Journal of the Chinese Ceramic Society, Volume. 52, Issue 10, 3252(2024)

Iron Silicide/Silicon Nanomaterials Derived from Iron/Acid-Montmorillonite for High Performance Lithium-Ion Battery Anode

DU Jing1...2,3, LI Xiangjun4, XIE Jieyang1,2,3, WEI Shoushu1,2,3, XIONG Tao1,2,3, HE Shiya1,2,3, CHEN Qingze1,2,3,*, and ZHU Runliang1,23 |Show fewer author(s)
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • 4[in Chinese]
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    Silicon is considered as one of the most promising lithium anode materials due to its high lithium storage capacity.However, the volume expansion effect and semiconductor properties of silicon hinder its practical application. Two effective strategies exist for mitigating this issue, i.e., reducing the size of silicon to nanoscale; and introducing non-active matrices to improve stability and conductivity. In recent decades, the incorporation of iron silicide (FeSi2) with silicon (Si) has attracted much attention due to its high conductivity, mechanical hardness and environmental friendliness. Unfortunately, the Si/FeSi2 nanocomposites are mainly prepared by high-energy ball milling, which has some drawbacks such as low purity, large particle size, and uncontrollable morphology, making it difficult to achieve the commercial application. Porous silica derived from clay minerals is extensively investigated for the preparation of silicon nanoparticles by magnesiothermic reduction. In addition, porous silica has a large specific surface area, which facilitates the effective dispersion and loading of iron oxides. The reduction of iron oxide and silica dioxide to Fe and Si can be achieved by magnesium. In this paper, a natural montmorillonite (Mnt) with a high content of silica (65%, in mass) was utilized as a raw material. Silicon/iron silicide (Si/FeSi2) nanocomposites were synthesized via modification of Mnt (including acid etching and iron loading) and molten salt-assisted magnesiothermic reduction.

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    DU Jing, LI Xiangjun, XIE Jieyang, WEI Shoushu, XIONG Tao, HE Shiya, CHEN Qingze, ZHU Runliang. Iron Silicide/Silicon Nanomaterials Derived from Iron/Acid-Montmorillonite for High Performance Lithium-Ion Battery Anode[J]. Journal of the Chinese Ceramic Society, 2024, 52(10): 3252

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    Paper Information

    Received: Feb. 12, 2024

    Accepted: --

    Published Online: Nov. 14, 2024

    The Author Email: Qingze CHEN (chenqingze@gig.ac.cn)

    DOI:10.14062/j.issn.0454-5648.20240122

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