Abstract

Storage and conversion technologies are being developed in response to the extreme need to find renewable energy alternatives and reduce reliance on fossil fuels. This problem is being driven by the accelerated growth of the world economy, a high level of fossil fuel consumption, and rising serious environmental pollution. A lot of people are interested in supercapacitors due to their unique physical and chemical properties like eco-friendly nature, long life and high energy. It acts as a bridge between conventional capacitors, which have high power, and fuel cells/batteries, bridging the energy-power gap (having high energy storage). It is evident that there are various research initiatives to address this, and supercapacitor basic and practical research has moved quickly. Here is a quick description of nickel hydroxide (Ni(OH)₂) based materials used to create supercapacitors, including its technology and workings. The present review article highlights the importance of Ni(OH)₂ as an important source of material for the development of supercapcitor for energy storage purposes. Ni(OH)₂ has been synthesised using a variety of processes, which have all been thoroughly studied. Also discussed in detail are the improvements in Ni(OH)₂ electrochemical performance.

Keywords: Supercapacitors, Ni(OH)₂, fossil fuel, energy storage applications, batteries, carbon nanosheets.