Alphabet Inc.’s secretive X skunk works has another idea that could save the world. This one, code named Malta, involves vats of salt and antifreeze.
The research lab, which hatched Google’s driverless car almost a decade ago, is developing a system for storing renewable energy that would otherwise be wasted. It can be located almost anywhere, has the potential to last longer than lithium-ion batteries and compete on price with new hydroelectric plants and other existing clean energy storage methods, according to X executives and researchers.
The previously undisclosed initiative is part of a handful of energy projects at X, which has a mixed record with audacious “moonshots” like Google Glass and drone delivery. Venture capitalists, and increasingly governments, have cut funding and support for technology and businesses built