Facilitating Sodium-Ion Diffusion in Fe-Doped CoO for High-Rate Performance.

Due to its high theoretical capacity, cobalt oxide (CoO) has attracted attention to sodium-ion battery (SIB) anodes. However, its low conductivity and poor rate performance have limited its practical application. This work proposes a co-precipitation doping strategy to synthesize iron-doped CoO nanoparticles (FeCoO NPs).