They're not?
While batteries store energy in a chemical reaction and capacitors store it in an electric field; physically their construction is very similar.
Super capacitors, like batteries, have plates and use an electrolyte. They are also packaged similarly.
https://duckduckgo.com/?q=industrial+capacitor&t=fpas&iax=im...
I would imagine there is quite a bit of overlap in manufacturing and chemistry.
They're not?
While batteries store energy in a chemical reaction and capacitors store it in an electric field; physically their construction is very similar.
Super capacitors, like batteries, have plates and use an electrolyte. They are also packaged similarly.
https://duckduckgo.com/?q=industrial+capacitor&t=fpas&iax=im...
I would imagine there is quite a bit of overlap in manufacturing and chemistry.