Journal Article

FZJ-2018-04898

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Supramolecular Self-Assembly of Methylated Rotaxanes for Solid Polymer Electrolyte Application

Imholt, L.FZJ* ; Dong, D. ; Bedrov, D. ; Cekic-Laskovic, I.FZJ* ; Winter, M. (Corresponding author)FZJ* ; Brunklaus, G. (Corresponding author)FZJ*

2018
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsmacrolett.8b00406

Abstract: Li+-conducting solid polymer electrolytes (SPEs) obtained from supramolecular self-assembly of trimethylated cyclodextrin (TMCD), poly(ethylene oxide) (PEO), and lithium salt are investigated for application in lithium-metal batteries (LMBs) and lithium-ion batteries (LIBs). The considered electrolytes comprise nanochannels for fast lithium-ion transport formed by CD threaded on PEO chains. It is demonstrated that tailored modification of CD beneficially influences the structure and transport properties of solid polymer electrolytes, thereby enabling their application in LMBs. Molecular dynamics (MD) simulation and experimental data reveal that modification of CDs shifts the steady state between lithium ions inside and outside the channels, in this way improving the achievable ionic conductivity. Notably, the designed SPEs facilitated galvanostatic cycling in LMBs at fast charging and discharging rates for more than 200 cycles and high Coulombic efficiency.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2018

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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