Harnessing energy and storing it in devices like accumulators is known as energy storage. The field concerns itself with converting the energy in a form which is economically suitable to store. The methods involved in this area are thermal storage, mechanical storage, nuclear fuel storage, interseasonal thermal storage, etc. For someone with an interest and eye for detail, this book covers the most significant topics in the field of energy storage. It elucidates new techniques and their applications in a multidisciplinary approach. The textbook aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.