Selenium-infiltration-driven interfacial tailoring enables high-performance sodium-ion battery anodes

Abstract

A novel strategy leveraging selenium infiltration to induce interfacial Cu_1.8Se formation significantly enhances the sodium storage performance of anatase TiO₂. This approach improves capacity, cyclability, and Na⁺ transport kinetics, and demonstrates potential generalizability in other oxide electrode systems, offering a viable route to unlock the potential for high-performance sodium-ion battery anodes.