Li-doping and electrochemical performance of P2-type layered oxide cathode materials for sodium-ion batteries

Trace Al/Ti co-doping in P2-type layered oxide cathodes toward ultra-stable and fast sodium-ion storage.

Layered oxide cathodes for sodium-ion batteries (SIBs) often suffer from structural degradation and increased interfacial resistance during prolonged cycling. In this research, an Al/Ti dual-doping synergistic strategy is employed on P2-type Na0.8Al0.02Ti0.02(Ni0.4Mn0.6)0.96O2 (NNATM) to simultaneously regulate both th...

Formation and Electrochemical Role of an Ultrathin Compositionally Complex Interfacial Layer on O3-Type Layered Cathodes

Sodium-ion batteries (SIBs) have emerged as promising alternatives for large-scale energy storage owing to the abundance and low cost of sodium. However, layered oxide cathodes suffer from severe surface degradation and irreversible phase transitions during high-voltage cycling, limiting their electrochemical perform...

Carbon-Coated Te-Doped Bi₂Se₃ as a Topological Quantum Anode Material for Sodium-Ion Batteries

Sodium-ion batteries (SIBs) are increasingly investigated as cost-effective alternatives to lithium-ion systems for large-scale energy storage; however, the development of stable and conductive anode materials remains a major challenge. In this work, tellurium-doped bismuth selenide (Te-doped Bi₂Se₃) was synthesized an...

Role of Ligand-to-Metal Charge Transfer in Anionic Redox Activity of the Layered Oxide Cathode for Na-Ion Batteries

Developing high-performance cathode materials is crucial for advancing grid-scale sodium-ion batteries (SIBs). Here, we introduce a P2-type layered oxide cathode material, Na0·67Ni0·33Mn0·51Ru0·16O2, which demonstrates exceptional electrochemical performance through a robust dual cationic–anionic redox mechanism. Thi...

Expanding Catalytic Active Surface via Dual-Phase Interfaces for High-Energy-Density Quasi-Solid-State Na–S Batteries

Quasi-solid-state sodium–sulfur (Na–S) batteries are widely regarded as promising candidates for next-generation energy storage due to their higher energy density and enhanced safety over traditional liquid-electrolyte counterparts. However, electrolyte solidification restricts ion transport within the sulfur cathode,...

Electrochemical performance and lithiation mechanism of Sb2Te3 composite anodes with sulfide and hydride electrolytes for all-solid-state lithium-ion batteries