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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >High-performance supercapacitors based on hierarchically porous carbons with a three-dimensional conductive network structure
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High-performance supercapacitors based on hierarchically porous carbons with a three-dimensional conductive network structure

机译：高性能超级电容器，基于具有三维导电网络结构的分层多孔碳

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摘要

Clews of polymer nanobelts (CsPNBs) have the advantages of inexpensive raw materials, simple synthesis and large output. Novel clews of carbon nanobelts (CsCNBs) have been successfully prepared by carbonizing CsPNBs and by KOH activation subsequently. From the optimized process, CsCNBs*4, with a specific surface area of 2291 m(2) g(-1) and a pore volume of up to 1.29 cm(3) g(-1), has been obtained. Fundamentally, the CsCNBs possess a three-dimensional conductive network structure, a hierarchically porous framework, and excellent hydrophilicity, which enable fast ion diffusion through channels and a large enough ion adsorption/desorption surface to improve electrochemical performance of supercapacitors. The product exhibits a high specific capacitance of 327.5 F g(-1) at a current density of 0.5 A g(-1) in a three-electrode system. The results also reveal a high-rate capacitance (72.2% capacitance retention at 500 mV s(-1)) and stable cycling lifetime (95% of initial capacitance after 15000 cycles). Moreover, CsCNBs*4 provides a high energy density of 29.8 W h kg(-1) at a power density of 345.4 W kg(-1) in 1 M tetraethylammonium tetrafluoroborate/acetonitrile (TEABF(4)/AN) electrolyte. These inspiring results imply that this carbon material with a three-dimensional conductive network structure possesses excellent potential for energy storage.
机译：聚合物纳米座（CSPNBS）的线块具有廉价的原材料，合成和大输出的优点。通过随后通过碳化CSPNB和通过KOH活化来成功制备碳纳米核（CSCNBS）的新颖线。从优化的方法中，已经获得了CSCNBS * 4，具有2291m（2）g（-1）的比表面积和高达1.29cm（3 )g（-1）的孔体积。基本上，CSCNB具有三维导电网络结构，分层多孔框架和优异的亲水性，其能够通过通道和大量的离子吸附/解吸表面能够快速离子扩散，以改善超级电容器的电化学性能。该产品在三电极系统中以0.5Ag（-1）的电流密度为327.5fg（-1）的高比电容。结果还揭示了高速率电容（500 mV S（-1）的电容保留72.2％），循环寿命稳定（在15000次循环后的初始电容的95％）。此外，CSCNBS * 4在1M四乙基四氟硼酸盐/乙腈（TeaBF（4）/ An）电解质中，以345.4Wkg（-1）的功率密度提供29.8WH kg（-1）的高能量密度。这些鼓舞人心的结果意味着这种具有三维导电网络结构的碳材料具有优异的能量储存潜力。

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    Zou Jizhao; Tu Wenxuan; Zeng Shao-Zhong; Yao Yuechao; Zhang Qi; Wu Hongliang; Lan Tongbin; Liu Shiyu; Zeng Xierong;

  • 作者单位

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Cranfield Univ Sch Aerosp Transport &

    Mfg Cranfield MK43 0AL Beds England;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

    Shenzhen Univ Shenzhen Key Lab Special Funct Mat Coll Mat Sci &

    Engn Shenzhen 518060 Peoples R China;

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  • 中图分类 化学;无机化学;
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