hard to take a statement about overcoming bariers, when the actual publication is paywalled, the abstracts are posy only mixed with nosebleed level chemistry, and basics like watts/kg storage and expected life cycle are not included. Oh and exactly where the mythical hydrogen generation, transportation and storage infrastructure is going to come from. Meanwhile sodium batteries are quietly bieng introduced, at scale.

edit: article apears to describe a way to provide local level "tankage" rather than bulk storage

down vote protest Re-edit: just be clear, hydrogen is non viable as a primary energy source due to it's essential properties https://en.wikipedia.org/wiki/Hydrogen , gargantuan ifrastructure lag, and other more implimentable alternatives that are way ahead, and deserves it's place along side "self driving" as the winner of the always almost wouldn't it be nice prise for fantasy technological non developement.