Nb⁵⁺ concentration-gradient driven lattice and charge coupling for structural and interfacial stability in cobalt-free high-nickel cathodes

Key Points

• Structural stability is significantly reinforced by concentration-gradient mechanisms, leading to improved battery performance.
• Key changes in lattice stability observed, supporting longer cycle life for high-nickel cathodes in practical applications.
• Charge coupling effects are critical for maintaining interfacial integrity during cycling, enhancing safety and efficiency.
• The implications may enable the development of sustainable energy solutions by reducing reliance on cobalt-based materials.