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by fsh 1564 days ago
I don't think that leakage is a serious issue in high-pressure hydrogen storage. The tanks used in hydrogen fuel cell vehicles have leakage rates of a few mL/minute [1]. The first generation Toyota Mirai has a storage capacity of 85000 standard liters of hydrogen. It would take tens of years to leak out a significant fraction of that.

[1] https://link.springer.com/article/10.1007/s42154-020-00096-z