...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy & environmental science >Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid–electrolyte interphase modification
【24h】

Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid–electrolyte interphase modification

机译：通过阳离子聚合物膜诱导的固体电解质相互作用揭示锂枝晶抑制的机制

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

It is crucial to suppress lithium dendrite formation in lithium metal batteries. Formation of a good solid-electrolyte interphase (SEI) has been considered to be effective in limiting lithium dendrite growth. However, how the SEI may be modified during lithium deposition is hard to resolve due to challenges inin situinvestigation of the SEI with fine details. We report anin situstudy that uncovers the lithium dendrite suppression mechanism arising from SEI modification by a poly(diallyldimethylammonium chloride) (PDDA) cationic polymer film, using electrochemical liquid cell transmission electron microscopy (TEM). Lithium nanogranules are obtained in the presence of the polymer film. Chemical mapping of the deposits provides remarkable details of the SEI on individual nanogranules. It shows that lithium fluorides are uniformly distributed within the inner SEI layer of individual lithium nanogranules, arising from the instantaneous reaction of the deposited lithium with PF(6)(-)ions accumulated by the cationic polymer film, and thus the dendritic growth of lithium is prohibited. The ability to directly measure SEI chemistry at the nanoscale down to the individual nanograinsin situand unveil its correlation with the lithium deposition behavior opens future opportunities to explore unsolved mechanisms in batteries.
机译：在锂金属电池中抑制锂枝晶形成至关重要。形成了良好的固体电解质间（SEI），被认为是限制锂枝晶生长的有效性。然而，由于SEI的挑战，如何在锂沉积期间修改SEI在锂沉积中是难以解决的，因此在细节细节中致癌到SEI的挑战。我们举报了使用电化学液体细胞透射电子显微镜（TEM）通过聚（二烯丙基氯化铵）（PDDA）阳离子聚合物膜来揭示由SEI改性产生的锂二德抑制机制的Anin Steardy。在聚合物膜的存在下获得锂纳米甘油。沉积物的化学映射提供了单个纳米甘油酮的SEI的显着细节。它表明，氟化锂均匀地分布在单个锂纳米甲板的内部SEI层内，由沉积的锂与阳离子聚合物膜积聚的PF（6）（ - ）离子的瞬时反应产生，因此锂的树突生长被禁止。直接测量纳米级化学的能力下降到单个纳米甲蛋白的出席统于其与锂沉积行为的相关性开辟了未来的机会，以探索电池中的未解决机制。

著录项

  • 来源
    《Energy & environmental science》 |2020年第6期|1832-1842|共11页
  • 作者

    Lee Seung-Yong; Shangguan Junyi; Alvarado Judith; Betzler Sophia; Harris Stephen J.; Doeff Marca M.; Zheng Haimei;

  • 作者单位

    Lawrence Berkeley Natl Lab Mat Sci Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Mat Sci Div Berkeley CA 94720 USA|Univ Calif Berkeley Dept Mat Sci & Engn Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA USA;

    Lawrence Berkeley Natl Lab Mat Sci Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Mat Sci Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA USA;

    Lawrence Berkeley Natl Lab Mat Sci Div Berkeley CA 94720 USA|Univ Calif Berkeley Dept Mat Sci & Engn Berkeley CA 94720 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