期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 8, 页码 4215-4220出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202013271
关键词
anion coordination; cation solvation; electric double layer; lithium protection; solid electrolyte interphase
资金
- Beijing Natural Science Foundation [JQ20004, L182021]
- National Key Research and Development Program [2016YFA0202500]
- National Natural Science Foundation of China [21776019]
The electric double layer (EDL) chemistry at the electrode/electrolyte interface is found to predominantly control the competitive reduction reactions during SEI construction on Li metal anode. Introducing multi-valent cation additives has been validated as a promising strategy to enhance the performance of SEI, shedding new light on the targeted regulation of reactive alkali metal interfaces.
The persistent efforts to reveal the formation and evolution mechanisms of solid electrolyte interphase (SEI) are of fundamental significance for the rational regulation. In this work, through combined theoretical and experimental model investigations, we elucidate that the electric double layer (EDL) chemistry at the electrode/electrolyte interface beyond the thermodynamic stability of electrolyte components predominately controls the competitive reduction reactions during SEI construction on Li metal anode. Specifically, the negatively-charged surface of Li metal will prompt substantial cation enrichment and anion deficiency within the EDL. Necessarily, only the species participating in the solvation shell of cations could be electrostatically accumulated in proximity of Li metal surface and thereafter be preferentially reduced during sustained dynamic cycling. Incorporating multi-valent cation additives to more effectively drag the favorable anionic SEI enablers into EDL is validated as a promising strategy to upgrade the Li protection performance. The conclusions drawn herein afford deeper understandings to bridge the EDL principle, cation solvation, and SEI formation, shedding fresh light on the targeted regulation of reactive alkali metal interfaces.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据