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@INPROCEEDINGS{Bereck:1021071,
      author       = {Bereck, Franz Philipp and Bartsch, Christian Hippolyt and
                      Jin, Limei and Mertens, Andreas and Scheurer, Christoph and
                      Granwehr, Josef and Eichel, Rüdiger-A.},
      title        = {{U}ncertainty weighted distribution of relaxation time
                      analysis of battery impedance spectra using {G}aussian
                      process regression for noise estimation},
      reportid     = {FZJ-2024-00525},
      year         = {2023},
      abstract     = {A common technique for characterizing electrochemical
                      systems is the combination of electrochemical impedance
                      spectroscopy (EIS) and equivalent circuit modeling (ECM).
                      However, choosing a suitable electrical circuit usually
                      requires a-priori knowledge of the investigated system. By
                      combining ECM with a distribution of relaxation times (DRT)
                      analysis, relevant features found in the impedance data can
                      be distinguished more clearly and, ideally, their number can
                      be determined.Since the data acquired by EIS shows
                      heteroscedastic noise behavior, using uniform weighting in
                      the DRT can result in either under- or overregularization.
                      To account for that, two methods for noise estimation are
                      compared: statistical noise characterization by obtaining
                      multiple EIS spectra of a commercial Lithium-ion coin cell
                      at the same State of Charge (SoC) and Gaussian process
                      regression (GPR) using only a single data set.},
      month         = {Apr},
      date          = {2023-04-27},
      organization  = {Advanced battery power conference,
                       Aachen (Germany), 27 Apr 2023 - 28 Apr
                       2023},
      subtyp        = {Other},
      cin          = {IEK-9},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122) / HAICU
                      (E5430311)},
      pid          = {G:(DE-HGF)POF4-1223 / G:(DE-Juel-1)E5430311},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1021071},
}