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Daniel Bélanger - A 25-year journey from Los Alamos to the east along the Saint-Laurent and Loire rivers, to investigate electrode materials and aqueous electrolytes for electrochemical capacitors

  • Date de parution : 16/10/2019
  • Durée : 48 min
  • Crédits :

Résumé de la vidéo

Electrochemical capacitors have attracted a lot of interest in the past 25 years. The research performed has included various aspects that are not only limited to the development of new materials but that also involved fundamental studies to get a better understanding of charge storage processes in, most often, porous materials.

Elżbieta Frąckowiak - Electrolytes in electrochemical capacitors: beyond capacitive storage

  • Date de parution : 16/10/2019
  • Durée : 53 min
  • Crédits :

Résumé de la vidéo

Electrochemical capacitors (EC) are the devices based on the reversible storage of energy by electrostatic (capacitive) attraction of ions. Performance of EC are strongly governed by the type of electrolytes, namely aqueous, organic and ionic liquids. As a consequence, practical voltage range of EC in these electrolytes varies from 0.8 V to 3.5 V, respectively. Capacitive charge storage can be increased by faradaic reactions, frequently called pseudocapaci...

Yury Gogotsi - High-power, high-energy storage enabled by 2D metallic materials

  • Date de parution : 16/10/2019
  • Durée : 49 min
  • Crédits :

Résumé de la vidéo

Electronic conductivity is a key factor in achieving fast charging and high-power performance of electrical energy storage devices. The ‘beyond graphene’ march led to the discovery of new types of conductive 2D materials, like MXenes, produced by wet chemical or electrochemical extraction of interleaved ‘A’ atomic layers from the layered ternary carbide or nitride precursors.

Volker Presser - A tale of two technologies: capacitive deionization and supercapacitors

  • Date de parution : 16/10/2019
  • Durée : 48 min
  • Crédits :

Résumé de la vidéo

The interfacial process of reversible ion electrosorption at the interface of a liquid electrolyte and a solid electrode enables not only fast energy storage via electrical double-layer capacitors but also effective water desalination via capacitive deionization (CDI). Both technologies share similarities, such as the usefulness of highly nanoporous carbon as the electrode material, careful design of surface functional groups, and the importance of adequat...

Andrea Balducci - Going toward high energy electrochemical capacitor: the essential role of the electrolyte

  • Date de parution : 30/09/2019
  • Durée : 49 min
  • Crédits :

Résumé de la vidéo

Several studies indicate that if the energy of EDLCs could be increased from the actual values to 15-20 Wh/kg, the number of applications in which these devices could be introduced would heavily be higher. The most convenient way to increase the energy of EDLCs is to increase their operative voltage, which is directly related to the stability (chemical and electrochemical) of the electrolyte. In this lecture the alternative electrolytes proposed in past ye...

Patrice Simon - 3- and 2-Dimensional materials for capacitive energy storage

  • Date de parution : 30/09/2019
  • Durée : 45 min
  • Crédits :

Résumé de la vidéo

This presentation will give an overview of the research work we achieved on capacitive and pseudocapacitive materials and the challenges/limitations associated with the development of these materials. We will present first the state-of-the art of the fundamental of ion adsorption mechanism in porous carbons and its practical applications before moving to solid-state supercapacitor electrodes and devices. A second part of the talk will be dedicated to pseud...

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