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- W2896772077 abstract "Rapid capacity degradation and poor rate capability are still critical challenges for the utilization of iron oxides as high-capacity anodes of advanced Li-ion batteries (LIBs). To alleviate these problems, nanoengineering and surface coating are commonly adopted. However, the preparation of surface-coated nanostructures is usually complicated and consequently difficult and expensive to scale up. Herein, we demonstrate the successful simultaneous achievement of nanosizing and surface coating of iron oxides with a facile and scalable solid-state sintering process, which is of particularly practical importance for using these materials as anodes in LIBs. Heating mixtures of micron-sized Fe2O3 and NaBH4 to 350 °C gives rise to the formation of a NaBO2-coated Fe3O4 nanocomposite, thanks to the high reducing ability of NaBH4. The particle size of Fe3O4 ranges from 30 to 60 nm, and the thickness of the NaBO2 coating layer is 3–4 nm. While used the NaBO2-coated Fe3O4 nanocomposite as anode materials for LIBs, the prepared sample from Fe2O3–0.2NaBH4 delivers a stable discharge capacity as high as 1228 mAh g–1 after 400 charge/discharge cycles at 100 mA g–1, exhibiting a significantly improved cycling duration. Moreover, the specific capacity also reaches 733 mAh g–1 even cycling at 2 A g–1. These excellent electrochemical performances mainly originate from the nanosized particles of the Fe3O4 matrix and the high viscosity and good ionic conductivity of the NaBO2 coating layer." @default.
- W2896772077 created "2018-10-26" @default.
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- W2896772077 date "2018-10-17" @default.
- W2896772077 modified "2023-10-13" @default.
- W2896772077 title "Solid-State Sintering Strategy for Simultaneous Nanosizing and Surface Coating of Iron Oxides as High-Capacity Anodes for Long-Life Li-Ion Batteries" @default.
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- W2896772077 doi "https://doi.org/10.1021/acsaem.8b01308" @default.
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