Defect‐Guided Etching of Coal Tar Pitch Toward Hierarchical Porous Carbon Cathodes for High‐Energy Sodium‐Ion Capacitors
Sodium‐ion capacitors (SICs) are promising candidates for high‐power energy storage, yet their practical energy density is severely constrained by the limited anion‐storage capacity, sluggish interfacial kinetics, and insufficient cathode/electrolyte stability at high operating voltages. Herein, we present a defect...