Hydogen storage
https://www.kurzweilai.net/nanoscale-graphene-origami-cages-set-world-record-for-densest-hydrogen-storage?utm_source=KurzweilAI+Daily+Newsletter&utm_campaign=cba1872a95-UA-946742-1&utm_medium=email&utm_term=0_6de721fb33-cba1872a95-281908701