Influential factors modulating the dielectric behaviour of transition metal oxide nanocomposites for energy storage applications: A-state-of-the-art review

Transition metal oxide (TMO) nanoparticles are recently proven to be the most valuable and promising material for dielectric and energy storage applications. In this work, the peer analysis of different synthesis techniques, factors affecting the dielectric properties and applications of TMO nanocomposites are discussed. The TMO-based nanocomposites include 3d, 4d and 5d series transition metal. TMOs act as one of the primary precursors for the development of composite diectric material with nano dimensions. This review critically analyzed the multi-dimensional aspect of dielectric and energy storage applications with excellent dielectric behaviour of TMO nanocomposites. The highest real permittivity of these nanocomposites is found to be 10(7) with a maximum loss of 10 at 1 kHz frequency and storage efficiency up to >80 %. The incorporation of all crucial challenges and factors including doping concentration, synthesis technique, temperature-frequency dependency, crystallinity, morphology, chemical and structural properties which affect enormously the dielectric properties including the real-imaginary permittivity, energy storage density (Ue), energy storage efficiency (eta), breakdown strength, and sigma ac conductivity values of 3d, 4d and 5d TMO nanocomposites are mentioned in this review. This detailed discussion gives an ultimate idea of the latest development, parameters and future applications in research on TMO nanocomposites for their enhanced performance in multi-dielectric and energy storage applications.

Automated summary

This article reviews the importance of transition metal oxide (TMO) nanocomposites in dielectric and energy storage applications, and discusses the peer analysis of different synthesis techniques and factors affecting their dielectric properties. The review provides a comprehensive understanding of the multi-dimensional aspects of TMO nanocomposites and their promising performance in various applications.