• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>ACS Omega >Design of Pt-Supported 1D and 3D Multilayer Graphene-BasedStructural Composite Electrodes with Controlled Morphology by Core–ShellElectrospinning/Electrospraying
【2h】

Design of Pt-Supported 1D and 3D Multilayer Graphene-BasedStructural Composite Electrodes with Controlled Morphology by Core–ShellElectrospinning/Electrospraying

机译：基于Pt的1D和3D多层石墨烯多层设计核壳结构可控形态的结构复合电极静电纺/电祈祷

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Platinum (Pt)-decorated graphene-based carbon composite electrodes with controlled dimensionality were successfully fabricated via core–shell electrospinning/electrospraying techniques. In this process, multilayer graphene sheets were converted into the three different forms, fiber, sphere, and foam, by tailoring the polymer concentration, molecular weight of polymer, and applied voltage. As polymer concentration increased, continuous fibers were produced, whereas decreasing polymer concentration caused the formation of graphene-based foam. In addition, the reduction in polymer molecular weight in electrospun solution led to the creation of three-dimensional (3D) spherical structures. In this work, graphene-based foam was produced for the first time by utilizing core–shell electrospraying technology instead of available chemical vapor deposition techniques. The effect of morphologies and dimensions of carbonized graphene-based carbon electrodes on its electrochemical behavior was investigated by cyclic voltammetry and galvanostatic charge–discharge methods. Among the three different electrodes, Pt-supported 3D graphene-basedspheres showed the highest specific capacitance of 118 F/g at a scanrate of 1 mV/s owing to the homogeneous decoration of Pt particleswith a small diameter of 4 nm on the surface. After 1000 cycles ofcharging–discharging, Pt-decorated graphene-based structuresshowed high cyclic stability and retention of capacitance, indicatingtheir potential as high-performance electrodes for energy storagedevices.
机译：通过核-壳电纺丝/电喷雾技术成功地制造了具有受控尺寸的铂（Pt）装饰的石墨烯基碳复合电极。在此过程中，通过调整聚合物浓度，聚合物分子量和施加电压，可以将多层石墨烯片转变为三种不同形式，即纤维，球体和泡沫。随着聚合物浓度的增加，产生了连续纤维，而降低的聚合物浓度导致了石墨烯基泡沫的形成。另外，电纺溶液中聚合物分子量的降低导致三维（3D）球形结构的产生。在这项工作中，首次利用核-壳电喷雾技术代替了现有的化学气相沉积技术生产了石墨烯基泡沫。通过循环伏安法和恒电流充放电方法研究了碳化石墨烯基碳电极的形貌和尺寸对其电化学行为的影响。在三种不同的电极中，Pt支撑的3D石墨烯基球在扫描时显示出最高的比电容118 F / g由于Pt颗粒的均质装饰，速度为1 mV / s表面直径为4 nm的小孔。经过1000次循环充放电，Pt装饰的石墨烯基结构显示出高的循环稳定性和电容保持率，表明它们作为储能高性能电极的潜力设备。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号