4 @Co-MOF//AC shows 60.91 Wh Kg −1 at 849.91 W Kg −1 . In this work, we have successfully synthesized NiAl LDH@Mn 3 O 4 @Co-MOF ternary composites with good properties. Co-MOF sheets are first grown on NF (nickel foam) by the aqueous solvent method. Then Mn 3 O 4 particles are grown on Co-MOF sheets by electrodeposition. Finally, ultrathin NiAl LDH nanosheet clusters were grown on Co-MOF sheets by hydrothermal method. The three-dimensional Co-MOF can offer a larger specific surface area and more active sites, and the combination of the three substances generates a synergistic effect, resulting in a ternary composite with superior performance, which has superior specific capacity characteristics of 1311 C g −1 at 1 A g −1 and can retain 74.6% of the original capacity after 5000 cycles. The asymmetric supercapacitor assembled with active carbon has a high energy density of 60.91 Wh kg −1 at a power density of 849.91 W kg −1 and retains 82.9% of the original performance after 5000 cycles. Therefore, the NiAl LDH@Mn 3 O 4 @Co-MOF can be applied as the positive material for supercapacitor, which has good research and application value.