Ion-Mediated Carbon Microdomain Engineering Boosting Enhanced Plateau Capacity of Carbon Anode under High Rate Towards High-Performance Sodium Dual-Ion Batteries

• Carbon microdomain engineering using ion-mediated structural control tailors oriented high-activity nitrogen species and creates specific closed pores. • This strategy accelerates sodium-ion desolvation kinetics, thereby enhancing sodium storage performance even at high current densities. • The optimized carbon material achieves exceptional rate performance and cycling stability, making it one of the top-tier materials for sodium-ion batteries. • The MEC3||expanded graphite dual-ion battery demonstrates unprecedented cycling stability with 80.6% capacity retention after 10,000 cycles at 10 C.