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首页> 外文期刊>RSC Advances >Sonochemical preparation of a ytterbium oxide/reduced graphene oxide nanocomposite for supercapacitors with enhanced capacitive performance
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Sonochemical preparation of a ytterbium oxide/reduced graphene oxide nanocomposite for supercapacitors with enhanced capacitive performance

机译：具有增强的电容性能的超级电容器的氧化镱/氧化石墨烯氧化物纳米复合材料的多种子胞化妆品

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Decoration of graphene with different nanostructures can result in fundamental advancements in versatile technologies, especially in the fast growing fields of catalysts, sensors and energy storage. In this study, we have synthesized ytterbia (Yb _(2) O _(3) ) nanoparticles through a facile sonochemical process. These nanoparticles have been anchored on the surface of reduced graphene oxide (RGO) via a self-assembly approach. We investigated the supercapacitive behavior of the nanocomposites as electrode materials with cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. These nanocomposites exhibit a specific capacitance of 240 F g ~(?1) in 0.5 M Na _(2) SO _(4) electrolyte at a scan rate of 2 mV s ~(?1) . Additionally, the specific capacitance of the nanocomposite electrode is 222 F g ~(?1) at the current density of 1 A g ~(?1) in the galvanostatic charge–discharge measurements. These excellent electrochemical performances can stem from the synergism between the properties of Yb _(2) O _(3) nanoparticles and RGO sheets, high charge mobility of them and good flexibility of the graphene sheets. Furthermore, the nanocomposite electrode presents excellent cycling durability with 96.5% specific capacitance restored after 4000 cycles. Our present work introduces a novel procedure to fabricate Yb _(2) O _(3) /RGO nanocomposites as a promising candidate in high performance energy applications.
机译：具有不同纳米结构的石墨烯的装饰可以导致多功能技术的基本进步，特别是在催化剂，传感器和储能的快速生长领域。在这项研究中，我们通过轻松的儿童化学方法合成了Ytterbia（Yb _（2）O _（3））纳米颗粒。这些纳米颗粒通过自组装方法锚固在氧化石墨烯（RGO）的表面上。我们研究了纳米复合材料的超级电容性行为作为具有循环伏安法，电镀电荷 - 放电和电化学阻抗光谱技术的电极材料。这些纳米复合材料在0.5MA〜（2）所以的240 f g〜（α1）的比电容以2mV S〜（α1）的扫描速率为0.5M na _（2）所以_（4）电解质。另外，纳米复合电极的特定电容在电流电荷放电测量中的电流密度为1Ag〜（α1）的电流密度为222fg〜1）。这些优异的电化学性能可以源于YB _（2）O _（3）纳米颗粒和RGO片材的性质之间的协同作用，它们的高电荷迁移率和石墨烯片的良好柔韧性。此外，纳米复合电极呈现出优异的循环耐久性，在4000次循环后恢复96.5％的特定电容。我们现在的作品介绍了一种新颖的方法，用于制造Yb _（2）O _（3）/ rgo纳米复合材料作为高性能能量应用中有希望的候选者。

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