• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >GeO_x/Reduced Graphene Oxide Composite as an Anode for Li-Ion Batteries: Enhanced Capacity via Reversible Utilization of Li_2O along with Improved Rate Performance
【24h】

GeO_x/Reduced Graphene Oxide Composite as an Anode for Li-Ion Batteries: Enhanced Capacity via Reversible Utilization of Li_2O along with Improved Rate Performance

机译：GeO_x /还原型氧化石墨烯复合材料作为锂离子电池的阳极：通过可逆利用Li_2O增强容量并提高倍率性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A self-assembled GeO_x/reduced graphene oxide (GeO_x/RGO) composite, where GeOx nanoparticles are grown directly on reduced graphene oxide sheets, is synthesized via a facile one-step reduction approach and studied by X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, electron energy loss spectroscopy elemental mapping, and other techniques. Electrochemical evaluation indicates that incorporation of reduced graphene oxide enhances both the rate capability and reversible capacity of GeO_x, with the latter being due to the RGO enabling reversible utilization of Li_2O. The composite delivers a high reversible capacity of 1600 mAh g~(-1) at a current density of 100 mA g~(-1) and still maintains a capacity of 410 mAh g~(-1) at a high current density of 20 A g~(-1). Owing to the flexible reduced graphene oxide sheets enwrapping the GeO_x particles, the cycling stability of the composite is also improved significantly. To further demonstrate its feasibility in practical applications, the synthesized GeO_x/RGO composite anode is successfully paired with a high voltage LiNi_(0.5)Mn_(1.5)O_4 cathode to form a full cell, which shows good cycling and rate performance.
机译：通过简便的一步还原方法合成了自组装的GeO_x /还原氧化石墨烯（GeO_x / RGO）复合材料，其中GeOx纳米粒子直接在还原的氧化石墨片上生长，并通过X射线衍射，透射电子显微镜，能量色散X射线光谱，电子能量损失光谱元素标测和其他技术。电化学评估表明，掺入还原的氧化石墨烯可增强GeO_x的速率能力和可逆容量，后者归因于RGO可实现Li_2O的可逆利用。该复合材料在100 mA g〜（-1）的电流密度下可提供1600 mAh g〜（-1）的高可逆容量，而在20的高电流密度下仍可保持410 mAh g〜（-1）的容量。 g〜（-1）。由于包裹了GeO_x颗粒的柔性的还原性氧化石墨烯片材，复合材料的循环稳定性也显着提高。为了进一步证明其在实际应用中的可行性，将合成的GeO_x / RGO复合阳极与高压LiNi_（0.5）Mn_（1.5）O_4阴极成功配对，形成一个完整的电池，显示出良好的循环和倍率性能。

著录项

  • 来源
    《Advanced Functional Materials》 |2014年第8期|1059-1066|共8页
  • 作者

    Dongping Lv; Mikhail L. Gordin; Ran Yi; Terrence Xu; Jiangxuan Song; Ying-Bing jiang; Daiwon Choi; Donghai Wang;

  • 作者单位

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

    Center for Micro-Engineered Materials University of New Mexico Albuquerque, NM, 87131, USA;

    Energy and Environment Directorate Pacific Northwest National Laboratory Richland, WA, 99354, USA;

    Department of Mechanical & Nuclear Engineering the Pennsylvania State University University Park, PA, 16802, USA;

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

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