The project will also aim at studying the transferability of the AGRAL cermet to the hydrogen and fuel cell application. Indeed its properties are interesting to increase the durability of the solid oxide fuel cells and electrolysis cells (SOFC/SOEC). For SOEC, the core of the technology is the stack of the electrolysis cells separated by interconnect plates which should present very high properties against corrosion.
The project will also aim at transferring the AGRAL cermet material to hydrogen and fuel cells application and particularly for hydrogen production by High Temperature Electrolysis (HTE) working at 700-900°C. Hydrogen production by HTE of steam stands as a sustainable solution, provided it is driven by carbon-free energy. HTE is a highly promising hydrogen production process which could meet a rising demand for hydrogen.
A HTE electrolyser is composed of a stack of several single repeat units (SRU). The electrochemical cell comprises of three ceramic layers: anode, electrolyte and cathode, the interconnect plates separate the different SRUs.
Schematic of a single repeat unit in a planar-technology HTE electrolyzer, showing details of the electrochemical reactions involved. In blue, the interconnect plates, followed by the tree ceramic layers, host to the chemical reaction (yellow, green, pink).
For this application, the objective is to develop a technology that enables to obtain the AGRAL cermet coating so that it could be deposited on the interconnect plate in order to ensure a durability of 40 000h.