IEMN
  • Home
  • News
    • IEMN Newsletters
    • M2-Ingé Internships
    • Job offers
    • All news
  • The Institute
    • Presentation
    • Organization of the institute
    • The Scientific Department
    • The Technological Department
    • Administrative and financial management
    • Rules of procedure
    • Our commitments
  • The Research
    • Scientific departments
      • Nanostructured Materials and Components
      • Micro / nano optoelectronics
      • Telecommunications Technologies and Intelligent Systems
      • Acoustic
    • Research groups
    • Flagship
  • Scientific Production
    • IEMN publications
    • Scientific production resources
  • The platforms
    • CMNF - Central Platform for Micro Nano Manufacturing
      • Engraving and implantation pole
      • In Line Analysis Unit
      • Soft Lithography and Bio Microfluidics
      • Deposits and epitaxy division
      • Lithography Unit
      • Packaging Division
      • CMNF Staff
    • PCMP - Multi-Physics Characterization Platform
      • Scanning Probe Microscopy Facility
      • Hyperfrequency, Optical and Photonic Characterization (CHOP)
      • Advanced Communications Systems and Prototyping cluster (SigmaCOM)
      • Characterisation, ElectroMagnetic Compatibility and Prototyping Centre (C2EM)
      • PCMP Staff
    • Services offered by our platforms
  • Partnership - Valuation
    • Academic Collaborations
    • ANR Projects
    • Main international collaborations
    • Industrial partnerships
    • The joint IEMN-Industry laboratories
    • Startups
  • Research Training
    • After the thesis
      • Do a post-doc at the IEMN
      • Towards the world of business and industry
      • Become a teacher-researcher
      • Become a Researcher
      • Starting a business at IEMN
      • FOCUS on a SATT engineer from the IEMN
    • A thesis at IEMN
      • Thesis and HDR defenses
      • Thesis topics
      • Financing
      • Doctoral studies
    • Master - Engineer
      • Masters ULille
        • Master Life Sciences and Technologies graduate programme
        • Master Nanosciences and Nanotechnologies - Speciality ETECH
        • Master Networks and Telecommunications
      • UPHF-INSA Masters
        • Master in Embedded Systems and Mobile Communications Engineering
        • Master Cyber Defense and Information Security
        • Master in Materials, Control and Safety
        • Master in Image and Sound Systems Engineering
      • Partner/Tutoring Engineering Schools
      • M2-Ingé Internships
    • The Lille branch of the GIP-CNFM
    • Nano-École Lille
  • Contact Us
    • Location
    • Contact form
    • Annuaire Intranet
  • Our support
  • fr_FR
  • Rechercher
  • Menu Menu
NEWS

Microsupercapacitors to power the Internet of Things

Supercapacitors are a solution of choice for supplying power to connected objects, especially when their electrodes are made of vanadium nitride. However, the origin of the performance of this material remains unknown. Researchers from IEMN, University of Nantes have elucidated the process and discovered a way to use it for micro-supercapacitors (MSC). This work, published in the journal Energy & Environmental Science, paves the way for extremely efficient and robust MSCs.

How vanadium nitride will power the Internet of Things

Microsupercapacitors (MSCs) are accompanying the popularity of connected objects, but their energy storage still needs to be improved in a context of increasing miniaturization. Vanadium nitride, for example, is used for large supercapacitors, but it is incorporated in powder form, a form that is incompatible with miniaturization Researchers at the Institute of Electronics, Microelectronics and Nanotechnology (IEMNCNRS/Université polytechnique Hauts-de-France/Université de Lille/Centrale Lille), of the Institut des matériaux Jean Rouxel (IMNCNRS/University of Nantes) and the Catalysis and Solid Chemistry Unit (UCCSCNRS/University of Artois/University of Lille/Centrale Lille) have elucidated the process of charge storage in vanadium nitride, after having used this material for the first time in MSCs. The team was supported by the Network on Electrochemical Energy Storage (RS2E) and the Renatech network.

The researchers used an industrial process of microelectronics: magnetron sputtering. A metallic vanadium roller is subjected to ionized gases and then condensed on a silicon substrate. The material delivers an electrical storage capacity per unit volume (> 700 F cm-3) four times higher than that of nanoporous carbon electrodes. This MSC retains more than 80% of its initial performance after 50,000 charge and discharge cycles, when most MSCs wear out after 10,000 cycles. Thanks to analyses, conducted in part at the Sun synchrotron, the researchers have shown that this performance is due to the presence of a thin layer of vanadium oxide, which forms naturally when the electrodes are in contact with air. It is this layer that stores the electrical charges, without involving the rest of the material, which thus deteriorates much more slowly.

Study of the charge storage mechanism in vanadium nitride integrated as a micro-supercapacitor electrode (c) IEMN

Reference:

Novel insights into the charge storage mechanism in pseudocapacitive vanadium nitride thick films for high-performance on-chip microsupercapacitors,
K. Robert, D. Stiévenard, D. Deresmes, C. Douard, A. Iadecola, D. Troadec, P. Simon, N. Nuns, M. Marinova, M. Huvé, P. Roussel, T. Brousse and C. Lethien.
Energy & Environmental Science, 2020
DOI: doi.org/10.1039/C9EE03787J

Contact: Christophe LETHIEN
Logo
Cité Scientifique
Avenue Henri Poincaré
CS 60069
59 652 Villeneuve d'Ascq Cedex, France
Tel : 03 20 19 79 79
CNRS Logo University of Lille Logo University Polytech Logo Junia Logo Centrale Lille Logo Renatech Logo RFnet Logo
Site map
Copyright Service ECM et pôle SISR 2024
  • Scientific production
  • Legal information
  • Privacy policy
Faire défiler vers le haut
fr_FR
fr_FR
en_GB
We use cookies to ensure you have the best experience on our website. If you continue to use this site, we will assume that you are happy with it.OKNoPrivacy policy