第 43卷第 2期 2017年 2月 北 京 工 业 大 学 学 报 Vol. 43 No. 2 Feb. 2017 JOURNAL OF BEIJING UNIVERSITY OF TECHNOLOGY 烧结电窑炉：实验炉、网带炉、推板炉、辊道炉、回转炉、然气炉 咨询电话：15161676091 周飞，微信同号 锂离子电池负极材料多孔硅 /硅铁合金的 制备及性能 于志辉,刘丹丹,寇艳娜 (北京工业大学区域大气复合污染防治北京市重点实验室,北京摇 100124) 摘摇要:为改善锂离子电池硅负极材料的电化学性能,利用镁热还原法制备了不同铁掺杂量的多孔硅/硅铁合金复 合材料,并对其结构以及在锂离子电池中的充放电性能进行了研究.材料均呈现多孔结构,硅铁合金均匀分布在孔 道内部.多孔硅/硅铁合金复合材料具有较好的循环稳定性,在 0郾 1C倍率下循环 100圈后可逆容量为 1 133郾 5 mA· h/ g,容量保持率为 66% ;在 1C倍率下可逆容量仍可以达到 776郾 9 mA·h/ g. 关键词:锂离子电池;多孔结构;硅铁合金;循环稳定性 锂电资料分享 Q群：103946996 中图分类号: O 646 文献标志码: A 文章编号: 0254 -0037(2017)02 -0278 -07 doi: 10. 11936/ bjutxb2016010005 Preparation and Pproperties of Si/ Si鄄Fe Alloy Porous Composite as Anode Material in Lithium鄄ion Battery YU Zhihui, LIU Dandan, KOU Yanna (Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China) Abstract: In order to modify the electrochemical properties of Si anode for lithium ion batteries, a series of porous Si/ Si鄄Fe alloy composites with different amounts of Fe doping were prepared by magnesium reduction process. The morphology and microstructure of the as鄄prepared composites were investigated. The electrochemical performance of the composites as anode materials for lithium鄄ion batteries were evaluated by galvanostatical charge鄄discharge testing. The composites show a porous structure with the uniform distribution of Si鄄Fe alloy inside the pores and possess remarkable cycle stability with a capacity of 1 133郾 5 mA·h/ g at 0郾 1C after 100 cycles, a capacity retention ratio of 66% and a reversible capacity of 776郾 9