Journal Article

FZJ-2024-05581

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Synergistic Enhancement of Mechanical and Electrochemical Properties in Grafted Polymer/Oxide Hybrid Electrolytes

Scharf, F.FZJ* ; Krude, A.FZJ* ; Lennartz, P.FZJ* ; Clausnitzer, M. ; Shukla, G. ; Buchheit, A.FZJ* ; Kempe, F. ; Diddens, D.FZJ* ; Glomb, P.FZJ* ; Mitchell, M. M.FZJ* ; Danner, T. ; Heuer, A.FZJ* ; Latz, A. ; Winter, M.FZJ* ; Brunklaus, G.FZJ*

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/smll.202404537  doi:10.34734/FZJ-2024-05581

Abstract: Lithium metal batteries operated with high voltage cathodes are predestined for the realization of high energy storage systems, where solid polymer electrolytes offer a possibility to improve battery safety. Al2O3_PCL is introduced as promising hybrid electrolyte made from polycaprolactone (PCL) and Al2O3 nanoparticles that can be prepared in a one-pot synthesis as a random mixture of linear PCL and PCL-grafted Al2O3. Upon grafting, synergistic effects of mechanical stability and ionic conductivity are achieved. Due to the mechanical stability, manufacture of PCL-based membranes with a thickness of 50 µm is feasible, yielding an ionic conductivity of 5·10−5 S cm−1 at 60 °C. The membrane exhibits an impressive performance of Li deposition in symmetric Li||Li cells, operating for 1200 h at a constant and low overvoltage of 54 mV and a current density of 0.2 mA cm−2. NMC622 | Al2O3_PCL | Li cells are cycled at rates of up to 1 C, achieving 140 cycles at >80% state of health. The straightforward synthesis and opportunity of upscaling as well as solvent-free polymerization render the Al2O3_PCL hybrid material as rather safe, potentially sustainable and affordable alternative to conventional polymer-based electrolytes.

Note: Zudem unterstützt durch: “FB2-Hybrid” (grant: 13XP0428A), “FB2-TheoDat” (grant: 03XP0435A/E).

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IMD-4)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)
2. FB2-POLY - Zellplattform Polymere (BMBF-13XP0429A) (BMBF-13XP0429A)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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