4 ms·
(1) Supercapacitors are commercialized, see: http://www.mouser.com/Power/Supercapacitors/_/N-6uivw http://www.mouser.com/Power/Supercapacitors/_/N-6uivw (2) To
by jonmrodriguez 14y ago
(1) Supercapacitors are commercialized, see: http://www.mouser.com/Power/Supercapacitors/_/N-6uivw http://www.mouser.com/Power/Supercapacitors/_/N-6uivw
(2) Today's supercapacitors have very poor energy density even compared to batteries. What they do have is good power density, meaning they can deliver their limited energy very fast.
(3) Boosting the energy density of supercapacitors will happen but requires many years of great strides in nanotech. Research like this, involving 3D nanostructures with enormous surface area: http://phys.org/news/2012-10-sponge-like-graphene-supercapacitor-electrodes.html http://phys.org/news/2012-10-sponge-like-graphene-supercapac...
- tocomment 14y agoHmm, I'm trying to compare these to batteries. Does anyone know how to convert farads to watt hours?
- irrelative 14y agoEnergy stored in a capacitor is equal to: 1/2 * c * v^2 Where c is the capacitance in farads, and v is the voltage. That will produce a value of joules. Note that the capacitor is rated for a given voltage, so that goes in as v. Converting watt hours to joules goes like this: A watt is one joule per second, so a watt hour is 3600 joules.
- tocomment 14y agoBy that formula, I only get ~12 joules for a 1 farad capacitor at 5 volts. That seems low. Are you sure it's correct?