D5.2 - Optimised large-area MEAs supply for stack testing

This report summarises the work that has resulted in the selection of the final AnIone MEA design, a decision based on a single cell screening study performed by CNR-ITAE on 5 and 100 cm2 cells. The final AnIone MEA consist of a NiFe-oxide anode on densified Ni-felt; a commercial available membrane (FAA3-50), and a NiMo cathode on carbon GDL. The information and results of the screening study have been transferred to IRD to scale-up the selected formulations for the full-size MEA manufacture. The scale-up challenges that have occurred and been overcome is also discussed. The scaled-up MEA performs as expected from the screening study. IRD is completing the manufacturing of 25 full size MEAs for the Hydrogenics full size AnIone stack. 25 MEAs are sufficient for additional small stack test and leaving a few MEAs for replacement if needed. Three (3) full-size MEAs have manufactured by IRD and provided already to the partners; One (1) MEA wasshipped to CNR-ITAE for electrochemical check, and two (2) MEAs were sent to Hydrogenics for the initial stack assembly trials. The latter has resulted in a small size adjustment of the MEA, but nothing that has significantly changed the manufacture. CNR-ITAE tested stamped out MEAs with a very encouraging result for both performance and durability. These test results made base for the decision of completing all 25 full size AnIone MEAs. All 25 MEAs are expected to be delivered to Hydrogenics in November 2022