Recently, the advanced nanomaterials have obtained the attention of researchers owing to their unique properties and significant applications in the development of technologies such as engineering, solar cell, battery, fuel cell, hydrogen storage, renewable energies, and other related technologies that have the potential to save the environment. This book focuses on the recent advances related to preparation methods, practical applications, frequency regulation, application of artificial intelligence in energy management, and efficiency. Different approaches of preparing some remarkable families of nanomaterials for renewable and clean energy systems, such as advanced nanomaterials for solar cells, mixed metal oxide-based nanomaterials for hydrogen storage, graphitic carbon nitride/graphene-based nanomaterials for hydrogen storage, and active nanomaterials for Li-ion batteries are presented along with their advantages and disadvantages as well as their applications in various fields in the form of separate chapters for preparation methods and also different energy management methods, by emphasis on artificial intelligence.