%0 Journal Article
%A Scharf, Felix
%A Krude, Annalena
%A Lennartz, Peter
%A Clausnitzer, Moritz
%A Shukla, Gourav
%A Buchheit, Annika
%A Kempe, Fabian
%A Diddens, Diddo
%A Glomb, Pascal
%A Mitchell, Melanie M.
%A Danner, Timo
%A Heuer, Andreas
%A Latz, Arnulf
%A Winter, Martin
%A Brunklaus, Gunther
%T Synergistic Enhancement of Mechanical and Electrochemical Properties in Grafted Polymer/Oxide Hybrid Electrolytes
%J Small
%V 20
%N 47
%@ 1613-6810
%C Weinheim
%I Wiley-VCH
%M FZJ-2024-05581
%P 2404537
%D 2024
%Z Zudem unterstützt durch: “FB2-Hybrid” (grant: 13XP0428A), “FB2-TheoDat” (grant: 03XP0435A/E).
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 39185805
%U <Go to ISI:>//WOS:001298262500001
%R 10.1002/smll.202404537
%U https://juser.fz-juelich.de/record/1031177