Graphical abstract<'/> All-solid-state flexible microsupercapacitors based on reduced graphene oxide/multi-walled carbon nanotube composite electrodes
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All-solid-state flexible microsupercapacitors based on reduced graphene oxide/multi-walled carbon nanotube composite electrodes

机译:基于还原氧化石墨烯/多壁碳纳米管复合电极的全固态柔性微型超级电容器

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Graphical abstractDisplay OmittedHighlightsThe rGO/MWCNT with interconnected network was obtained by a facile laser treatment.The MSCs can deliver 6.47 mWh cm−3and 88.6% capacitance retention after 104cycles.The MSCs array can be easily adjusted to achieve the demands in applications.AbstractAll-solid-state flexible microsupercapacitors have been intensely investigated in order to meet the rapidly growing demands for portable microelectronic devices. Herein, we demonstrate a facile, readily scalable and cost-effective laser induction process for preparing reduced graphene oxide/multi-walled carbon nanotube composite, which can be used as the interdigital electrodes in microsupercapacitors. The obtained composite exhibits high volumetric capacitance about 49.35 F cm−3, which is nearly 5 times higher than that of the pristine reduced graphene oxide film in aqueous 1.0 M H2SO4solution (measured at a current density of 5 A cm−3in a three-electrode testing). Additionally, an all-solid-state flexible microsupercapacitor employing these composite electrodes with PVA/H3PO4gel electrolyte delivers high volumetric energy density of 6.47 mWh cm−3at 10 mW cm−3under the current density of 20 mA cm−3as well as achieve excellent cycling stability retaining 88.6% of its initial value and outstanding coulombic efficiency after 10,000 cycles. Furthermore, the microsupercapacitors array connected in series/parallel can be easily adjusted to achieve the demands in practical applications. Therefore, this work brings a promising new candidate of prepare technologies for all-solid-state flexible microsupercapacitors as miniaturized power sources used in the portable and wearable electronics.
机译: 图形摘要 < ce:simple-para>省略显示 突出显示 rGO / MWCNT通过轻松的激光处理获得具有互连网络的网络。 < ce:para id =“ par0010” view =“ all”> MSC可以传送6.47 mWhcm cm -3 ,并且在10个 4 循环后,电容保持率为88.6%。 可以轻松调整MSCs阵列,以满足应用程序的需求。 摘要 全部-固态柔性微型超级电容器已经被广泛研究,以满足对便携式微电子设备的快速增长的需求。在本文中,我们演示了一种用于制备还原型氧化石墨烯/多壁碳纳米管复合材料的简便,易扩展且具有成本效益的激光感应工艺,该工艺可用作微型超级电容器中的叉指电极。所获得的复合材料表现出高的体积电容,约为49.35 F cm -3 ,这是在1.0 MH < ce:inf loc =“ post”> 2 SO 4 解决方案(在5 densityA cm -3 在三电极测试中)。此外,采用这些复合电极的PVA / H 3 PO 4 凝胶电解质在10µmW cm − 3 时可提供6.47 mWh cm -3 的高体积能量密度ce:sup>在20 mA cm − 3 的电流密度下也能实现出色的循环稳定性,并保持其初始值的88.6%和10,000次后的出色的库仑效率周期。此外,可以容易地调节串联/并联连接的微型超级电容器阵列,以实现实际应用中的需求。因此,这项工作为全固态柔性微型超级电容器作为便携式和可穿戴电子设备中的微型电源的制备技术带来了新的有希望的候选人。

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  • 来源
    《Applied Surface Science》 |2018年第30期|1228-1236|共9页
  • 作者单位

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    Chongqing Engineering Research Center of New Energy Storage Devices and Applications,College of Materials Science and Engineering, Chongqing University;

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

    State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC);

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

    Reduced graphene oxide; MWCNT; Laser treatment; Microsupercapacitors;

    机译:氧化石墨烯;MWCNT;激光处理;微型超级电容器;

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