Journal Article

PUBDB-2025-00231

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png 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

Liang, Y.Extern* ; Zheng, T.Extern* ; Sun, K.Extern* ; Xu, Z.Extern* ; Guan, T.Extern* ; Apfelbeck, F. A. C.Extern* ; Ding, P.Extern* ; Sharp, I. D.Extern*XFEL.EU* ; Cheng, Y. ; Schwartzkopf, M.DESY* ; Roth, S. V.XFEL.EU*DESY* ; Müller-Buschbaum, P. (Corresponding author)Extern*

2024
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsami.4c01661  doi:10.3204/PUBDB-2025-00231

Abstract: 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$^+$ 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$^+$ diffusion mechanism, which is essential for developing highly transferable and interface-stable PCE-based LMBs

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)
3. Sustainable Materials (FS-SMA)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. DFG project G:(GEPRIS)390776260 - EXC 2089: e-conversion (390776260) (390776260)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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