I read in a textbook about electrolytic caps the following:
The foils are separated by paper saturated with an electrolyte for current conduction — thus the name electrolytic capacitors
I'm confused. I thought there's no current conduction inside a cap but only electric field between the foils which are layered by aluminum-oxide. I thought electrolyte soaked paper is used for to heal the foils.
Is this argument from the text correct?
Edit: If cap dielectric should be an insulator why it is conductive Im completely confused.