Abstract

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[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1.0[Formula: see text]A/g) and outstanding specific capacity (803[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 0.1[Formula: see text]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.

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