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@ARTICLE{Lennartz:892834,
      author       = {Lennartz, Peter and Borzutzki, Kristina Kerstin and Winter,
                      Martin and Brunklaus, Gunther},
      title        = {{V}iscoelastic polyborosiloxanes as artificial solid
                      electrolyte interphase on lithium metal anodes},
      journal      = {Electrochimica acta},
      volume       = {388},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-02374},
      pages        = {138526},
      year         = {2021},
      abstract     = {Lithium metal is considered as outstanding anode material
                      due to its superior specific capacity and high redox
                      potential, despite that non-uniform lithium deposition and
                      dissolution upon charging and discharging yields formation
                      of reactive high surface area lithium (HSAL) and a brittle,
                      inhomogeneous solid electrolyte interphase (SEI). As
                      counterstrategy, artificial SEIs such as protective polymer
                      layers can be designed to control lithium deposition.
                      Herein, viscoelastic polyborosiloxanes (PBS) with varying
                      degree of cross-linking (maximum storage modulus of 0.4 MPa)
                      are synthesized and coated on lithium metal. Operando 7Li
                      nuclear magnetic resonance spectroscopy illustrates that
                      highly cross-linked PBS facilitates homogenous deposit
                      morphologies, whereas merely cross-linked PBS does not show
                      relevant effects compared to uncoated electrodes. Interphase
                      analysis (impedance spectroscopy and distribution of
                      relaxation times analysis) reveals increased interphase
                      resistances for coated Li electrodes due to limited solvent
                      uptake and provides a more detailed evaluation of resistive
                      contributions from interphases compared to common equivalent
                      circuit modeling. The beneficial effects of highly
                      cross-linked PBS come at expense of higher resistance
                      associated with a lower degree of swelling, hence
                      emphasizing the complexity of Li deposition.},
      cin          = {IEK-12},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {122 - Elektrochemische Energiespeicherung (POF4-122)},
      pid          = {G:(DE-HGF)POF4-122},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000661937600003},
      doi          = {10.1016/j.electacta.2021.138526},
      url          = {https://juser.fz-juelich.de/record/892834},
}