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N-doped reduced graphene oxide (rGO) wrapped carbon microfibers as binder-free electrodes for flexible fibre supercapacitors and sodium-ion batteries

机译:N掺杂的石墨烯氧化物(RGO)包裹的碳微纤维作为粘合剂电极,用于柔性纤维超级电容器和钠离子电池

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摘要

In this study, N-doped reduced graphene oxide (rGO) wrapped carbon micro fibres (CFs) were synthesized by one-step high temperature pyrolysis method. Free-standing binder-free electrodes of N-doped rGO on CF were fabricated to apply in extended flexible fibrous supercapacitors and sodium-ion batteries (NIBs). The results showed that the attachment of N-doped graphene onto CF led to high electrochemical capacitance properties. The micro-fibre electrodes showed high performance supercapacitor behaviour of 18.7 F cm(-3) at a current density of 1 A cm(-3) as a flexible solid-state energy storage device. In parallel with the supercapacitance properties, the micro-fibre electrode shows impressive electrochemical performances when evaluated as anode for NIB, delivering a reversible capacity of 400 mAh/g with capacity retention approaching 100% after 100 cycles. The excellent performances are attributed to defects induced by N-doping along with large surface area of hierarchical porous architecture that can facilitate the storage and diffusion of Na+ and prevent the restacking of rGO during cycling. Thus, these N-doped rGO fibrous materials have substantial promise for fabricating extended flexible cable electronics and NIBs with superior strength and performance.
机译:在该研究中,通过一步高温热解法合成了N-掺杂的石墨烯氧化物(RGO)包裹的碳微纤维(CFS)。制造CF上的N掺杂Rgo的独立粘合剂电极,以施加延长的柔性纤维超级电容器和钠离子电池(铌)。结果表明,将N-掺杂的石墨烯连接到CF上的LED对高电化学电容性质。微纤维电极显示出高度高度的超级电容器,其电流密度为1acm(-3),为柔性固态能量存储装置。当与超级电容器平行的平行时,微纤维电极在作为NIB的阳极评估时显示出令人印象深刻的电化学性能,其在100次循环后,通过容量保持的可逆容量为400mAh / g。优异的性能归因于N掺杂沟槽诱导的缺陷以及具有能够促进Na +的存储和扩散的层次多孔架构的大表面积,并防止在循环期间恢复Rgo。因此,这些N掺杂的RGO纤维材料具有卓越的强度和性能的延长柔性电缆电子和尖端的实质性承诺。

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  • 来源
    《Journal of Energy Storage》 |2021年第5期|102453.1-102453.9|共9页
  • 作者单位

    Univ New South Wales Sch Mech & Mfg Engn Sydney NSW 2052 Australia|Univ Sydney Sch Aerosp Mech & Mechatron Engn Sydney NSW 2006 Australia;

    Univ Wollongong ARC Ctr Excellence Electromat Australian Inst Innovat Mat Wollongong NSW 2522 Australia|Univ Wollongong Intelligent Polymer Res Inst Australian Inst Innovat Mat Wollongong NSW 2522 Australia|Univ Technol Sydney Sch Elect & Data Engn Sydney NSW 2007 Australia;

    Univ Sydney Sch Aerosp Mech & Mechatron Engn Sydney NSW 2006 Australia;

    Univ Sydney Sch Chem & Biomol Engn Lab Sustainable Technol Sydney NSW 2006 Australia;

    Univ New South Wales Sch Mech & Mfg Engn Sydney NSW 2052 Australia;

    RMIT Univ Ctr Adv Elect & Sensors Sch Engn Melbourne Vic 3000 Australia;

    Univ Sydney Sch Chem & Biomol Engn Lab Sustainable Technol Sydney NSW 2006 Australia;

    Univ New South Wales Sch Mech & Mfg Engn Sydney NSW 2052 Australia;

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

    Carbon micro fibres; N-doped graphene; Flexible textile electronics; Pyrolysis; Functionalization; Nanomaterials; Na-ion batteries;

    机译:碳微纤维;n掺杂石墨烯;柔性纺织电子;热解;功能化;纳米材料;Na离子电池;

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