Timeline for Capacitance when one plate has more surface area
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Sep 11, 2016 at 1:30 | comment | added | Whit3rd | The other element in a supercapacitor is the electrolyte; that is how the charge gets close to the sintered graphite. That electrolyte chemically reacts somehow in order to coat the exposed surfaces of the graphite with an insulating layer. For good connection to the electrolyte, a paper or perforated plastic film holds the graphite grains away from the metal (or second graphite) electrode. | |
| Sep 10, 2016 at 19:41 | comment | added | user273872 | I just updated the picture to get rid of that gap.. | |
| Sep 10, 2016 at 19:36 | comment | added | user273872 | I didn't specify what kind of capacitor I was talking about, but I had just recently been reading about electrochemical capacitors. Specifically I read this: "Early electrochemical capacitors used two aluminum foils covered with activated carbon" from here: en.wikipedia.org/wiki/Supercapacitor#History which doesn't seem to jive with some of the things in your answer. I'm sure you want the carbon to be conductive because it acts to increase the surface area of the metal conductor. Perhaps my picture above is misleading there's a gap between the carbon and the metal (they're in contact). | |
| Sep 9, 2016 at 0:33 | history | answered | Whit3rd | CC BY-SA 3.0 |