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@ARTICLE{Kasnatscheew:851115,
      author       = {Kasnatscheew, Johannes and Evertz, Marco and Streipert,
                      Benjamin and Wagner, Ralf and Nowak, Sascha and
                      Cekic-Laskovic, Isidora and Winter, Martin},
      title        = {{I}mproving cycle life of layered lithium transition metal
                      oxide ({L}i{MO}2 ) based positive electrodes for {L}i ion
                      batteries by smart selection of the electrochemical charge
                      conditions},
      journal      = {Journal of power sources},
      volume       = {359},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-04817},
      pages        = {458 - 467},
      year         = {2017},
      abstract     = {Increasing the specific energy of a lithium ion battery and
                      maintaining its cycle life is a predominant goal and major
                      challenge for electrochemical energy storage applications.
                      Focusing on the positive electrode as the specific energy
                      bottleneck, cycle life characteristics of promising layered
                      oxide type active materials (LiMO2) has been thoroughly
                      investigated. Comparing the variety of LiMO2 compositions,
                      it could be shown that the “Ni-rich” (Ni ≥ $60\%$ for
                      M in LiMO2) electrodes expectably revealed best performance
                      compromises between specific energy and cycle life at 20
                      °C, but only LiNi0.6Mn0.2Co0.2O2 (NMC622) could also
                      maintain sufficient cycle performance at elevated
                      temperatures. Focusing on NMC622, it could be demonstrated
                      that the applied electrochemical conditions (charge
                      capacity, delithiation amount) in the formation cycles
                      significantly influence the subsequent cycling performance.
                      Moreover, the insignificant transition metal dissolution,
                      demonstrated by means of total X-ray fluorescence (TXRF)
                      technique, and unchanged lithiation degree in the discharged
                      state, determined by the measurement of the Li+ content by
                      means of the inductively coupled plasma optical emission
                      spectroscopy (ICP-OES) technique, pointed to a delithiation
                      (charge) hindrance capacity fade mechanism. Considering
                      these insights, thoughtful modifications of the
                      electrochemical charge conditions could significantly
                      prolong the cycle life.},
      cin          = {IEK-12},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000403548200057},
      doi          = {10.1016/j.jpowsour.2017.05.092},
      url          = {https://juser.fz-juelich.de/record/851115},
}