• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Three-dimensional Cage-like Co3O4 Structure Constructed by Nanowires for Supercapacitor
【24h】

Three-dimensional Cage-like Co3O4 Structure Constructed by Nanowires for Supercapacitor

机译：纳米线构建超级电容器的三维笼状Co 3 O 4 结构

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Three-dimensional (3D) cage-like network architecture is constructed by cobalt oxide nanowires onporous nickel foam (donated as 3D cage-like Co3O4/NF) via a mild hydrothermal method. A series ofmeasurements including X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR),field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM)are used to characterize the crystal structure, component and morphology of the as-prepared sample.The 3D cage-like hierarchical nanostructure increases utilization of active materials and shortenselectrolyte ion transport pathway during the charging/discharging processes, leading to the excellentcapacitive properties of the electrode materials. In a three-electrode system, the resultant electrode-1 exhibits higher specific capacitance of 642 F g and great rate capability (88% capacity retention at 10-1 A g ) in 3 M KOH solution. Importantly, the assembled asymmetric supercapacitor with a potentialwindow of 1.7 V, in which 3D cage-like Co3O4/NF and graphene hydrogel (GH) are served as positive-1 and negative electrode respectively, achieves the energy density of 31 Wh kg along with power-1 density of 854 W kg , indicating a promising potential in the applications of energy storage.
机译：三维（3D）笼状网络结构是通过温和水热法在多孔镍泡沫（捐赠为3D笼状Co3O4 / NF）上形成氧化钴纳米线而构建的。用X射线衍射（XRD），傅立叶变换红外光谱（FT-IR），场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）等一系列手段表征了硅的晶体结构，成分和形态。 3D笼状分层纳米结构在充电/放电过程中增加了活性材料的利用率并缩短了电解质离子的传输路径，从而使电极材料具有出色的电容性能。在三电极系统中，所得电极1在3 M KOH溶液中显示出较高的比电容642 F g，并且具有极高的倍率能力（在10-1 A g时容量保持88％）。重要的是，组装后的电势窗口为1.7 V的非对称超级电容器，其中3D笼状Co3O4 / NF和石墨烯水凝胶（GH）分别用作正电极1和负电极，可实现31 Wh kg的能量密度以及功率-1的密度为854 W kg，表明在储能应用中有广阔的前景。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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