The subject is the Electrolysis of High Temperature Water Vapor (EVHT or EHT), a very promising technology for the production of high efficiency hydrogen, but whose too high rate of cell degradation delays emergence. The interface between the electrolyte and the oxygen electrode proves to be a weak point in improving performance. In the proposed project the optimization of this interface is envisaged by the addition of a barrier layer of characteristics controlled by a deposition method meeting the industrial requirements: the magnetron plasma sputtering. The mastery of the microstrucuture (low thickness, large developed surface) and the chemical composition (gradual variation) of the interface will improve the mechanical characteristics and prevent any parasitic reaction between electrolyte and electrode. The goal is to reach a degradation rate of the electrochemical cell <1% / 1000h, compatible with an industrial deployment. The influence of the pressure on the electrochemical performance of these layers and on the associated aging will also be studied up to 30 bar, the pressure range targeted by these electrolyser technologies, to eliminate the first compression stage of H2 before storage, very energy-intensive.

Project benefits

Publication scientifique : 1

Nouveau projet : 3

Suivi de projet - Pendant le projet : 3

Suivi de projet - Fin du projet : 3

Rapport final : 3

Emplois crées : 3

Brevet : 3

Publication scientifique : 17

People involved in the project

Project leader

Member partner

Information of the project

Start of the project on20 / 06 / 2024 | End of project on20 / 06 / 2024

Strategic business lines

Smart grids

Smart grids

Referent of the project

Stéphane OURY
Chargé de projets

06 80 33 73 61

Pays de la loire

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