Stack optimization and testing for its integration in a rSOC-based renewable energy storage system

G. Cubizolles (1) , J. Mougin (1) , S. Di Iorio (1) , P. Hanoux (1) , S. Pylypko (2)

1 Univ. Grenoble Alpes – CEA/LITEN
2 Elcogen

Stacks dedicated to rSOC operation require improvements as compared to stacks dedicated to purely SOEC or SOFC mode. Starting from an electrolysis stack, improvements have been performed in the European project REFLEX, mainly to enhance reactants distribution, reduce pressure drops, integrate new cells specifically developed as part of REFLEX project, and finally integrate larger cells to reduce stack and system cost and footprint. For easier handling, mechanical connection to the system was optimized. Long-term degradation tests were performed both for reference and optimized cells within two 5-cell stacks. A full size 25-cell stack was assembled integrating optimized connections to gases lines, specific stack clamping system and internal electrical insulation required for stack integration into REFLEX modules. For prospective reason enlarged cells were produced and integrated within first a 5-cell stack, and then a 25-cell stack. Finally, stability of performance along pre-serial manufacturing process was checked for 20 stacks before their delivery for integration into REFLEX modules.

Domains: Chemical Sciences

G. Cubizolles, J. Mougin, S. Di Iorio, P. Hanoux, S. Pylypko. Stack optimization and testing for its integration in a rSOC-based renewable energy storage system. ECS Transactions, 2021, 103 (1), pp.351-361. ⟨10.1149/10301.0351ecst⟩. ⟨cea-03629918⟩