Abstract
There is a great deal of interest in other 2D compounds due to the development and practicality of graphene in many fields. Due to its similar properties to graphene, the boron nitride (BN) nanosheet has become one of the most thoroughly studied and investigated nanomaterials in this area. The next wave of electrical and optoelectronic products can incorporate 2D-hBN and other 2D materials like graphene. In this chapter, our main aim is to summarize the 2D h-BN nanosheets and their synthesis process via two different mechanisms, i.e., exfoliation techniques and the Chemical Vapour Deposition (CVD) process. The chapter also provides insights into the 2D h-BN's energy-associated properties and their applications in fabricating various energy storage devices, including batteries, supercapacitors, and solar and fuel cells.