Porous sulfated metal oxide SO₄ ²⁻/Fe₂O₃ as an anode material for Li-ion batteries with enhanced electrochemical performance

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• 作者：Zhen Li ; Qianqian Lv ; Xiaoxiong Huang ; Yueyue Tan…
• 关键词：SO42−/Fe2O3 ; Li ; ion batteries ; Porous architecture ; Cycling stability ; Nanoparticles ; Energy storage
• 刊名：Journal of Nanoparticle Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：19
• 期：1
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanotechnology; Inorganic Chemistry; Characterization and Evaluation of Materials; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices;
• 出版者：Springer Netherlands
• ISSN：1572-896X
• 卷排序：19

文摘

Sulfated metal oxide SO₄2−/Fe₂O₃ was prepared by a novel facile sol–gel method combined with a subsequent heating treatment process. The as-synthesized products were analyzed by XRD, FTIR, and FE-SEM. Compared with the unsulfated Fe₂O₃, the agglomeration of particles has been alleviated after the incorporation of SO₄2−. Interestingly, the primary particle size of the SO₄2−/Fe₂O₃ (about 5 nm) is similar to its normal counterparts even after the calcination treatment. More importantly, SO₄2−/Fe₂O₃ exhibits a porous architecture, which is an intriguing feature for electrode materials. When used as anode materials in Li-ion batteries, SO₄2−/Fe₂O₃ delivered a higher reversible discharge capacity (992 mAh g−1), with smaller charge transfer resistance, excellent rate performance, and better cycling stability than normal Fe₂O₃. We believed that the presence of SO₄2− and porous architecture should be responsible for the enhanced electrochemical performance, which could provide more continuous and accessible conductive paths for Li+ and electrons.