They are an NCM chemistry like specter said, they used to be made by Energy Innovation Group (korean mfg), but energica got cagey about the actual manufacturer of the new packs. I think maybe Farisis?
"Energica has been using flat lithium pouch cells with the Nickel-Manganese-Cobalt / NMC chemistry. Everyone in the E-motorcycle and electric aircraft industries have stated that solid-state batteries will be a huge improvement, if…they ever start being produced. They work in the lab, but I haven’t found out what the holdup is for production" - electricbike.com