%0 Journal Article
%A Liang, Yuxin
%A Zheng, Tianle
%A Sun, Kun
%A Xu, Zhuijun
%A Guan, Tianfu
%A Apfelbeck, Fabian A. C.
%A Ding, Pan
%A Sharp, Ian D.
%A Cheng, Yajun
%A Schwartzkopf, Matthias
%A Roth, Stephan V.
%A Müller-Buschbaum, Peter
%T Operando Study Insights into Lithiation/Delithiation Processes in a Poly(ethylene oxide) Electrolyte of All-Solid-State Lithium Batteries by Grazing-Incidence X-ray Scattering
%J ACS applied materials & interfaces
%V 16
%N 26
%@ 1944-8244
%C Washington, DC
%I Soc.
%M PUBDB-2025-00231
%P 33307-33315
%D 2024
%X Poly(ethylene oxide) (PEO)-based composite electrolytes (PCEs) are considered as promising candidates for next-generation lithium-metal batteries (LMBs) due to their high safety, easy fabrication, and good electrochemical stability. Here, we utilize operando grazing-incidence small-angle and wide-angle X-ray scattering to probe the correlation of electrochemically induced changes and the buried morphology and crystalline structure of the PCE. Results show that the two irreversible reactions, PEO-Li<sup>+</sup> reduction and TFSI– decomposition, cause changes in the crystalline structure, array orientation, and morphology of the PCE. In addition, the reversible Li plating/stripping process alters the inner morphology, especially the PEO-LiTFSI domain radius and distance between PEO-LiTFSI domains, rather than causing crystalline structure and orientation changes. This work provides a new path to monitor a working battery in real time and to a detailed understanding of the Li<sup>+</sup> diffusion mechanism, which is essential for developing highly transferable and interface-stable PCE-based LMBs
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:38913824
%U <Go to ISI:>//WOS:001253335500001
%R 10.1021/acsami.4c01661
%U https://bib-pubdb1.desy.de/record/622179