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@ARTICLE{Daniel:1007030,
      author       = {Daniel, Davis Thomas and Szczuka, Conrad and Jakes, Peter
                      and Eichel, Rüdiger-A. and Granwehr, Josef},
      title        = {{L}aplace inverted pulsed {EPR} relaxation to study contact
                      between active material and carbon black in {L}i-organic
                      battery cathodes},
      journal      = {Physical chemistry, chemical physics},
      volume       = {25},
      number       = {18},
      issn         = {1463-9076},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2023-01949},
      pages        = {12767-12776},
      year         = {2023},
      abstract     = {The addition of conductive additives during electrode
                      fabrication is standard practice to mitigate a low intrinsic
                      electronic conductivity of most cathode materials used in
                      Li-ion batteries. To ensure an optimal conduction pathway,
                      these conductive additives, which generally consist of
                      carbon particles,need to be in good contact with the active
                      compounds. Herein, we demonstrate how a combination of
                      pulsed electron paramagnetic resonance (EPR) relaxometry and
                      inverse Laplace transform(ILT) can be used to study such
                      contact. The investigated system consists of PTMA
                      (poly(2,2,6,6–tetramethylpiperidinyloxy–4–ylmethacrylate))
                      monomer radicals, which is a commonly used redox unit in
                      organic radical batteries (ORB), mixed at different ratios
                      with Super P carbon black (CB) as the conductive additive.
                      Inversion recovery data were acquired to determine
                      longitudinal (T1)relaxation time constant distributions. It
                      was observed that not only the position and relative
                      amplitude, but also the number of relaxation modes varies as
                      the composition of PTMA monomer and CB is changed, thereby
                      justifying the use of ILT instead of fitting with a
                      predetermined number of components. A hypothesis for the
                      origin of different relaxation modes was devised. It
                      suggests that the electrode composition may locally affect
                      the quality of electronic contact between the active
                      material and carbon black},
      cin          = {IEK-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122) / DFG project
                      441255373 - Einblicke in die Dotierungsmechanismen von
                      Polymerelektrolyt / redoxaktiven organischen Radikal Polymer
                      lamellaren Verbundwerkstoffen (441255373) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-1223 / G:(GEPRIS)441255373 /
                      G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {37128728},
      UT           = {WOS:000980069900001},
      doi          = {10.1039/D3CP00378G},
      url          = {https://juser.fz-juelich.de/record/1007030},
}