Due to their exceptional qualities and the fact that they include a diverse range of particles with a least one dimension ranging from 1 nm to 100 nm, nanomaterials have drawn a lot of interest as a remarkable class of materials. Extremely high surface areas may be achieved by the purposeful creation of nanoparticles. Nanomaterials have become a crucial topic of study in the realm of affordable electrochemical devices for energy storage and conversion applications. Numerous studies have been conducted in an effort to increase the efficiency and efficacy of electrochemical devices, such as batteries, supercapacitors, and fuel cells, as a result of their extraordinary physical and chemical features. The desire for increased productivity, connection, and sustainability at a lower cost is what propels the ongoing research and improvement of these high-performance materials. The use of nanotechnology in cutting-edge electronic gadgets is covered. The chapter places a strong emphasis on the various synthesis techniques for new nanomaterials that have uses in electrical gadgets. Additionally, it examines the difficulties faced by companies based on nanotechnology as well as the integration of nanostructures with electrical systems in current and upcoming economically relevant applications. The chapter also examines the relationship between nanomaterials and electronics, which is crucial to the development of future household appliances. Overall, this chapter gives a thorough review of the role that nanomaterials play in the creation of affordable electrical devices. It serves as a helpful resource for academics and engineers interested in the most recent developments in nanomaterials for contemporary electrical devices and emphasizes the necessity for more study in this quickly expanding subject.