https://core.ac.uk/download/pdf/19496773.pdf
Well according to this paper lohc still has a better energy density then batterys and we would loose the recharge waits. Also existing infrastructure could be reused and it allows the indefinite storage and transport of renewables, if created at source with no additinal conversion loss.
As far as i know there are several varieties in research - with one condensend form (which isnt liquid- sorry im not really a expert on this) - beeing a factor 10 energy denser.
https://www.sciencedirect.com/science/article/abs/pii/S09268...
I think this one is the paper.. I can not say how serious these technologies are driven. The trad car companies have a lot to loose when the car is reduced to 4 engines and a steering wheel.
I still think lithium ion batterys have some use- as birthing help to alternatives, who would otherwise be stuck in development hell.