Investigation of hybrid nanostructure based on nanorods vanadium pentoxide/mesoporous silicon as electrode materials for electrochemical supercapacitor

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2022-08, Vol.128 (8), Article 653
• Main Authors: Berouaken, Malika, Yaddaden, Chafiaa, Ferdjouni, Habiba, Torki, Chaima, Maoudj, Mohamed, Chebout, Katia, Ayat, Maha, Menari, Hamid, Manseri, Amar, Gabouze, Noureddine
• Format: Article
• Language: English
• Subjects: Applied physics; Aqueous electrolytes; Characterization and Evaluation of Materials; Condensed Matter Physics; Contact angle; Current density; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrode materials; Electrodes; Fourier transforms; Infrared spectroscopy; Machines; Manufacturing; Materials science; Nanorods; Nanostructure; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Scanning electron microscopy; Silicon; Spectrum analysis; Supercapacitors; Surfaces and Interfaces; Thin Films; Vacuum evaporation; Vanadium pentoxide; Wettability
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-05804-6

Here, the development and characterization of mesoporous silicon nanostructure (mPSi) coated with nanorods vanadium pentoxide ( NV 2 O 5 ) thin layer for their uses as electrode materials for electrochemical supercapacitor (SC) were investigated. The mPSi was prepared by electrochemical anodization at a constant current density and characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). Whereas, NV 2 O 5 thin layer was deposited into mPSi employing Joule effect vacuum evaporation technique. NV 2 O 5 /mPSi structure was subjected to rapid thermal annealing (RTA) under oxygen atmosphere. The physico-chemical proprieties, morphology, structural, surface area and wettability of this structure were analyzed by FTIR, SEM, XRD, BET and contact angle measurement, respectively. A promising structure for electrochemical supercapacitor application with good characteristics, such as porous surface and hydrophilic nature, was obtained. Furthermore, the electrochemical properties were examined in aqueous electrolyte 1 M Na 2 SO 4 by means cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). As a result, the NV 2 O 5 /mPSi electrode displayed a specific capacitance of 2.7 mF/g at a current density 0.04 mA/g and a superior cycling stability upon 12,000 cycles at a current density of a 0.5 mA/g with 82% capacity retention.