Transition metal oxides Fe2O3 as lithium‐ion battery anode has aroused intense interest as a result of its high capacity (1007 mA h g−1). Nevertheless, the significant volume expansion during the cycling procession causes its capacity to decay sharply as the anode of lithium‐ion battery. The size and morphology of materials are important factors improving the stability of electrode materials. However, most of the excellent morphology design needs complex processes. The single‐crystalline erythrocyte‐like α‐Fe2O3 nanoparticles are synthesized by one‐step hydrothermal method to improve the electrochemical properties of the α‐Fe2O3 anode, and the Li+ storage kinetics of the erythrocyte‐like α‐Fe2O3 anode are investigated. As a lithium‐ion battery anode material, the erythrocyte‐like α‐Fe2O3 anode exhibits an eminent reversible capacity of 1200.2 mA h g−1 at 0.1 C after 100 cycles. In comparison to raw α‐Fe2O3, the erythrocyte‐like α‐Fe2O3 performs with a better rate property. The special morphological design can effectively improve the stability of α‐Fe2O3 electrode materials.

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In this paper, Zn-doped spherical nano SnO2 lithium-ion battery anode materials were prepared by hydrothermal synthesis using surfactants. The physical and chemical characterization of the composite material was studied by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, constant-current cycling and electrochemical impedance spectroscopy. When the doped content is 10 wt %, the cyclic stability and rate performance are better than other materials, and the discharge capacity is about 250.5 mAhg−1 after 100 cycles. The electrochemical measurement results show that Zn-doped spherical nano SnO2 composites have broad application prospects.

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