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@ARTICLE{Voronina:894489,
      author       = {Voronina, Natalia and Kim, Hee Jae and Konarov, Aishuak and
                      Yaqoob, Najma and Lee, Kug-Seung and Kaghazchi, Payam and
                      Guillon, Olivier and Myung, Seung-Taek},
      title        = {{E}lectronic {S}tructure {E}ngineering of {H}oneycomb
                      {L}ayered {C}athode {M}aterial for {S}odium‐{I}on
                      {B}atteries},
      journal      = {Advanced energy materials},
      volume       = {11},
      number       = {14},
      issn         = {1614-6840},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-03252},
      pages        = {2003399 -},
      year         = {2021},
      abstract     = {In this work, the rational design of O′3-type
                      Na[Ni2/3−xCoxSb1/3]O2, a solid solution of
                      Na[Ni2/3Sb1/3]O2–Na[Co2/3Sb1/3]O2, is introduced. Because
                      of the difficulty of the Co3+/2+ redox reaction, the
                      electronic structures of Na[Ni2/3−xCoxSb1/3]O2 compounds
                      are engineered to build electroconducting networks in the
                      oxide matrix through electrochemical oxidation of Co2+ to
                      Co3+, after which the formed Co3+ does not participate in
                      the electrochemical reaction but improves the electrical
                      conductivity in the structure. Density functional theory
                      calculations reveal a reduced bandgap energy after the
                      formation of Co3+ during desodiation of
                      Na1−y[Ni2/3−xCoxSb1/3]O2. Using the oxidized Co3+
                      species while improving the electrical conductivity, the
                      Na[Ni2/3−xCoxSb1/3]O2 (x = 1/6) electrode exhibits
                      excellent cyclability for 1000 cycles with $≈72.5\%$
                      capacity retention at 2C (400 mA g−1) and activity even at
                      50C (10 A g−1) in Na cells. Operando X-ray diffraction and
                      ex situ X-ray absorption near-edge structure investigations
                      reveal suppressed lattice variations upon charge and
                      discharge compared with those of Na[Ni2/3Sb1/3]O2 achieved
                      by the presence of the electrochemical-driven Co3+ in the
                      structure. These findings offer a new strategy for the
                      development of cathode materials for sodium-ion batteries,
                      providing important insight into their structural
                      transformations and the electronic nature of advanced
                      cathode materials.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {050},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000620225300001},
      doi          = {10.1002/aenm.202003399},
      url          = {https://juser.fz-juelich.de/record/894489},
}