Journal Article

FZJ-2020-05001

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Small Groups, Big Impact: Eliminating Li+ Traps in Single-Ion Conducting Polymer Electrolytes

Borzutzki, K. (First author)FZJ* ; Dong, D. ; Wölke, C.FZJ* ; Kruteva, M.FZJ* ; Stellhorn, A.FZJ* ; Winter, M.FZJ* ; Bedrov, D. ; Brunklaus, G. (Corresponding author)FZJ*

2020
Elsevier St. Louis

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Please use a persistent id in citations: http://hdl.handle.net/2128/27380  doi:10.1016/j.isci.2020.101417

Abstract: Single-ion conducting polymer electrolytes exhibit great potential for next-generation high-energy-density Li metal batteries, although the lack of sufficient molecular-scale insights into lithium transport mechanisms and reliable understanding of key correlations often limit the scope of modification and design of new materials. Moreover, the sensitivity to small variations of polymer chemical structures (e.g., selection of specific linkages or chemical groups) is often overlooked as potential design parameter. In this study, combined molecular dynamics simulations and experimental investigations reveal molecular-scale correlations among variations in polymer structures and Li+ transport capabilities. Based on polyamide-based single-ion conducting quasi-solid polymer electrolytes, it is demonstrated that small modifications of the polymer backbone significantly enhance the Li+ transport while governing the resulting membrane morphology. Based on the obtained insights, tailored materials with significantly improved ionic conductivity and excellent electrochemical performance are achieved and their applicability in LFP||Li and NMC||Li cells is successfully demonstrated.

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Contributing Institute(s):

1. Neutronenstreuung (JCNS-1)
2. Neutronenstreuung und biologische Materie (IBI-8)
3. Streumethoden (PGI-4)
4. Streumethoden (JCNS-2)
5. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
2. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)
3. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)

Appears in the scientific report 2021

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Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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