China already has GWH scale sodium battery plants. So if THEY have been trying to suppress it THEY aren't doing very well. This announcement is about an improv

China already has GWH scale sodium battery plants. So if THEY have been trying to suppress it THEY aren't doing very well. This announcement is about an improvement in energy density made possible by $Bs being invested to allow sodium batteries to become more competitive with lithium. There are also other battery chemistries being rolled out. Iron based ones seem particularly promising for stationary storage.