Facilitating Sodium-Ion Diffusion in Fe-Doped Co₃O₄ for High-Rate Performance.

ABSTRACT: Due to its high theoretical capacity, cobalt oxide (Co₃O₄) 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 Co₃O₄ nanoparticles (Fe_xCo_3-xO₄ NPs). Both experimental and theoretical results confirm that iron (Fe) doping at octahedral sites within spinel structures is a critical factor in enhancing rate performance. The decreased bandgap and enlarged ion transport spacing originate in Fe doping. This effectively facilitates the electron and Na-ion (Na⁺) transport during discharge/charge processes, delivering an impressive r

SUBMITTER: Fu Y 

PROVIDER: S-EPMC12934381 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature