<p><b>Enables readers to quickly understand core issues and field development of sodium-ion capacitors</b><p><i>Sodium Ion Capacitors</i> summarizes and outlines the dynamics and development of sodium-ion capacitors, covering key aspects of the technology including background, classification and configuration, key technologies, and more, allowing readers to gain an understanding of sodium-ion capacitors from the perspective of both industrial technology and electrochemistry. <p><i>Sodium Ion Capacitors</i> includes information on: <ul><li>EDLC-type mechanism of SCs and battery-type mechanism of SIBs, definition and types of pseudocapacitance, and energy storage mechanism of pseudocapacitors</li><li>Cathode materials for sodium-ion capacitors, covering EDLC cathode materials, carbon nanotubes, reduced graphene oxide, and hollow carbon microspheres</li><li>Flexible battery-type anode and capacitive cathode sics cell configurations, including flexible electrodes based on carbon nanofiber,