Moeremans Boaz, Cheng Hsiu-Wei, Merola Claudia, Hu Qingyun, Oezaslan Mehtap, Safari Mohammadhosein, Van Bael Marlies K, Hardy An, Valtiner Markus, Renner Frank Uwe
Institute for Materials Research Hasselt University BE-3590 Diepenbeek Belgium.
Max-Planck Institut für Eisenforschung GmbH 40237 Düsseldorf Germany.
Adv Sci (Weinh). 2019 Jun 14;6(16):1900190. doi: 10.1002/advs.201900190. eCollection 2019 Aug 21.
The interfacial decomposition products forming the so-called solid-electrolyte interphase (SEI) significantly determine the destiny of a Li-ion battery. Ultimate knowledge of its detailed behavior and better control are required for higher rates, longer life-time, and increased safety. Employing an electrochemical surface force apparatus, it is possible to control the growth and to investigate the mechanical properties of an SEI in a lithium-ion battery environment. This new approach is here introduced on a gold model system and reveals a compressible film at all stages of SEI growth. The demonstrated methodology provides a unique tool for analyzing electrochemical battery interfaces, in particular in view of alternative electrolyte formulations and artificial interfaces.
形成所谓固体电解质界面（SEI）的界面分解产物显著决定了锂离子电池的命运。为了实现更高的倍率、更长的使用寿命和更高的安全性，需要深入了解其详细行为并进行更好的控制。利用电化学表面力装置，可以在锂离子电池环境中控制SEI的生长并研究其机械性能。本文在金模型系统上引入了这种新方法，并揭示了SEI生长各个阶段的可压缩膜。所展示的方法为分析电化学电池界面提供了一种独特的工具，特别是考虑到替代电解质配方和人工界面。
