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@ARTICLE{Wang:875384,
      author       = {Wang, Rui and Qian, Guoyu and Liu, Tongchao and Li, Maofan
                      and Liu, Jiajie and Zhang, Bingkai and Zhu, Weiming and Li,
                      Shuankui and Zhao, Wenguang and Yang, Wenyun and Ma, Xiaobai
                      and Fu, Zhendong and Liu, Yuntao and Yang, Jinbo and Jin,
                      Lei and Xiao, Yinguo and Pan, Feng},
      title        = {{T}uning {L}i-enrichment in high-{N}i layered oxide
                      cathodes to optimize electrochemical performance for
                      {L}i-ion battery},
      journal      = {Nano energy},
      volume       = {62},
      issn         = {2211-2855},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-01995},
      pages        = {709 - 717},
      year         = {2019},
      abstract     = {To understand what and how structural properties affect
                      battery performance, and to optimize the structural
                      properties accordingly are of crucial importance to improve
                      the performance of cathode materials for advanced Li-ion
                      batteries. Herein, we investigated the influence of
                      Li-enrichment in Li1+x(Ni0.8Co0.2)1-xO2 transition metal
                      (TM) oxide cathodes, obtained by sintering Ni0.8Co0.2(OH)2
                      precursor with different amount of Li sources. Compared with
                      stoichiometric Li1+x(Ni0.8Co0.2)1-xO2 (i.e. x = 0,
                      Li:TM = 1:1), the improvements of cycling stability and
                      rate performance were observed in material with moderate
                      degree of Li-enrichment with respect to TMs (i.e.
                      x = 0.019, Li:TM = 1.04:1). Further increase in
                      Li:TM ratio up to 1.07 diminishes the electrochemical
                      performance. Multi-scale structural characterizations
                      including neutron diffraction and aberration-corrected
                      transmission electron microscopy measurements show that the
                      Li-enrichment leads to a monotonical increase in both Li/Ni
                      exchange ratio and Li slab space. Based on the results, we
                      argue that, in material with moderate Li-enrichment, larger
                      Li slab space can facilitate the diffusion of Li ions and a
                      certain amount of Li/Ni disordering can also mitigate the
                      contraction of layered structure, therefore resulting in an
                      optimized electrochemical performance; while in material
                      with excessive Li:TM ratio, the diffusion path can be
                      partially blocked due to the presence of redundant Ni ions
                      in Li layers.},
      cin          = {ER-C-1},
      ddc          = {660},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000474636100076},
      doi          = {10.1016/j.nanoen.2019.05.089},
      url          = {https://juser.fz-juelich.de/record/875384},
}