Journal Article

FZJ-2021-05301

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single-Ion-Conducting “Polymer-in-Ceramic” Hybrid Electrolyte with an Intertwined NASICON-Type Nanofiber Skeleton

Yu, S. (Corresponding author)FZJ* ; Xu, Q.FZJ* ; Lu, X.FZJ* ; Liu, Z.FZJ* ; Windmüller, A. ; Tsai, C.-L.FZJ* ; Buchheit, A.FZJ* ; Tempel, H.FZJ* ; Kungl, H.FZJ* ; Wiemhöfer, H.-D.FZJ* ; Eichel, R.-A.FZJ*RWTH*

2021
Soc. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/29682  doi:10.1021/acsami.1c17718

Abstract: The fast Li+ transportation of “polymer-in-ceramic” electrolytes is highly dependent on the long-range Li+ migration pathways, which are determined by the structure and chemistry of the electrolytes. Besides, Li dendrite growth may be promoted in the soft polymer region due to the inhomogeneous electric field caused by the commonly low Li+ transference number of the polymer. Herein, a single-ion-conducting polymer electrolyte is infiltrated into intertwined Li1.3Al0.3Ti1.7(PO4)3 (LATP) nanofibers to construct free-standing electrolyte membranes. The composite electrolyte possesses a large electrochemical window exceeding 5 V, a high ionic conductivity of 0.31 mS cm–1 at ambient temperature, and an extraordinary Li+ transference number of 0.94. The hybrid electrolyte in the lithium symmetric cell shows stable Li plating/stripping up to 2000 h under 0.1 mA cm–2 without dendrite formation. The Li|hybrid electrolyte|LiFePO4 battery exhibits enhanced rate capability up to 1 C and a stable cycling performance with an initial discharge capacity of 131.8 mA h g–1 and a retention capacity of 122.7 mA h g–1 after 500 cycles at 0.5 C at ambient temperature. The improved electrochemical performance is attributed to the synergistic effects of the LATP nanofibers and the single-ion-conducting polymer. The fibrous fast ion conductors provide continuous ion transport channels, and the polymer improves the interfacial contact with the electrodes and helps to suppress the Li dendrites.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)
2. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2021

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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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