Far better would be to add 10% battery capacity, which would have the same net effect for cheaper.
If you're not going to be using the high power of a supercapacitor, there's zero reason to pay a premium.
If you're not going to be using the high power of a supercapacitor, there's zero reason to pay a premium.
The idea here is to leverage their incredibly fast rate of charge and short term nature to reduce time spent Supercharging. Very roughly speaking, you can charge from 0-90% in an hour, but to go from 90-100% can take almost another hour.
If you could get the car to 90% and then very rapidly charge the capacitors with the remaining 10% that trickles in, you get the car off the charger faster. In theory you could almost double the number of cars you could serve at that station.