Supercapacitors are gaining prominence as energy storage devices due to their advantages such as fast charging and discharging, so there is an urgent need to develop higher performance devices. The electrode materials play a decisive role in the performance of supercapacitors. In this study, spinel CuNi 2 S 4 were synthesized by CuNi layered double hydroxides from Cu Metal-Organic Frameworks, which has a high specific capacitance of 7.1 F cm −2 (2784.3 F g −1 ). The capacitance retention rate of 79 % was retained after 5000 long cycles. A hyb...
