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| Electrochemical properties of Si-Fe incorporated SiOx/graphite base anode materials |
| Author Name | Affiliation | E-mail | | YUAN Tian-Xiang | Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China | | | TANG Ren-Heng | Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China | | | LIU Jiang-Wen | Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China | | | XIAO Fang-Ming | Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China | | | WANG Ying | Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China | wy2228086@163.com | | ZENG Li-Ming | Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China | lmz2012chem@163.com |
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| Abstract: To solve the major defects of SiOx-based anode materials, composite materials with different Si-Fe content and SnO2 were deliberately prepared via a tandem strategy involving mechanical ball milling, spray drying, and high-temperature pyrolysis in this paper. Furthermore, the phase structures, microscopic morphologies, and electrochemical properties of as-obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive spectroscopy (EDS), and galvanostatic charge-discharge test system. The electrochemical results show that the composite containing a mass fraction of 5% Si-Fe possesses a relatively good comprehensive electrochemical performance with a charging capacity of 443.4 mAh·g-1 and the first Coulombic efficiency of 75.2%. After 310 cycles, the charging capacity still retained 369.1 mAh·g-1, and the capacity retention rate was up to 81.0%. Meanwhile, the lithium diffusion rate is remarkably improved after Si-Fe incorporation. |
| Keywords: Lithium-ion battery SiO-based anode ferrosilicon composite materials |
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| YUAN Tian-Xiang,TANG Ren-Heng,LIU Jiang-Wen,XIAO Fang-Ming,WANG Ying,ZENG Li-Ming.Electrochemical properties of Si-Fe incorporated SiOx/graphite base anode materials[J].Chinese Journal of Inorganic Chemistry,2023,39(6):1079-1090. |
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