عليرضا غلامي پشتهاني

Borophene is a new two-dimensional (2D) material with high potential for various energy storage applications. Borophene's unique properties have attracted the attention of many researchers in the field of energy storage. Due to structural similarities of Borophene and Graphene, hydrogen storage is one of the possible applications of Borophene. This research examines the synthesis of multi-layered Borophene through solvothermal assisted liquid phase exfoliation (SA-LPE) method and reports the effect of acetone, ethylene glycol and dimethylformamide solvents on the final product in two solvothermal times of 24 and 48 hours. To prove the the success of synthesis, various characterization techniques have been used. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) confirmed the formation of multilayer Borophene. Also, field emission scanning electron microscope (FE-SEM) was used to examine the morphology of synthesized nanosheets and high resolution transmission electron microscope (HRTEM) was used for crystal studies of the samples. With the increase of solvothermal time, better seen two-dimensional structures were formed. The hydrogen storage capacity of the synthesized samples was eva‎luated using the three-electrode electrochemical method in 3 M potassium hydroxide (KOH) solution and in a negative potential range. Cyclic voltammetry (CV) in the potential range of -1.2 to 0 V, galvanostatic charge and discharge (GCD) in the potential range of -1 to 0 V and electrochemical impedance spectroscopy (EIS) were used to investigate different electrochemical states of multilayer Borophene. The highest hydrogen storage capacity is related to the sample synthesized with ethylene glycol solvent at 48 hours of solvothermal time. The amount of hydrogen storage of this sample at a current density of 1 Ag-1 is equal to 3.53 mAhg-1. The results of electrochemical impedance spectroscopy showed that the reaction tendency of the samples depends on the type of solvent used, while the resistance of the electrolyte in the samples is related to the time of the solvothermal process.

بور , بوروفن , مواد دوبعدي , ذخيره سازي الكتروشيميايي هيدروژن , لايه برداري فاز مايع

Boron , Borophene , 2D Materials , Electrochemical Hydrogen Storage , Liquid Phase Exfoliation

Alireza Gholami Poshtahani

Dr. Hossein Aghajani