Uniformly dispersed flowery EuZrSe3 derived from the europium-based metal-organic framework for energy storage devices

Recently, it has become more popular to use in-situ growth of transition metal chalcogenides for efficacious supercapacitor (SCs) applications. Metal-organic framework (MOF) is considered as a good source of precursor for a transition metal. Herein, Eu-MOF was used as a precursor for Eu transition metal to fabricate EuZrSe3 via the wet chemical method. The various physical and chemical characteristics such as X-ray diffraction spec-troscopy (XRD), surface Scanning electron microscopy (SEM), and Brunner-Emmet Teller were utilized to study the phase orientation, crystallinity, morphology, and textual properties of fabricated material, respectively. All the electrochemical parameters like polarization curve (CV), galvanostatic charge-discharge (GCD) and elec-trochemical impedance spectroscopy (EIS) for estimating various parameters such as specific capacitance (Cs) around 1543 F/g & detected a remarkable energy density of 97 Wh/kg at a current density around 3.0 A/g in 2.0 M alkaline KOH electrolyte. Enhanced performance of the fabricated novel electrode owing to its huge elec-troactive surface area and excellent electrochemical conductivity and good morphology. Despite its greater specific energy (97 Wh/kg) and high-power density (658.8 W/kg), it also has 93.58 % retention efficiency after 10,000 cycles.

Automated summary

In-situ growth of transition metal chalcogenides using metal-organic framework (MOF) as a precursor has gained popularity for supercapacitor applications. In this study, Eu-MOF was utilized to fabricate EuZrSe3 via wet chemical method. The physical and chemical characteristics were analyzed using X-ray diffraction spectroscopy (XRD), surface scanning electron microscopy (SEM), and Brunner-Emmet Teller. Electrochemical evaluation showed specific capacitance (Cs) of around 1543 F/g and an energy density of 97 Wh/kg. The fabricated electrode exhibited enhanced performance with a high retention efficiency of 93.58% after 10,000 cycles.