Will Supercapacitors Solve Hybrids' Energy Storage Woes?

A Korean firm wants its supercapacitors to be an integral part of the automotive industry, according to the IEEE Spectrum. Unlike conventional batteries, capacitors can be charged and discharged hundreds of thousands of times, and recharge almost instantly. For now, the price is too high ($9,500/kWh) and energy densities (opposed to power densities) aren't high enough, but the devices are expected to make a splash starting in about two years.