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

[Display omitted] • Eu-MOF was used as precursor for Eu transition metal to fabricate EuZrSe 3 via wet chemical method. • The EuZrSe 3 displays an excellent specific capacitance of 1543 F g−1 at a current density of 3 A g−1. • The enhanced performance of the fabricated novel electrode is due to its huge electroactive surface area and excellent electrochemical conductivity and good morphology. • The resultant EuZrSe 3 also has 93.58% retention efficiency after 10,000 cycle. 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 EuZrSe 3 via the wet chemical method. The various physical and chemical characteristics such as X-ray diffraction spectroscopy (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 electrochemical 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 electroactive 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. [ABSTRACT FROM AUTHOR]