Nanostructured porous carbon materials, derived from spent coffee grounds, are increasingly being used as active materials for electrochemical energy storage devices, such as supercapacitors and batteries. These carbon materials possess a unique nanostructure and porous nature, which provides a large surface area, facilitating rapid ion diffusion and enhancing charge storage capacity. Furthermore, the use of coffee waste as a precursor material provides an environmentally sustainable solution, reducing dependence on traditional carbon sources and contributing to waste valorisation efforts. As research in this field progresses, the development of efficient and cost-effective energy storage devices using coffee waste (spent coffee grounds) shows promise for renewable energy applications.