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首页> 外文期刊>RSC Advances >In situ sonochemical synthesis of luminescent Sn@C-dots and a hybrid Sn@C-dots@Sn anode for lithium-ion batteries
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In situ sonochemical synthesis of luminescent Sn@C-dots and a hybrid Sn@C-dots@Sn anode for lithium-ion batteries

机译：原位的声音化合成发光Sn @ C点和锂离子电池的混合动力SN @ C-Dots @ Sn阳极

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摘要

A facile sonochemical approach is employed for the in situ formation of C-dots via ultrasonic irradiation of polyethylene glycol (PEG) solvent and its decomposition. Metallic bulk tin was added to the reaction vessel and heated to its melting point (234 degrees C) in the presence of polyethylene glycol 400. The two-phase mixture was sonicated to yield Sn@C-dots and subsequently to achieve Sn nanoparticles decorated with Sn@C-dots (Sn@C-dots@Sn). The fluorescence (luminescence) properties of Sn@C-dots are different from those of the C-dots alone and change as a function of excitation wavelength. The as-synthesized Sn@C-dots@Sn nanoparticles were directly deposited on the copper foil current collector as a promising anode for Li-ion batteries. Encouraging lithiation and delithiation properties are obtained with high coulombic efficiency and enhanced rate capabilities for the hybrid Sn@C-dots@Sn nanoparticles, owing to the conducting carbon dot network on the tin nanoparticles minimizing pulverization effects. Methodical studies on morphology (SEM, TEM), structure (XRD, HR-TEM) and compositions (XPS, EDS) are carried out on the Sn@C-dots and electroactive Sn@C-dots@Sn nanoparticles to understand the reaction mechanism and their luminescence and battery anode properties.
机译：通过超声丁二醇（PEG）溶剂的超声辐射及其分解，用于通过超声波照射而用于原位形成C点的化学化学方法。在聚乙二醇400的存在下加入金属本体锡并在其熔点（234℃）中加热到其熔点（234℃）。将两相混合物超声处理，得到SN @ C-点，随后达到用的Sn纳米粒子sn @ c-dots（sn @ c-dots @ sn）。 SN @ C点的荧光（发光）特性与单独的C点的荧光（发光）性质不同，并且作为激发波长的函数变化。作为锂离子电池的有望阳极直接沉积在铜箔集电器上的AS合成的SN @ C-DOT @ Sn纳米粒子。由于在锡纳米粒子上最小化粉碎效应的锡纳米颗粒上的导电碳点网络，以高库仑效率和杂种Sn @ C-Dots @ Sn纳米颗粒的增强率能力获得了促进锂化和脱锂性能。在SN @ C点和电活性SN @ C-DOTS @ Sn纳米粒子上进行了关于形态学（SEM，TEM），结构（XRD，HR-TEM）和组合物（XPS，EDS）的方法研究，以了解反应机制及其发光和电池阳极特性。

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  • 来源
    《RSC Advances》 |2016年第70期|共10页
  • 作者

    Kumar Vijay Bhooshan; Tang Jialiang; Lee Kay Jangweon; Pol Vilas G.; Gedanken Aharon;

  • 作者单位

    Bar Ilan Univ Dept Chem IL-52900 Ramat Gan Israel;

    Purdue Univ Sch Chem Engn 480 Stadium Mall Dr W Lafayette IN 47907 USA;

    Purdue Univ Sch Chem Engn 480 Stadium Mall Dr W Lafayette IN 47907 USA;

    Purdue Univ Sch Chem Engn 480 Stadium Mall Dr W Lafayette IN 47907 USA;

    Bar Ilan Univ Dept Chem IL-52900 Ramat Gan Israel;

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  • 正文语种 eng
  • 中图分类 化学;
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