Dielectric Properties of Nanolayers For Next-Generation Supercapacitor Devices

Abstract

Recently, two-dimensional (2D) nanolayers (2D-NLs) have been in demand for their excellent optical, thermal, chemical, electronic and mechanical properties due to their high electron mobility, quantum hall effects, high surface area, tunable functional surface and wide band gap with high thermal and chemical inertness. Due to these extraordinary properties, 2D-NLs can be applied in several applications, including batteries, fuel cells, sensors, environmental remediation and biomedical. Some 2D-NLs such as graphene, metal-oxide and hydroxide materials are in demand for supercapacitor application as they can store charge by both means, viz EDLC and pseudocapacitance. Despite this, 2D-NLs deal with high dielectric constant to achieve fast electron mobility in solution, which directly impact their charge transfer and storage performance. Additionally, their electronic scale manipulation significantly impacts the band gap value, attaining the optimum quantum parameters for different applications. In this chapter, we highlight the strategies adopted to tune the electronic level of 2D-NLs to alter charge mobility. © 2023 River Publishers. All rights reserved.