Engineering Mesoporous Single Crystals Co-Doped Fe₂O₃ for High-Performance Lithium Ion Batteries

To achieve high-efficiency lithium ion batteries (LIBs), an effective active electrode material is vital. For the first time, mesoporous single crystals cobalt-doped Fe₂O₃ (MSCs Co-Fe₂O₃) is synthesized using formamide as a pore forming agent, through a solvothermal process followed by calcination. Compared with mesoporous single crystals Fe₂O₃ (MSCs Fe₂O₃) and cobalt-doped Fe₂O₃ (Co-Fe₂O₃), MSCs Co-Fe₂O₃ exhibits a significantly improved electrochemical performance with high reversible capacity, excellent rate capability, and cycling life as anode materials for LIBs. The superior performance of MSCs Co-Fe₂O₃ can be ascribed to the combined structure characteristics, including Co-doping and mesoporous single-crystals structure, which endow Fe₂O₃ with rapid Li⁺ diffusion rate and tolerance for volume change.