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首页> 外文期刊>RSC Advances >Prussian blue derived iron oxide nanoparticles wrapped in graphene oxide sheets for electrochemical supercapacitors
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Prussian blue derived iron oxide nanoparticles wrapped in graphene oxide sheets for electrochemical supercapacitors

机译：普鲁士蓝衍生的氧化铁纳米颗粒包裹在石墨烯氧化物片中，用于电化学超级电容器

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摘要

Hybrid materials have shown promising potential for energy storage applications, such as supercapacitors due to the combined properties or advantages of two (or more) individual constituents. In this work, we report the fabrication of a new composite which combines graphene oxide (GO) sheets with Prussian blue (PB) nanoparticles, which act as a precursor for iron oxide (IO). The GO/PB composite precursors with different GO : PB ratios can be successfully converted into nanoporous GO/IO hybrid composites through a thermal treatment in air at 400 degrees C. In the resulting GO/IO composites, the GO sheets are efficiently spaced due to the insertion of IO layers. Interestingly, the GO/IO hybrid (GO : PB ratio = 25 : 75) exhibits a higher surface area of 120 m(2) g(-1) compared to pure GO (34.9 m(2) g(-1)) and IO (93.1 m(2) g(-1)) samples. When employed as a supercapacitor electrode, the GO/IO hybrid (prepared from GO : PB = 75 : 25) showed a higher specific capacitance of 91 F g(-1) at a scan rate of 20 mV s(-1), compared to pure GO (81 F g(-1)) and pure IO (47 F g(-1)). The enhanced electrochemical performance of the GO/IO hybrid electrode may be attributed to the insertion of IO nanoparticles in between the GO layers which creates a well-spaced electrical transportation path for electrolytes and ions, whilst also enabling easy access for the electrolytes to the whole electrode surface. Furthermore, the presence of GO in the GO/IO hybrid composite helps to lower the resistivity of IO and increase the specific capacitance value of the hybrid, as a result of the improved conductivity.
机译：混合材料显示出能量储存应用的有希望的潜力，例如由于两个（或更多）个体成分的组合性或优点，例如超级电容器。在这项工作中，我们报告了一种新的复合材料的制造，该组合物将石墨烯（GO）片与普鲁士蓝（PB）纳米颗粒相结合，其用作氧化铁（IO）的前体。具有不同GO的GO / PB复合前体：PB比率可以通过在400摄氏度的空气中的热处理成功转换为纳米电孔GO / IO混合复合材料。在所得到的GO / IO复合材料中，GO纸张由于缺点而有效地间隔开插入IO层。有趣的是，与纯GO（34.9M（2）G（-1））相比，GO / IO混合（GO：PB比率= 25：75）表现出更高的表面积为120m（2 )g（-1）（34.9μg））和IO（93.1 m（2）g（-1））样本。当用作超级电容器电极时，GO / IO杂交（GO：PB = 75：25制备），比较的扫描速率为20 mV S（-1）的扫描速率，显示出较高的91f g（-1）的比电容。纯（81 f g（-1））和纯IO（47 f g（-1））。 Go / IO混合电极的增强电化学性能可以归因于在GO层之间插入IO纳米颗粒，其为电解质和离子产生良好间隔的电气输送路径，同时也能够轻松地进入整体电解质电极表面。此外，由于改善的电导率，进入Go / IO混合复合材料的存在有助于降低IO的电阻率并增加混合动力的特定电容值。

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  • 来源
    《RSC Advances》 |2017年第54期|共6页
  • 作者

    Tanaka Shunsuke; Salunkhe Rahul R.; Kaneti Yusuf Valentino; Malgras Victor; Alshehri Saad M.; Ahamad Tansir; Zakaria Mohamed B.; Dou Shi Xue; Yamauchi Yusuke; Hossain Md Shahriar A.;

  • 作者单位

    Univ Wollongong AIIM ISEM Squires Way North Wollongong NSW 2500 Australia;

    NIMS Int Ctr Mat Nanoarchitecton MANA 1-1 Namiki Tsukuba Ibaraki 3050044 Japan;

    NIMS Int Ctr Mat Nanoarchitecton MANA 1-1 Namiki Tsukuba Ibaraki 3050044 Japan;

    NIMS Int Ctr Mat Nanoarchitecton MANA 1-1 Namiki Tsukuba Ibaraki 3050044 Japan;

    King Saud Univ Coll Sci Dept Chem Riyadh 11451 Saudi Arabia;

    King Saud Univ Coll Sci Dept Chem Riyadh 11451 Saudi Arabia;

    NIMS Int Ctr Mat Nanoarchitecton MANA 1-1 Namiki Tsukuba Ibaraki 3050044 Japan;

    Univ Wollongong AIIM ISEM Squires Way North Wollongong NSW 2500 Australia;

    Univ Wollongong AIIM ISEM Squires Way North Wollongong NSW 2500 Australia;

    Univ Wollongong AIIM ISEM Squires Way North Wollongong NSW 2500 Australia;

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  • 正文语种 eng
  • 中图分类 化学;
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