Journal Article

PUBDB-2024-00779

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Deciphering the Origin of Interface‐Induced High Li and Na Ion Conductivity in Nanocomposite Solid Electrolytes Using X‐Ray Raman Spectroscopy

de Kort, L. M.Extern* ; Lazemi, M.Extern*XFEL.EU* ; Longo, A.Extern* ; Gulino, V.Extern* ; Rodenburg, H. P.Extern* ; Blanchard, D.Extern* ; Sahle, C.Extern* ; Sundermann, M.Extern*DESY* ; Gretarsson, H.DESY* ; van der Eerden, A. M. J.Extern* ; Elnaggar, H.Extern* ; de Groot, F. M. F.Extern* ; Ngene, P. (Corresponding author)Extern*

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/aenm.202303381  doi:10.3204/PUBDB-2024-00779

Abstract: Solid-state electrolytes (SSEs) with high ionic conductivities are crucial for safer and high-capacity batteries. Interface effects in nanocomposites of SSEs and insulators can lead to profound increases in conductivity. Understanding the composition of the interface is crucial for tuning the conductivity of composite solid electrolytes. Herein, X-ray Raman Scattering (XRS) spectroscopy is used for the first time to unravel the nature of the interface effects responsible for conductivity enhancements in nanocomposites of complex hydride-based electrolytes (LiBH$_4$, NaBH$_4$, and NaNH$_2$) and oxides. XRS probe of the Li, Na, and B local environments reveals that the interface consists of highly distorted/defected and structurally distinct phase(s) compared to the original compounds. Interestingly, nanocomposites with higher concentrations of the interface compounds exhibit higher conductivities. Clear differences are observed in the interface composition of SiO$_2$- and Al$_2$O$_3$-based nanocomposites, attributed to differences in the reactivity of their surface groups. These results demonstrate that interfacial reactions play a dominant role in conductivity enhancement in composite solid electrolytes. This work showcases the potential of XRS in investigating interface interactions, providing valuable insights into the often complex ion conductor/insulator interfaces, especially for systems containing light elements such as Li, B, and Na present in most SSEs and batteries.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-S (FS-PETRA-S)

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. SMART-X - Study of carrier transport in MAterials by time-Resolved specTroscopy with ultrashort soft X-ray light (860553) (860553)

Experiment(s):

1. PETRA Beamline P01 (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 ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 25 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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