The per-kWh capacity cost at the link for hydrogen is very high compared to others I've seen. I wonder at the assumptions going into it. Are they assuming abo

The per-kWh capacity cost at the link for hydrogen is very high compared to others I've seen. I wonder at the assumptions going into it. Are they assuming above-surface compressed hydrogen tanks, or liquid hydrogen? Ultra cheap thermal storage promises cost at least an order of magnitude below that.