"From liquid air to supercapacitors, energy storage is finally poised for a breakthrough"

"Big batteries, whose costs are plunging, are leading the way. But a host of other technologies, from existing schemes like splitting water to create hydrogen, compressing air in underground caverns, flywheels and heated gravel pits, to longer term bets like supercapacitors and superconducting magnets, are also jostling for position."

Reported on theguardian.com

Full article here.