Agora recently had a publication about hydrogen where they also discussed the topic of storage: https://static.agora-energiewende.de/fileadmin/Projekte/2021/202

Agora recently had a publication about hydrogen where they also discussed the topic of storage: https://static.agora-energiewende.de/fileadmin/Projekte/2021/2021_11_H2_Insights/A-EW_245_H2_Insights_WEB_V2.pdf https://static.agora-energiewende.de/fileadmin/Projekte/2021... According to them there's enough potential for geological storage, it's just that ideally one should start now to build it (or repurpose existing natural gas storage).