Impact of Lithium-Ion Coordination on Lithium Electrodeposition

扫码查看

原文链接

万方数据
维普

外文摘要：The lithium dendrite and parasitic reactions are two major challenges for lithium(Li)metal anode—the most promising anode materials for high-energy-density batteries.In this work,both the dendrite and parasitic reactions that occurred between the liquid electrolyte and Li-metal anode could be largely inhibited by regulating the Li+-solvation structure.The saturated Li+-solvation species exist in commonly used LiPF6 liquid electrolyte that needs extra energy to desolvation during Li-electrodeposition.Partial solvation induced high-energy state Li-ions would be more energy favorable during the electron-reduction process,dominating the competition with solvent reduction reactions.The Li-symmetric cells that are cycling at higher temperatures show better performance;the cycled lithium metal anode with metallic lustre and the dendrite-free surface is observed.Theoretical calculation and experimental measurements reveal the existence of high-energy state Li+-solvates species,and their concentration increases with temperature.This study provides insight into the Li+-solvation structure and its electrodeposition characteristics.

外文关键词：

Li+-solvateslithium dendrite-freelithium metal anodemolecular dynamicsparasitic reactions

作者：

Li Sheng、Yanzhou Wu、Jiekang Tian、Li Wang、Jianlong Wang、Yaping Tang、Hong Xu、Xiangming He

展开 >

作者单位：

Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China

School of Pharmaceutical Sciences,Tsinghua University,Beijing 100084,China

Center of Pharmaceutical Technology,Tsinghua University,Beijing 100084,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMinistry of Science and Technology of ChinaMinistry of Science and Technology of ChinaWork Plan for Research Projects under the Clean Vehicles Consortium at U.S.and China-Clean Energy Research CenterWork Plan for Research Projects under the Clean Vehicles Consortium at U.S.and China-Clean Energy Research Centerthank Tsinghua University-Zhangjiagang Joint Institute for Hydrogen Energy and Lithium Ion Battery Technology

项目编号：

52073161U15642052019YFE01002002019YFA0705703CERC-CVC2.02016-2020

出版年：

2023

DOI：

10.1002/eem2.12266

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(1)

参考文献量46