Systematic Investigation on the Electrochemical Performance of Pristine Silver Metal–Organic Framework as the Efficient Electrode Material for Supercapacitor Application

Abstract

The pristine silver metal–organic framework (Ag-MOF) is successfully synthesized by the one-pot synthesis method. It serves as the effective electrode material for supercapacitor application because of its excellent conductive frame network and electrochemical activities. The crystal structure, surface morphology, porosity, and chemical configuration of the Ag-MOF are studied and analyzed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) theory, and X-ray photoelectron spectroscopy (XPS) analysis. The electrochemical behavior of the electrode material is determined using galvanostatic charge/discharge (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The aggregated platelike morphology of Ag-MOF provides more electrochemical active sites and shortens the pathway for ion intercalation/deintercalation which results in outstanding electrochemical performance. The maximum specific capacity of 606.2 C g–1 is achieved at a current density of 1 A g–1 in the three-electrode system. The asymmetric supercapacitor device delivers the maximum energy density of 48.69 W h kg–1 at a power density of 608.73 W kg–1. Furthermore, the fabricated device retains an attractive cyclic stability of 131.14% for 5000 cycles at a current density of 5 A g–1 claimed as the novel electrode material in the area of energy storage.

Coordination Confined Silver‐Organic Framework for High Performance Electrochemical Deionization

“…In the FTIR spectra, several intense absorption bands at 3497, 1680, 1574, 1348, 823, and 757 cm −1 , corresponding to the bending vibration of the ─NH 2 group, ─COOH, C═O group stretching vibration, and Ag─O vibration, respectively. [ 57 ] After heat treatment, functional groups disappear due to the decomposition of organic ligands. The porosity of the as‐prepared materials was investigated by N 2 adsorption–desorption, and the relevant results are shown in Figure 2c , Figure S6 , and Table S1 (Supporting Information).…”

“…[ 54 , 55 , 56 ] Constructing Ag‐based MOFs with Ag─O ligand bonds provides a solution to address the significant volume changes in Ag electrodes. [ 57 , 58 ] The coordination interactions allow homogeneous anchoring of Ag to the organic substrate at the atomic level, preventing the growth and aggregation of particles. [ 59 , 60 ] To our knowledge, the deliberate design and construction of Ag‐based MOFs through MOF chemistry to tune electrode stability has not been reported previously.…”

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 104 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.…”

An electrochemiluminescence aptasensor based on highly luminescent silver-based MOF and biotin–streptavidin system for mercury ion detection

“…The broad vibrational band located at 3463 cm −1 indicated the presence of water. 39 The successful preparation of Au NPs was demonstrated by transmission electron microscopy (TEM) and UV-Vis spectrophotometry. It could be seen from the TEM image that the prepared Au NPs had regular morphology and uniform size (Fig.…”