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首页> 外文期刊>RSC Advances >Liquefied walnut shell-derived carbon nanofibrous mats as highly efficient anode materials for lithium ion batteries
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Liquefied walnut shell-derived carbon nanofibrous mats as highly efficient anode materials for lithium ion batteries

机译：液化核桃壳衍生的碳纳米纤维垫作为锂离子电池的高效阳极材料

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摘要

Mechanically flexible walnut shell-derived carbon nanofibers (CNFs) of 175 nm diameter were fabricated from a liquefied walnut shell-polyvinyl alcohol (PVA) hybrid solution via conventional electrospinning followed by one-step carbonization. The morphology and structure properties, as well as pore structure properties of walnut shell-derived CNFs were comprehensively characterized by field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and their electrochemical performances were evaluated for the first time as electrode materials in lithium ion batteries, without addition of any conductive agent or binder. The walnut shell-derived CNFs mats exhibited a high specific capacity above 150 mA h g(-1) with an initial efficiency of 50.4% at a current density of 100 mA g(-1) and good cycle stability at different current rates (above 200 and 120 mA h g(-1) at 20 and 1000 mA g(-1), respectively). After 100 cycles at a current density of 100 mA g(-1), walnut shell-derived CNF mats still maintained a good capacity of about 150 mA h g(-1). This demonstrated the great prospect of walnut shell-derived CNF mats as electrode materials for applications in electrical energy storage.
机译：机械175纳米直径的柔性核桃壳衍生的碳纳米纤维（碳纳米纤维）被从液化核桃壳 - 聚乙烯醇（PVA）通过常规电纺丝，随后的一步碳化混合溶液制造。核桃壳衍生CNF的形态和结构特性，以及孔结构性能进行了全面的特征在于场发射扫描电子显微镜（FE-SEM），X射线光电子能谱（XPS），拉曼光谱，和它们的电化学性能首次作为电极材料在锂离子电池进行了评价，在不添加任何导电剂或粘合剂。核桃壳衍生的CNF垫在100mA g的电流密度（-1）和良好的循环稳定性在不同的电流率表现出与50.4％的初始效率高比容量以上150毫安汞柱（-1）（高于200和120毫安汞柱（-1），在20和千毫安克（-1），分别地）。在100mA g的电流密度在100次循环后（-1），胡桃壳衍生CNF盘碗垫仍保持约150毫安ħ克（-1）良好的容量。这证明核桃壳衍生CNF垫作为电极材料用于在电能存储应用的巨大前景。

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  • 来源
    《RSC Advances》 |2017年第43期|共8页
  • 作者

    Tao Lei; Zheng Yunwu; Zhang Yanhua; Ma Huan; Di Mingwei; Zheng Zhifeng;

  • 作者单位

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Southwest Forestry Univ Univ Key Lab Biomass Chem Refinery &

    Synth Coll Mat Engn Engn Lab Highly Efficient Utilizat Biomass Kunming 650224 Yunnan Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Southwest Forestry Univ Univ Key Lab Biomass Chem Refinery &

    Synth Coll Mat Engn Engn Lab Highly Efficient Utilizat Biomass Kunming 650224 Yunnan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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