That table gives a value of 9 Wh/kg for electrochemical supercapacitors. I've seen a lot of researchers claim values over 30 Wh/kg in research papers over the p

That table gives a value of 9 Wh/kg for electrochemical supercapacitors. I've seen a lot of researchers claim values over 30 Wh/kg in research papers over the past few years. That's still not adequate for mobile applications that currently use lithium ion batteries, but what we're wondering is why supercapacitors aren't being used for stationary applications where cycle life is more important than density. It could just be, as I speculated before, that these improved supercapacitor designs take a long time to move from lab to factory.