Electrochemical performance of asymmetric device using the nickel–zinc organometallic structure

Abstract

Bimetallic metal–organic frameworks (BMOFs) have developed as novel candidates for electrodes due to their high‐performance energy storage applications. We attempted to develop a new three‐dimensional (3D) ordered structure of nickel–zinc MOFs (NZMOF), grown in situ on carbon cloth (NZMOF/CC) using a solvo‐hydrothermal strategy to increase the stored energy. A notable capacitance of 456.8 F/g was achieved for this electrode at 1 A/g. In addition, the NZMOF/CC//AC/CC assembled split‐cell asymmetric supercapacitor device (SASD) achieved an excellent energy and power densities of 38.54 Wh/kg and 750 W/kg, respectively, with a capacity retention of 87.27% after 5000 cycles, which is better than that of conventional supercapacitors. Additionally, this study is easy and controllable, providing a viable approach for fabricating hybrid electrode materials for high‐performance energy storage systems.