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镁热还原法制备多孔硅碳复合负极材料

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Abstract:

分别以介孔二氧化硅(SBA-15和MCM-48)和硅藻土为硅源,通过镁热还原制备多孔硅,然后向多孔硅中注入有机碳前躯体,经过高温碳化处理得到多孔Si/C复合负极材料。采用X射线衍射仪、Raman光谱仪、场发射扫描电子显微镜和N2吸附脱附测试仪对合成的材料分别进行了表征,研究了多孔Si/C复合材料的电化学性能。结果表明镁热还原介孔二氧化硅可以得到多孔硅材料,碳加入到多孔硅材料中可以有效提高材料的电子电导率,可明显改善材料的循环稳定性。同时多孔结构可以有效缓解硅基材料充放电过程中的体积应力,提高材料的循环稳定性。以SBA-15、MCM-48和硅藻土为硅源制备得到的3种多孔Si/C复合材料在200mA/g电流密度下循环30次之后的可逆容量分别为712、664、463mA·h/g。

References

[1]  ? BOUKAMP B A, LESH G C, HUGGINS R A. All-solid lithium electrodes with mixed-conductor matrix [J]. J Electrochem Soc, 1981, 128(4): 725–729.
[2]  ? LI H, HUANG X J, CHEN L Q, et al. A high capacity nano-Si composite anode material for lithium rechargeable batteries [J]. Electrochem Solid State Lett, 1999, 2(11): 547–549.
[3]  ? PARK M H, KIM M G, JOO J, et al. Silicon naotubes battery anodes [J]. Nano Lett, 2009, 9(11): 3844–3847.
[4]  ? SONG T, XIA J L, LEE J H, et al. Arrays of sealed silicon nanotubes as Anodes for lithium ion batteries [J]. Nano Lett, 2010, 10(5): 1710–1716.
[5]  ? YAO Y, MCDOWELL M T, RYU I, et al. Interconnected sillicon hollow nanospheres of lithium-ion battery anodes with long cycle life [J]. Nano Lett, 2011, 11(7): 2949–2954.
[6]  ? TAO H C, FAN L Z, QU X H. Facile synthesis of ordered porous Si@C nanorods as anode materials for Li-ion batteries [J]. Electrochim Acta, 2012, 71: 194–200.
[7]  ? TAO H C, HUANG M, FAN L Z, et al. Interweaved Si@SiOx/C nanoporous spheres as anode materials for Li-ion batteries [J]. Solid State Ionics, 2012, 220: 1–6.
[8]  ? TAO H C, FAN L Z, MEI Y F, et al. Self-supporting Si/Reduced graphene oxide nanocomposite films as anode for lithium ion batteries [J]. Electrochem Commun, 2011, 13(12): 1332–1335.
[9]  ? WANG M S, FAN L Z, HUANG M, et al. Conversion of diatomite to porous Si/C composite as promising anode materials for lithium-ion batteries [J]. J Power Source, 2012, 219(1): 29–35.
[10]  ? LEE H, CHO J. Sn78Ge22@carbon core-shell nanowires as fast and high- capacity lithium storage media [J]. Nano Lett, 2007, 7(9): 2638–2641.
[11]  ? LIU Y, HANAI K, YANG J, et al. Silicon/carbon composites as anode materials for Li-ion batteries [J]. Electrochem Solid-State Lett, 2004, 7(10): A369–A372.
[12]  ? IM I, KUMTA P N, BLOMGREN G E. Si/TiN nanocomposites novel anode materials for Li-ion batteries [J]. Electrochem Solid State Lett, 2000, 3(11): 493–496.
[13]  ? KIM I, BLOMGREN G E, KUMTA P N. Nanostructured Si/TiB2 composite anodes for Li-ion batteries [J]. Electrochem Solid State Lett, 2003, 6(8): A157–A161.
[14]  ? ?
[15]  ? 张瑞, 姜训勇. 金属硅的储锂性能[J]. 硅酸盐学报, 2013, 41(2): 159–164.
[16]  ZHANG Rui, JIANG Xunyong. J Chin Ceram Soc, 2013, 41(2): 159–164.
[17]  ? CHAN C K, PENG H L, LIU G, et al. High-performance lithium battery anodes using silicon nanowires [J]. Nat Nanotechnol, 2008, 3(1): 31–35.

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