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@ARTICLE{Knne:909243,
      author       = {Künne, Sven and Püttmann, Frederik and Linhorst, Max and
                      Moerschbacher, Bruno M. and Winter, Martin and Li, Jie and
                      Placke, Tobias},
      title        = {{C}omparative {S}tudy on {C}hitosans as {G}reen {B}inder
                      {M}aterials for {L}i{M}n 2 {O} 4 {P}ositive {E}lectrodes in
                      {L}ithium {I}on {B}atteries},
      journal      = {ChemElectroChem},
      volume       = {9},
      number       = {17},
      issn         = {2196-0216},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2022-03081},
      pages        = {e202200600},
      year         = {2022},
      abstract     = {The increasing demand for lithium ion batteries
                      consequently involves research on environmentally benign
                      materials and processing routes. Environmentally friendly
                      cobalt-free, and fluorine-free electrodes processed without
                      organic solvents were targeted as this approach combines
                      high work safety and sustainability with good
                      electrochemical performance. In this study, chitosan-based
                      biopolymers were synthesized and systematically investigated
                      for the first time as “green” binders for positive
                      electrodes utilizing LiMn2O4 (LMO). In particular, chitosans
                      with different specifically designed low and high degrees of
                      polymerization (DP), each with comparable degree of
                      acetylation (DA), revealed insights into the impact on the
                      mechanical and electrochemical performance of LMO positive
                      electrodes. Herein, low DP chitosan provided twice the
                      adhesion strength compared to the state-of-the-art binder
                      polyvinylidene difluoride (PVdF) in LMO electrodes, thus,
                      showing the opportunity to reduce the binder content and
                      increase the specific energy. Electrodes with $DA<16 \%$
                      chitosan-based binder could deliver higher discharge
                      capacities than cathodes using PVdF or chitosans with
                      $DA>16 \%$ in LMO||Li metal cells. Cross-linking of
                      chitosans with citric acid (CA) was demonstrated to
                      significantly increase the discharge capacity up to
                      80 mAh g−1 at 10 C charge/discharge rate.},
      cin          = {IEK-12},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000839504800001},
      doi          = {10.1002/celc.202200600},
      url          = {https://juser.fz-juelich.de/record/909243},
}