Fabrication of Uniform Fe3O4 Nanocubes Derived from Prussian Blue and Enhanced Performance for Lithium Storage Properties.

Owing to the special structural characteristics, oxide derivatives of Prussian blue (PB)-based hollow structures are widely used in electrochemical energy storage and conversion. Here, Fe3O4 particles have been synthesized by one-step thermal decomposition of PB. The cube-sized iron-based PB and structural stability of thermal decomposition products at different amount of polyvinyl pyrrolidone (PVP) were well investigated. In the derivatived architecature, the hollow Fe3O4 nanocubes provide high-efficiency lithium ion transporation and the diffusion of electrolyte, enabling better electrochemical performance. The as-obtained Fe3O4 nanocubes show a remarkable rate capability (462 mAh g − 1 at 1.0 A/g) and outstanding specific capacity (803 mAh g − 1 at 0.1 A/g, 97.5% capacity retention over 140 cycles), which have a potential application as anode materials for lithium ion batteries due to the facile preparation method and high electrochemical performance. The hollow Fe3O4 nanocubes prepared by one-step thermal decomposition of PB provide high-efficiency lithium ions transporation and diffusion of electrolyte, enabling better electrochemical performance. The as-obtained Fe3O4 nanocubes show a remarkable rate capability (462 mAh g–1 at 1000 mA g–1) and outstanding specific capacity (803 mAh g–1 at 100 mA g–1, 97.5% capacity retention over 140 cycles). [ABSTRACT FROM AUTHOR]