The charge of the ultra-capacitors

Ultracapacitors have been around for some time but has not really been used to power devices and more challenging, cars. Nevertheless, they hold lots of potential. For one, ultracapacitors releases a burst of energy and also capture energy, which make it more lasting than batteries. They are more effective at rapid, regenerative energy storage than chemical batteries. Ultracapacitors can also be used to power cars but in an advanced form. For instance, they could help level the load on the car's battery by powering acceleration and recovering energy during braking. They can also operate at very low temperatures, where electric car batteries mostly face their fate. Ultracapacitors can be made of carbon nanotubes since those nanotubes hold the promise of even higher porosity than the activated carbon used in commercial ultracapacitors. Together the nanotubes have a large surface area and their dimensions are more uniform than those of the activated-carbon pores. Billions of nanotubes can theoretically make an ultracapacitor that could store 25-50% of the energy in a chemical battery of equivalent weight.