Benzene-1,4-dicarboxylic acid-based Ni-MOF for efficient battery-supercapacitor hybrids: Electrochemical behavior and mechanistic insights

Abstract

Hybrid supercapacitors, integrating both Faradaic and non-Faradaic mechanisms, have emerged as promising energy storage devices due to their high energy density and excellent cycling stability. In the pursuit of sustainable energy storage solutions, the development of advanced materials has garnered significant attention. Herein, we report the Benzene-1,4-dicarboxylic acid-based nickel metal-organic framework (Ni MOF) for application in battery supercapacitor hybrid configuration. The Ni MOF was synthesized via a simple and scalable hydrothermal method, resulting in a mixed nanorods structure. The electrochemical setup of bare electrode uncovers its marvelous electrochemical profits with specific capacity of 678.23C/g (3 mV/s) and 565.32C/g (1.2 A/g). A predominant diffusive nature of Ni-MOF (92.76 % at 3 mV/s) was revealed via simulation approach that back these profits. Furthermore, the asymmetric supercapacitor assembled with the Ni MOF along activated carbon exhibited high specific capacity (197.20C/g), along with outstanding specific energy and power (46.56 Wh/kg 850 W/kg respectively). Besides, persuasive rate capability (43.19 % conservation of specific energy while boosting the specific power to 10 times) along with splined cyclic life was observed. The findings unveil Ni-MOF as an excellently tailored and eco-conscious choice for electrode materials in advanced energy storage devices, driving advancements in sustainable energy technologies.