Interesting discovery, however the energy density of such a battery would mean it couldn't ever be used to replace current lithium cells due to weight/space constraints. Might have a niche somewhere if gets to commercialisation stage?
Stationary storage doesn't care about weight and doesn't care a whole lot about space, so it sounds like a decent fit. Grid storage is becoming very important and useful as inconsistent renewable power (wind and solar) becomes cheaper and more common.