Book excerpt: The book Materials for Sustainable Energy Storage Devices at the Nanoscale anticipates covering all electrochemical energy storage devices such as supercapacitors, lithium-ion batteries (LIBs), and fuel cells, transformation and enhancement materials for solar cells, photocatalysis, etc. The focal objective of the book is to deliver stunning and current information to the materials application at nanoscale to researchers and scientists in our contemporary time towardthe enhancement of energy conversion and storage devices. However, the contents of the proposed book, Materials for Sustainable Energy Storage at the Nanoscale, will cover various fundamental principles and wide knowledge of different energy conversion and storage devices with respect to their advancement due to the emergence of nanoscale materials for sustainable storage devices. This book is targeted to be award-winning as well as a reference book for researchers and scientists working on different types of nanoscale materials-based energy storage and conversion devices. Features Comprehensive overview of energy storage devices, an important field of interest for researchers worldwide Explores the importance and growing impact of batteries and supercapacitors Emphasizes the fundamental theories, electrochemical mechanism, and its computational view point and discusses recent developments in electrode designing based on nanomaterials, separators, and fabrication of advanced devices and their performances Fabian I. Ezema is a professor at the University of Nigeria, Nsukka. He earned a PhD in Physics and Astronomy from the University of Nigeria, Nsukka. His research focused on several areas of Materials Science, from synthesis and characterizations of particles and thin-film materials through chemical routes with emphasis on energy applications. For the last 15 years, he has been working on energy conversion and storage (cathodes, anodes, supercapacitors, solar cells, among others), including novel methods of synthesis, characterization and evaluation of the electrochemical and optical properties. He has published about 180 papers in various international journals and given over 50 talks at various conferences. His h-index is 21 with over 1500 citations and he has served as reviewer for several high impact journals and as an editorial board member. Dr. M.Anusuya, M.Sc., M.Phil., B.Ed., PhD is specialized in Material science, Thin Film Technology, Nano Science, and Crystallography. She is working as a Registrar of Indra Ganesan Group of Institutions, Trichy, Tamilnadu, India. Earlier to this, she served as a Vice-Principal at Trichy Engineering College, Trichy, Tamilnadu, India.. Being an administrator and teacher, with more than 25 years’ experience, for her perpetual excellence in academics she has been recognized with many awards. She has received over 45 awards in Academic and Social Activity. She has published more than 30 research papers in National and International journals, 7 chapters in edited books, 5 patents, presented 50 papers in the conferences and organized more than 200 webinars, both national and internationally. Dr Assumpta C. Nwanya is a Lecturer and a FLAIR (Future Leaders - African Independent Research) Scholar at the Department of Physics and Astronomy, University of Nigeria, Nsukka. She obtained her PhD in 2017 (University of Nigeria, Nsukka) with specialisation in the synthesis of nanostructured materials for applications in photovoltaics and electrochemical energy storage (batteries and supercapacitors) as well as for sensing. She was a Postdoctoral Fellow under the UNESCO-University of South Africa (UNISA) Africa Chair in Nanoscience and Nanotechnology (2018-2020). She is a research Affiliate with the SensorLab, University of the Western Cape Sensor Laboratories, Cape Town, South Africa. Dr Nwanya is a very active researcher and has published more than 85 scientific articles in high impact journals and has a Google Scholar’s H-index of 24 and 1475 citations.