Comparative Study of Supercapacitor, Battery and Supercapattery

Abstract

Nowadays, the consumption of fossil fuels is increasing, which means there may be some serious environmental problems caused by greenhouse emissions. Solar and wind electricity, for instance, are examples of renewable energy sources that are important for the growth of human society. However, due to their unpredictability, these energy sources are susceptible to the effects of the environment, including the weather. In order to continue using renewable energy sources, energy storage technology development will be crucial. These devices would be able to store energy under favorable external conditions and release it when the environment was not ideal for converting the renewable energy to electrical energy. There have been two main types of energy storage devices, which are respectively supercapacitor and battery. Supercapacitor has an outstanding energy density with a long-life cycle while there are still some challenges with the power density. Battery has an impressive power density while there are still some problems with the energy density. Therefore, a new type of energy storage device is highly required. So, more attention has been devoted to supercapattery, which could have both high power and energy density. This essay will introduce the working principle of supercapacitor, battery with more details. Next, there will be a comparison between supercapacitor and battery. Finally, supercapattery will be proposed, and there will be a simple introduction of Lithium-ion hybrid capacitor based on silicon carbon material.