首页> 外文期刊>Advanced energy materials >Ultrafine Copper Nanopalm Tree-Like Framework Decorated with Iron Oxide for Li-Ion Battery Anodes with Exceptional Rate Capability and Cycling Stability
【24h】

Ultrafine Copper Nanopalm Tree-Like Framework Decorated with Iron Oxide for Li-Ion Battery Anodes with Exceptional Rate Capability and Cycling Stability

机译:氧化铁修饰的超细铜纳米棕榈树状框架,用于锂离子电池阳极,具有出色的速率性能和循环稳定性

获取原文
获取原文并翻译 | 示例
           

摘要

Ultrafine copper nanopalm tree-like frameworks conformally decorated with iron oxide (Cu NPF@Fe2O3) are prepared by a facile electrodeposition method utilizing bromine ions as unique anisotropic growth catalysts. The formation mechanism and control over Cu growth are comprehensively investigated under various conditions to provide a guideline for fabricating a Cu nanoarchitecture via electrochemical methods. The optimized Cu NPFs exhibit ultrathin (90 nm) and elongated (2-50 mu m) branches with well-interconnected and entangled features, which result in highly desirable attributes such as a large specific surface area (approximate to 6.97 m(2) g(-1)), free transfer pathway for Li+, and high electrical conductivity. The structural advantages of Cu NPF@Fe2O3 enhance the electrochemical kinetics, providing large reactivity, fast Li+/electron transfer, and structural stability during cycling, that lead to superior electrochemical Li storage performance. The resulting Cu NPF@Fe2O3 demonstrates a high specific capacity (919.5 mAh g(-1) at 0.1 C), long-term stability (801.1 mAh g(-1) at 2 C, approximate to 120% retention after 500 cycles), and outstanding rate capability (630 mAh g(-1) at 10 C).
机译:通过使用溴离子作为独特的各向异性生长催化剂的简便电沉积方法,制备了用氧化铁(Cu NPF @ Fe2O3)共形装饰的超细铜纳米棕榈树状骨架。在各种条件下对Cu的形成机理和对Cu生长的控制进行了全面研究,为通过电化学方法制备Cu纳米结构提供了指导。经过优化的Cu NPF具有超薄(<90 nm)和细长(2-50μm)的分支,具有良好互连和纠缠的特征,从而产生了非常理想的属性,例如较大的比表面积(约6.97 m(2)) g(-1)),Li +的自由转移途径和高电导率。 Cu NPF @ Fe2O3的结构优势可增强电化学动力学,提供较大的反应性,快速的Li + /电子转移以及循环过程中的结构稳定性,从而带来出色的电化学Li储存性能。所得的Cu NPF @ Fe2O3表现出高的比容量(在0.1 C下为919.5 mAh g(-1)),长期稳定性(在2 C下为801.1 mAh g(-1),在500次循环后约120%的保留率),和出色的速率能力(在10 C下为630 mAh g(-1))。

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