"If the world is going to get off of fossil fuels, we’re going to need batteries—big batteries, and lots of them, to smooth out intermittent power sources like wind and solar. But we aren’t doing nearly enough to develop the technologies that will allow us to build the cheap, grid-scale storage we need, according to Don Sadoway of MIT.
"Sadoway is the cofounder of a grid battery startup called Ambri that’s trying to find a solution. Its technology, inspired by aluminum smelters, uses two liquid metals as electrodes and a salt electrolyte to form a battery cell." - MIT Technology Review