This book includes eight chapters, each of which details recent advances in energy research. Chapter One examines wave power absorption using wave energy converters. Chapter Two discusses various synthesis methods for zinc oxide nanostructures, nanogenerator fabrication, and tests its performance. Chapter Three investigates the feasibility of form-stable phase change materials for thermoelectric energy harvesting applications. Chapter Four utilizes the semiotic square analysis to identify and elaborate the semantic categories of energy transition ideologies. Chapter Five deals with pyrolysis of peanut shells examining two possible routes to enhance yield and/or quality of the resulting bio-oils and to improve sustainability. Chapter Six provides an introduction to synchrotron-based X-ray techniques for analyzing energy storage materials. Chapter Seven addresses the application of Weibull distribution to analyze wind energy aspects. Finally, Chapter Eight explores the optimal design parameters of a three-magnet electromagnetic vibration-based generator under subsea conditions.