This review article by Zenan Yu, Laurene Tetard, Lei Zhai, and Jayan Thomas discusses the recent progress in designing nanostructured electrode materials for supercapacitors, focusing on materials ranging from zero to three dimensions. The authors highlight the impact of nanostructures on key properties such as specific capacitance, rate capability, and cycle stability, which are crucial for the performance of supercapacitors. They emphasize the importance of understanding the relationship between structural properties and electrochemical performance, providing insights into the next generation of supercapacitor electrode design. The article begins by outlining the broader context of energy storage systems, particularly the need for sustainable and renewable energy resources. It then delves into the specific challenges and advancements in supercapacitor technology, including the limitations of current energy densities and the potential of nanostructured materials to address these issues. The review is divided into sections covering 0D, 1D, 2D, and 3D nanostructures. For each dimension, the authors discuss the synthesis methods, structural characteristics, and electrochemical performance of various materials. Key examples include solid, hollow, and core-shell 0D nanostructures, nanorods, nanowires, and nanotubes, as well as 1D heterostructures and 2D materials. The article also explores the advantages of nanostructured materials, such as enhanced surface area, improved electronic and ionic conductivity, and better mechanical and chemical stability. It highlights the potential of perovskite materials and conducting polymers in supercapacitor applications. Overall, the review provides a comprehensive overview of the current state of research in nanostructured supercapacitor electrode materials, offering valuable insights for researchers and engineers working in this field.This review article by Zenan Yu, Laurene Tetard, Lei Zhai, and Jayan Thomas discusses the recent progress in designing nanostructured electrode materials for supercapacitors, focusing on materials ranging from zero to three dimensions. The authors highlight the impact of nanostructures on key properties such as specific capacitance, rate capability, and cycle stability, which are crucial for the performance of supercapacitors. They emphasize the importance of understanding the relationship between structural properties and electrochemical performance, providing insights into the next generation of supercapacitor electrode design. The article begins by outlining the broader context of energy storage systems, particularly the need for sustainable and renewable energy resources. It then delves into the specific challenges and advancements in supercapacitor technology, including the limitations of current energy densities and the potential of nanostructured materials to address these issues. The review is divided into sections covering 0D, 1D, 2D, and 3D nanostructures. For each dimension, the authors discuss the synthesis methods, structural characteristics, and electrochemical performance of various materials. Key examples include solid, hollow, and core-shell 0D nanostructures, nanorods, nanowires, and nanotubes, as well as 1D heterostructures and 2D materials. The article also explores the advantages of nanostructured materials, such as enhanced surface area, improved electronic and ionic conductivity, and better mechanical and chemical stability. It highlights the potential of perovskite materials and conducting polymers in supercapacitor applications. Overall, the review provides a comprehensive overview of the current state of research in nanostructured supercapacitor electrode materials, offering valuable insights for researchers and engineers working in this field.