The world’s largest demonstration plant for a new kind of renewable energy storage is up and running in the west of the China. Called liquid-air energy storage (LAES) the plant uses renewable electricity to compress air to extreme densities until it turns to liquid. It can then be rapidly released to power a turbine and discharge that green energy back into the grid.
it is 600mwh dischargeable storage. it produces power at 60mw rated, 65mw peak. It is 50% efficiency range. At this demo size it is $131/kwh storage cost (including all compression/turbine costs). It could be lower at higher storage size, where storage is half the cost of deploying extra batteries. Sure, this is a poor article on the project.