I'm talking about fully reversible fuel cells for grid storage, not a hydrogen fuels economy. So this kind of thing - https://www.energy.gov/sites/prod/files/20

I'm talking about fully reversible fuel cells for grid storage, not a hydrogen fuels economy. So this kind of thing - https://www.energy.gov/sites/prod/files/2014/03/f11/rev_fc_wkshp_anderson.pdf https://www.energy.gov/sites/prod/files/2014/03/f11/rev_fc_w...