Solvent-Assisted Morphology-Induced Nickel Metal–Organic Framework as a Highly Efficient Electrode for Energy Storage Application

Abstract

The rise in need has led to the requirement of advanced smart materials to conquer the present and future disasters in energy storage and generation. Among various materials, metal organic framework (MOF) has been chosen as an active material with tunable structures, porous inorganic− organic structure, and flexibility, which allows it to play a vital role in synthesizing highly efficient energy material. In recent years, MOF materials have voiced remarkable energy storage efficiency and conversion by encouraging most of the challenges that are typically faced by transition metals, metal hydroxides, etc. Among various supercapacitor materials, nickel is a new class of electrode with excellent capacitance. To overcome some limitations, such as cyclic stability and low conductivity, researchers are working on tuning its structure and morphology. In this work, Ni-MOFs are synthesized by varying the solvent ratio using the hydrothermal method. The prepared N-0.5 MOF electrode material delivers a high specific capacity of 1004.67 C g −1 at 1 A g −1 current density. Furthermore, the hybrid supercapacitor device is fabricated using N-0.5 as the anode and activated carbon (AC) as the cathode, and its electrochemical performances are investigated in both the gel and aqueous electrolytes. All the results affirm that the prepared electrode material shows better electrochemical performance and serves as a suitable supercapacitor electrode.

Recent Progress and Perspectives on Metal–Organic Framework-Based Electrode Materials for Metal-Ion Batteries and Supercapacitors

“…Nickel is widely distributed in nature and considered as one of the most abundant elements in the Earth’s crust with lower toxicity; hence, Ni-MOFs are considered environmentally friendly materials with sustainable application. Shalini et al had constructed a series of Ni-MOFs by regulating the solvent ratio using a hydrothermal method wherein the prepared N-0.5 MOF electrode material achieved a remarkable specific capacity of 1004.67 C g –1 at a current density of 1 A g –1 . Moreover, a hybrid supercapacitor device was constructed with N-0.5 as the anode and activated carbon (AC) as the cathode, and it was suggested that the developed electrode exhibited superior electrochemical performance, making it a viable supercapacitor electrode option.…”