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Fluorinated polysulfonamide based single ion conducting room temperature applicable gel-type polymer electrolytes for lithium ion batteries

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Abstract

Single ion conducting polymer electrolytes (SIPEs) comprised of homopolymers containing a polysulfonylamide segment in the polymer backbone are presented. The polymer structure contains –C(CF3)2 functional groups that due to better solubility allow for effective lithiation, yielding well-defined materials. An optimized polymer electrolyte membrane was fabricated as a 3 : 1 blend of single ion conducting polymer and PVdF-HFP, which exhibits a high ionic conductivity of 0.52 mS cm−1 and an impressive lithium ion transference number of 0.9, as well as a 7Li self-diffusion coefficient of 4.6 × 10−11 m2 s−1 at 20 °C. The presented polymer electrolyte has superior oxidative stability and long-term stability against lithium metal, thus facilitating operation in LiNi1/3Mn1/3CO1/3O2 (NMC111)/lithium metal cells at 20 °C and 60 °C, thereby clearly demonstrating the application potential of this class of materials.

Graphical abstract: Fluorinated polysulfonamide based single ion conducting room temperature applicable gel-type polymer electrolytes for lithium ion batteries

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Publication details

The article was received on 29 Aug 2018, accepted on 23 Oct 2018 and first published on 04 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA08391F
Citation: J. Mater. Chem. A, 2019, Advance Article
  • Open access: Creative Commons BY license
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    Fluorinated polysulfonamide based single ion conducting room temperature applicable gel-type polymer electrolytes for lithium ion batteries

    K. Borzutzki, J. Thienenkamp, M. Diehl, M. Winter and G. Brunklaus, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA08391F

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