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SiO2-carbon nanocomposite anodes with a 3D interconnected network and porous structure from bamboo leaves

机译：SiO2-碳纳米复合阳极，具有3D互连网络和竹叶的多孔结构

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摘要

To seek for a low-cost, green and sustainable method of preparing nanostructured carbon electrode materials, we are inspired by natural biomaterials. An amorphous SiO2-carbon nanocomposite (SiO2-C/NCs) with three-dimensional (3D) interconnected network and hierarchical porous structure is synthesized by thermal decomposition of abandoned bamboo leaves at 700 degrees C in N-2 atmosphere. The characterization results indicate that the SiO2-C/NCs inherited the natural hierarchical structure of the bamboo leaves. Compared with the commercialized graphite anode and other artificial nanostructured carbon materials, the SiO2-C/NCs anode shows a high lithium-storage capacity of 586.2 mA h g(-1) at 200 mA g(-1), with impressive good cycle stability (294.7 mA h g(-1) after 190 cycles) and ultra-high coulombic efficiency close to 100%. After 160 cycles at varied current densities from 200 mA g(-1) to 2000 mA g(-1), this anode still maintains a high discharge of 117.4 mA h g(-1). This simple, green and sustainable strategy will open a new avenue for large-scale preparation and application of nanostructured electrode materials from biomass materials.
机译：为了寻求低成本，绿色和可持续的制备纳米结构碳电极材料的方法，我们受到天然生物材料的启发。具有三维（3D）互连的网络和分层多孔结构的无定形SiO2-碳纳米复合材料（SiO2-C / NCS）通过在N-2气氛中700摄氏度的储物竹叶的热分解而合成。表征结果表明SiO2-C / NCS继承了竹叶的自然等级结构。与商业化石墨阳极和其他人工纳米结构碳材料相比，SiO2-C / NCS阳极在200mA G（-1）时显示出586.2 mA Hg（-1）的高锂储存能力，具有令人印象深刻的良好循环稳定性（ 190次循环后294.7 mA hg（-1））和超高的库仑效率接近100％。在从200mA g（-1）到2000mA g（-1）的各种电流密度下160个循环之后，该阳极仍然保持117.4 mA H G（-1）的高放电。这种简单，绿色和可持续的战略将开启新的大道，用于从生物质材料中进行大规模制备和应用纳米结构电极材料。

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  • 来源
    《RSC Advances》 |2016年第3期|共8页
  • 作者

    Xu Huaqiu; Zhang Shuzhen; He Wen; Zhang Xudong; Yang Guihua; Zhang Jing; Shi Xiaoyuan; Wang Lianzhou;

  • 作者单位

    Qilu Univ Technol Inst Mat Sci &

    Engn Jinan 250353 Peoples R China;

    Qilu Univ Technol Inst Mat Sci &

    Engn Jinan 250353 Peoples R China;

    Qilu Univ Technol Inst Mat Sci &

    Engn Jinan 250353 Peoples R China;

    Qilu Univ Technol Inst Mat Sci &

    Engn Jinan 250353 Peoples R China;

    Qilu Univ Technol Minist Educ Key Lab Pulp &

    Paper Sci &

    Technol Jinan 250353 Peoples R China;

    Shandong Taipeng Environm Protect Mat Co Ltd Jinan Shandong Peoples R China;

    Shandong Taipeng Environm Protect Mat Co Ltd Jinan Shandong Peoples R China;

    Univ Queensland Sch Chem Engn Nanomat Ctr Brisbane Qld 4072 Australia;

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  • 正文语种 eng
  • 中图分类 化学;
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