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首页> 外文期刊>Journal of nano research >Preparation and characterization of intermetallic nanoparticles for lithium ion batteries
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Preparation and characterization of intermetallic nanoparticles for lithium ion batteries

机译：锂离子电池金属间纳米粒子的制备与表征

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摘要

Nanoparticles based on tin compounds and alloys have been prepared by using the polyol and/or sonochemical methods. Thus, nanoparticulated Fe_(1-x)Co_xSn_2 solid solutions were prepared by using the polyol method or, alternatively, a combination of the polyol and the sonochemical methods, and the Rietveld refinements of the XRD patterns confirm the formation of the solid solutions solutions. Pure or pyrolyzed polyacrylonitrile (PAN) can be used to create a matrix that encapsulate the metallic particles and improve the electrochemical cycling behavior. Thus, MSn_2@PAN (where M=Fe or Co) have been prepared by using dimethylformamide like solvent of PAN and applying high-intensity ultrasonication to achieve small particle size, poor crystallinity and high dispersion. The very small particles of MSn_2 exhibit higher tendency to be oxidized in air atmosphere than the larger particles. The very small particle size of the alloy and the organic phase (PAN) contribute to stabilize the interfaces and the contacts in the electrode, as is evidenced by the electrochemical cycling and the impedance spectra. A model is proposed for the electrochemical behavior of the MSn_2@PAN electrode materials. MSn_2@C materials can be prepared throughout the pyrolysis of the PAN molecules matrix.
机译：通过使用多元醇和/或声化学方法已经制备了基于锡化合物和合金的纳米颗粒。因此，通过使用多元醇方法或者多元醇和声化学方法的组合来制备纳米粒子化的Fe_（1-x）Co_xSn_2固溶体，并且XRD图的Rietveld精制证实了固溶体溶液的形成。纯的或热解的聚丙烯腈（PAN）可用于创建封装金属颗粒并改善电化学循环行为的基质。因此，已经通过使用类似于PAN的二甲基甲酰胺的溶剂并​​应用高强度超声处理来获得MSn_2 @ PAN（其中M ＝ Fe或Co），以实现小粒径，差的结晶度和高分散性。与较大的颗粒相比，非常小的MSn_2颗粒在空气中表现出更高的氧化趋势。合金和有机相（PAN）的非常小的粒径有助于稳定电极中的界面和接触，如电化学循环和阻抗谱所证明的。提出了一种MSn_2 @ PAN电极材料的电化学行为模型。可以在PAN分子基质的整个热解过程中制备MSn_2 @ C材料。

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  • 来源
    《Journal of nano research》 |2012年第2012期|p.53-65|共13页
  • 作者

    Uche. G. Nwokeke; Francisco Nacimiento; Josee R. Gonzaelez; Ricardo Alcaentara; Josee L. Tirado; Carlos Peerez-Vicente;

  • 作者单位

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

    Laboratorio de Quiemica Inorgaenica, Campus de Rabanales, Universidad de Coerdoba, Edificio C3,Planta 1 14071 Coerdoba, SPAIN;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tin; intermetallics; lithium ion batteries; nanoparticles; polyol method; ultrasonication;

    机译：锡;金属间化合物锂离子电池;纳米粒子多元醇法超音波;

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