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The science and technology of ultracapacitors are reviewed for a number of electrode materials, including carbon, mixed metal oxides, and conducting Polymers .More work has been done using microporous carbons than with the other materials and most of the commercially available devices use carbon electrodes and an organic electrolytes.
This paper reveals the importance and the urgent need for the evolution of ultra capacitors which is expected to bring a revolutionary and remarkable change in the replacement of the traditional batteries. The need for ultracapacitors is lucidly mentioned in this paper. The fundamental phenomena of capacitor charging is mentioned which serves as a foundation in further advancements. The role of Nanotubes in the development of ultra capacitor is dealt. The advantage of Nanotubes over conventional capacitors is explained. The main problem faced is the capacitor current is capacitor current is a function of both voltage change and capacitance change as a function of voltage. So the specifications are to be considered in the ultracapacitor. Using all these method of ultracapping a car is briefly dealt