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@ARTICLE{Chayambuka:904163,
      author       = {Chayambuka, Kudakwashe and Mulder, Grietus and Danilov,
                      Dmitri and Notten, Peter H. L.},
      title        = {{D}etermination of state-of-charge dependent diffusion
                      coefficients and kinetic rate constants of phase changing
                      electrode materials using physics-based models},
      journal      = {Journal of power sources advances},
      volume       = {9},
      issn         = {2666-2485},
      address      = {[Amsterdam]},
      publisher    = {Elsevier ScienceDirect},
      reportid     = {FZJ-2021-05733},
      pages        = {100056 -},
      year         = {2021},
      abstract     = {The simplified gravimetric intermittent titration technique
                      (GITT) model, which was first proposed by Weppner and
                      Huggins in 1977, remains a popular method to determine the
                      solid-state diffusion coefficient () and the electrochemical
                      kinetic rate constant (). This is despite the model having
                      been developed on the premise of a single-slab electrode and
                      other gross simplification which are not applicable to
                      modern-day porous battery electrodes. Recently however, more
                      realistic and conceptually descriptive models have emerged,
                      which make use of the increased availability of
                      computational power. Chief among them is the P2D model
                      developed by Newman et al., which has been validated for
                      various porous battery electrodes. Herein, a P2D GITT model
                      is presented and coupled with grid search optimization to
                      determine state-of-charge (SOC) dependent and parameters for
                      a sodium-ion battery (SIB) cathode. Using this approach,
                      experimental GITT steps could be well fitted and thus
                      validated at different SOC points. This work demonstrates
                      the first usage of the P2D GITT model coupled with
                      optimization as an analytical method to derive and validate
                      physically meaningful parameters. The accurate knowledge of
                      and as a function of the SOC gives further insight into the
                      SIB intercalation dynamics and rate capability.},
      cin          = {IEK-9},
      ddc          = {621.3},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1223},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000662271100002},
      doi          = {10.1016/j.powera.2021.100056},
      url          = {https://juser.fz-juelich.de/record/904163},
}