| 中空海胆状结构的碳包覆Fe2O3用作锂离子电池的高性能负极材料 |
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| 引用本文： | 冯雨歌,束娜,谢兼,柯飞,朱彦武,朱俊发. 中空海胆状结构的碳包覆Fe2O3用作锂离子电池的高性能负极材料[J]. SCIENCE CHINA Materials, 2021, 0(2): 307-317 |
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| 作者姓名： | 冯雨歌 束娜 谢兼 柯飞 朱彦武 朱俊发 |
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| 作者单位： | National Synchrotron Radiation Laboratory;Hefei National Research Center for Physical Science at the Microscale CAS Key Laboratory of Materials for Energy Conversion&Department of Materials Science and Engineering;Department of Applied Chemistry and State Key Laboratory of Tea Plant Biology and Utilization |
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| 基金项目： | financially supported by the National Key R&D Program of China (2017YFA0403402 and 2019YFA0405601);the National Natural Science Foundation of China(21773222,U1732272 and U1932214);the DNL Cooperation Fund,and Chinese Academy of Sciences (DNL180201) |
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| 摘 要： | Fe2O3由于成本低廉,储量丰富和理论比容量高(1007 mA hg^-1)等特点,在锂离子电池负极材料的应用中极具发展前景.然而一些问题仍然存在,如:充放电过程中比容量的迅速衰减,不可逆的体积膨胀以及较短的循环寿命等.这些问题严重制约了Fe2O3在锂离子电池中的实际应用.为了突破这些局限,本文以金属-有机骨架(MOF...
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| 关 键 词： | 锂离子电池 负极材料 循环寿命 充放电过程 理论比容量 充放电循环 放电容量 碳包覆 |
Carbon-coated Fe2O3 hollow sea urchin nanostructures as high-performance anode materials for lithium-ion battery |
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| Yuge Feng,Na Shu,Jian Xie,Fei Ke,Yanwu Zhu,Junfa Zhu. Carbon-coated Fe2O3 hollow sea urchin nanostructures as high-performance anode materials for lithium-ion battery[J]. , 2021, 0(2): 307-317 |
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| Authors: | Yuge Feng Na Shu Jian Xie Fei Ke Yanwu Zhu Junfa Zhu |
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| Affiliation: | (National Synchrotron Radiation Laboratory,Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes,University of Science and Technology of China,Hefei,230029,China;Hefei National Research Center for Physical Science at the Microscale CAS Key Laboratory of Materials for Energy Conversion&Department of Materials Science and Engineering,University of Science and Technology of China,Hefei,230026,China;Department of Applied Chemistry and State Key Laboratory of Tea Plant Biology and Utilization,Anhui Agricultural University,Hefei,230026,China) |
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| Abstract: | Fe2O3 has become a promising anode material in lithium-ion batteries (LIBs) in light of its low cost, high theoretical capacity (1007 mA h g^−1) and abundant reserves on the earth. Nevertheless, the practical application of Fe2O3 as the anode material in LIBs is greatly hindered by several severe issues, such as drastic capacity falloff, short cyclic life and huge volume change during the charge/discharge process. To tackle these limitations, carbon-coated Fe2O3 (Fe2O3@MOFC) composites with a hollow sea urchin nanostructure were prepared by an effective and controllable morphology-inherited strategy. Metal-organic framework (MOF)-coated FeOOH (FeOOH@-MIL-100(Fe)) was applied as the precursor and self-sacrificial template. During annealing, the outer MOF layer protected the structure of inner Fe2O3 from collapsing and converted to a carbon coating layer in situ. When applied as anode materials in LIBs, Fe2O3@MOFC composites showed an initial discharge capacity of 1366.9 mA h g^−1 and a capacity preservation of 1551.3 mA h g^−1 after 200 cycles at a current density of 0.1 A g^−1. When increasing the current density to 1 A g^−1, a reversible and high capacity of 1208.6 mA h g^−1 was obtained. The enhanced electrochemical performance was attributed to the MOF-derived carbon coating layers and the unique hollow sea urchin nanostructures. They mitigated the effects of volume expansion, increased the lithium-ion mobility of electrode, and stabilized the as-formed solid electrolyte interphase films. |
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| Keywords: | lithium-ion battery transition metal oxide MOF-derived carbon anode hollow sea urchin nanostructures |
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