edit I am an idiot, who uploaded the image link as the URL. The original source should now be accessible
RMIT engineers say they’ve tripled the energy density of cheap, rechargeable, recyclable proton flow batteries, which can now challenge commercially available lithium-ion batteries for capacity with a specific energy density of 245 Wh/kg.
Not good enough for the next 10 years.
Energy density and charging speed must, and will, improve by much more.
The good news is that funding is finally being given for it so advancement will happen