• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Graphene-encapsulated fe_3O_4 nanoparticles with 3d laminated structure as superior anode in lithium ion batteries
【24h】

Graphene-encapsulated fe_3O_4 nanoparticles with 3d laminated structure as superior anode in lithium ion batteries

机译：石墨烯包裹的具有3d层状结构的fe_3O_4纳米粒子作为锂离子电池的优越阳极

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

Fe_3O_4-graphene composites with three-dimensional laminated structures have been synthesised by a simple in situ hydrothermal method. From field-emission and transmission electron microscopy results, the Fe_3O_4 nanoparticles, around 3-15 nm in size, are highly encapsulated in a graphene nanosheet matrix. The reversible Li-cycling properties of Fe_3O_4-graphene have been evaluated by galvanostatic discharge-charge cycling, cyclic voltammetry and impedance spectroscopy. Results show that the Fe_3O_4-graphene nanocomposite with a graphene content of 38.0wt% exhibits a stable capacity of about 650mAhag~(-1) with no noticeable fading for up to 100 cycles in the voltage range of 0.0-3.0V. The superior performance of Fe_3O _4-graphene is clearly established by comparison of the results with those from bare Fe_3O_4. The graphene nanosheets in the composite materials could act not only as lithium storage active materials, but also as an electronically conductive matrix to improve the electrochemical performance of Fe_3O_4.
机译：通过简单的原位水热法合成了具有三维层状结构的Fe_3O_4-石墨烯复合材料。根据场发射和透射电子显微镜的结果，Fe_3O_4纳米粒子的大小约为3-15 nm，被高度封装在石墨烯纳米片基质中。 Fe_3O_4-石墨烯的可逆Li-循环性质已通过恒电流放电-充电循环，循环伏安法和阻抗谱进行了评估。结果表明，石墨烯含量为38.0wt％的Fe_3O_4-石墨烯纳米复合材料表现出约650mAhag〜（-1）的稳定容量，在0.0-3.0V的电压范围内，在长达100个循环中没有明显的褪色。通过将结果与来自裸Fe_3O_4的结果进行比较，可以清楚地确定Fe_3O_4-石墨烯的优越性能。复合材料中的石墨烯纳米片不仅可以充当锂存储活性材料，而且还可以作为导电基质来改善Fe_3O_4的电化学性能。

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