RuO2 MoO3 Composite Thin Films for Supercapacitor

Abstract

The growing demand of energy sources in recent few years has become the concern topic for researchers due to the lack of renewable energy sources. The use of fossil fuels for energy production is also a burning issue regarding the worldand#8223;s ecology and economical concern. Global warming, fuel dependency and pollution are few examples to divert from fuel-based economy to electricity-based civilization. Some conventional sources of energy are solar energy, wind energy etc. but this energy production is highly depending on natural phenomena and we do not have control over these phenomenaand#8223;s. Therefore, there is immense need to develop energy storage devices to store the generated energy for future use. In this aspect, the electrochemical power sources are emerged as the new sources for store and production of electrical energy. The electrochemical power sources are more efficient than the fuel-based system, because they provide clean energy, which is necessary demand according to environmental issues. Electrical energy storage is required in many applications such as telecommunication devices, cell phones, standby power systems and electric hybrid vehicles [1]. Many applications are demanding local storage or local generation of electrical energy. Therefore, there is a strong need of development of improved methods for storing energy when it is available and retrieving when it is needed. The electrochemical power sources include batteries, fuel cells and supercapacitors. The electrical energy storage in these sources is according to fundamentally in two different ways [2], Indirectly in batteries, as potentially available chemical energy required Faradic oxidation and reduction of the electroactive reagents to release charges that can perform electrical work when they flow between two electrodes having different electrode potential and, Directly, in an electrostatic way as a negative and positive electric charges on plates of capacitor. newline