The article "Perspectives for Electrochemical Capacitors and Related Devices" by Patrice Simon and Yury Gogotsi reviews the progress and future prospects in the field of electrochemical capacitors (ECs). ECs, which store electrical energy through surface-confined processes, offer high power density and long cycle life, making them suitable for applications such as power electronics, transportation, and renewable energy storage. The authors discuss the limitations of batteries, particularly in terms of energy density and charging time, and highlight the complementary nature of ECs. They emphasize the importance of developing new nanostructured electrode materials and electrolytes to maximize energy and power delivery. The review covers electrical double-layer capacitors (EDLCs) based on high-surface-area carbons, pseudocapacitive materials like oxides and MXenes, and micro-devices for the Internet of Things (IoT). Key advances in understanding the fundamental science driving EDLC performance, such as ion confinement in nanoporous carbon, are discussed. The authors also explore the potential of hybrid electrochemical capacitors (HECs) that combine battery and capacitive electrodes, and the development of micro-supercapacitors (MSCs) for IoT and wearable electronics. The article provides insights into the challenges and opportunities in improving EC performance and highlights the need for interdisciplinary research to push the boundaries of energy storage technology.The article "Perspectives for Electrochemical Capacitors and Related Devices" by Patrice Simon and Yury Gogotsi reviews the progress and future prospects in the field of electrochemical capacitors (ECs). ECs, which store electrical energy through surface-confined processes, offer high power density and long cycle life, making them suitable for applications such as power electronics, transportation, and renewable energy storage. The authors discuss the limitations of batteries, particularly in terms of energy density and charging time, and highlight the complementary nature of ECs. They emphasize the importance of developing new nanostructured electrode materials and electrolytes to maximize energy and power delivery. The review covers electrical double-layer capacitors (EDLCs) based on high-surface-area carbons, pseudocapacitive materials like oxides and MXenes, and micro-devices for the Internet of Things (IoT). Key advances in understanding the fundamental science driving EDLC performance, such as ion confinement in nanoporous carbon, are discussed. The authors also explore the potential of hybrid electrochemical capacitors (HECs) that combine battery and capacitive electrodes, and the development of micro-supercapacitors (MSCs) for IoT and wearable electronics. The article provides insights into the challenges and opportunities in improving EC performance and highlights the need for interdisciplinary research to push the boundaries of energy storage technology.