Pisiform Homojunction with Energy Band Bending Induced via Co-Implantation Design Enabling Fast-Charging Sodium-Sulfur Battery

A novel “induced-homojunction” concept is first applied to achieve fast-charging Na–S batteries. Homojunction interface regulation enables high-efficiency NaPSs capture and fast conversion reaction kinetics. Na–S battery shows high specific capacity and superior rate performance with ultrahigh capacity retention up to 88.8% at 1 A g⁻¹. And the battery delivers a stable discharge capacity independently from the charging rate (even at 5 A g⁻¹).