• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced energy materials >Silicon Composite Electrodes with Dynamic Ionic Bonding
【24h】

Silicon Composite Electrodes with Dynamic Ionic Bonding

机译：动态离子键合硅复合电极

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

Silicon (Si) composite electrodes are developed with increased cycle lifetimes and reliability through dynamic ionic bonding between active Si nanoparticles and a polymer binder. Amine groups are covalently attached to Si nanoparticles via surface functionalization. Si composite electrodes are fabricated by combining the Si nanoparticles with a poly(acrylic acid) (PAA) binder. The formation of ionic bonds between amine groups on Si particles and carboxylic acid groups on the PAA binder is characterized by X-ray photoelectron spectroscopy and Raman spectroscopy. Si composite anodes with ionic bonding demonstrate long term cycling stability with capacity retention of 80% at 400 cycles at a current density of 2.1 A g(-1) and good rate capability. The dynamic ionic bonds effectively mitigate the deterioration of electrical interfaces in the composite anodes as suggested by stable impedance over 300 cycles.
机译：通过在活性硅纳米粒子和聚合物粘合剂之间进行动态离子键合，开发出具有更长的循环寿命和可靠性的硅（Si）复合电极。胺基团通过表面官能化共价附于Si纳米颗粒。通过将Si纳米粒子与聚（丙烯酸）（PAA）粘合剂相结合来制造Si复合电极。通过X射线光电子能谱和拉曼光谱表征了Si颗粒上的胺基与PAA粘合剂上的羧酸基之间离子键的形成。具有离子键合的Si复合阳极表现出长期的循环稳定性，在电流密度为2.1 A g（-1）时具有400次循环时80％的容量保持率和良好的倍率能力。动态离子键可有效缓解复合阳极中电界面的劣化，如300个周期内的稳定阻抗所暗示的那样。

著录项

  • 来源
    《Advanced energy materials》 |2017年第17期|1700045.1-1700045.7|共7页
  • 作者

    Kang Sen; Yang Ke; White Scott R.; Sottos Nancy R.;

  • 作者单位

    Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA|Univ Illinois, Mat Sci & Engn, Champaign, IL 61801 USA;

    Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA|Univ Illinois, Mat Sci & Engn, Champaign, IL 61801 USA;

    Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA|Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA;

    Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA|Univ Illinois, Mat Sci & Engn, Champaign, IL 61801 USA;

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

    ionic bonding; Li-ion batteries; restoration of electrical interfaces; Si composite anodes;

    机译：离子键合;锂离子电池;电接口恢复;硅复合阳极;

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