System for high-temperature reversible electrolysis of water comprising a hydride tank coupled with the electrolyser

System for high-temperature reversible electrolysis of water comprising:

• a device forming a high-temperature reversible electrolyser, configured to operate in a solid-oxide electrolyser mode, for the production of hydrogen and thus the storage of electricity, and/or according to a solid-oxide fuel cell mode, for the consumption of hydrogen and thus the withdrawal of electricity, said reversible electrolyser being configured to operate under a pressure of between 2 and 15 bars,
• a hydride tank, thermally coupled with said reversible electrolyser, configured to store hydrogen in the form of hydrides in solid-oxide electrolyser mode of said reversible electrolyser and/or to release hydrogen in solid-oxide fuel cell mode of said reversible electrolyser,
• the system being configured to allow, when the reversible electrolyser is configured to operate in a solid-oxide electrolyser mode, a recovery of the heat released by the hydride tank during the absorption of hydrogen in order to produce pressurized steam intended to enter the reversible electrolyser, and to allow, when the reversible electrolyser is configured to operate in a solid-oxide fuel cell mode, a recovery of the heat released by the streams leaving the reversible electrolyser to enable the desorption of hydrogen from the hydride tank.