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@ARTICLE{Lin:887945,
      author       = {Lin, Jingjing and Korte, Carsten},
      title        = {{I}nfluence of the acid–base stoichiometry and residual
                      water on the transport mechanism in a
                      highly-{B}rønsted-acidic proton-conducting ionic liquid},
      journal      = {RSC Advances},
      volume       = {10},
      number       = {69},
      issn         = {2046-2069},
      address      = {London},
      publisher    = {RSC Publishing},
      reportid     = {FZJ-2020-04537},
      pages        = {42596 - 42604},
      year         = {2020},
      abstract     = {In this study, Brønsted-acidic proton conducting ionic
                      liquids are considered as potential new electrolytes for
                      polymer membrane fuel cells with operating temperatures
                      above 100 °C. N-Methyltaurine and trifluoromethanesulfonic
                      acid (TfOH) were mixed at various stoichiometric ratios in
                      order to investigate the influence of an acid or base
                      excess. The proton conductivity and self-diffusion of the
                      “neat” and with 6 $wt\%$ water samples were investigated
                      by following electrochemical and NMR methods. The
                      composition change in the complete species and the relative
                      proton transport mechanism based on the NMR results are
                      discussed in detail. During fuel cell operation, the
                      presence of significant amounts of residual water is
                      unavoidable. In PEFC electrolytes, the predominating proton
                      transfer process depends on the cooperative mechanism, when
                      PILs are fixed on the polymer matrix within the membrane.
                      Due to the comparable acidity of the cation [2-Sema]+ and
                      the hydroxonium cation, with excess N-methyltaurine or H2O
                      in the compositions, fast proton exchange reactions between
                      the protonated [2-Sema]+ cation, N-methyltaurine and H2O can
                      be envisaged. Thus, an increasing ratio of cooperative
                      proton transport could be observed. Therefore, for polymer
                      membrane fuel cells operating at elevated temperatures, the
                      highly acidic PILs with excess bases are promising
                      candidates for future use as electrolytes.},
      cin          = {IEK-14},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000592897600063},
      doi          = {10.1039/D0RA08969A},
      url          = {https://juser.fz-juelich.de/record/887945},
}