> This isn't new... Well, yeah, this is in the opening of the article: > It updates a long-standing technology that never took off for electrical storage. Th

> This isn't new... Well, yeah, this is in the opening of the article: > It updates a long-standing technology that never took off for electrical storage. There is/was plant operational since 1970s in Germany[1], which looks similar to the Wired article, but different from some other solutions posted in comments. Missing some parts perhaps to be viable. 1. PDF: http://www.fze.uni-saarland.de/AKE_Archiv/AKE2003H/AKE2003H_Vortraege/AKE2003H03c_Crotogino_ea_HuntorfCAES_CompressedAirEnergyStorage.pdf http://www.fze.uni-saarland.de/AKE_Archiv/AKE2003H/AKE2003H_...