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@ARTICLE{Mitchell:639375,
      author       = {Mitchell, Nicole C. and Thomas, Oliver O. and Meyer,
                      Benjamin G. and Garcia-Fernandez, Mirian and Zhou, Ke-Jin
                      and Grant, Patrick S. and Bruce, Peter G. and Heap, Richard
                      and Sayers, Ruth and House, Robert},
      title        = {{I}nfluence of {I}on {S}ize on {S}tructure and {R}edox
                      {C}hemistry in {N}a‐{R}ich and {L}i‐{R}ich {D}isordered
                      {R}ocksalt {B}attery {C}athodes},
      journal      = {Advanced materials},
      volume       = {37},
      number       = {32},
      issn         = {0935-9648},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PUBDB-2025-04469},
      pages        = {2419878},
      year         = {2025},
      abstract     = {Li-rich disordered rocksalts are promising next-generation
                      cathode materials for Li-ion batteries. Recent reports have
                      shown it is also possible to obtain Na-rich disordered
                      rocksalts, however, it is currently poorly understood how
                      the knowledge of the structural and redox chemistry
                      translates from the Li-rich to the Na-rich analogs. Here,
                      the properties of Li2MnO2F and Na2MnO2F are compared, which
                      have different ion sizes (Li+ = 0.76 vs Na+ = 1.02 Å) but
                      the same disordered rocksalt structure and stoichiometry. It
                      is found that Na2MnO2F exhibits lower voltage Mn- and
                      O-redox couples, opening access to a wider compositional
                      range within the same voltage limits. Furthermore, the
                      intercalation mechanism switches from predominantly
                      single-phase solid solution behavior in Li2MnO2F to a
                      two-phase transition in Na2MnO2F, accompanied by a greater
                      decrease in the average Mn─O/F bond length. Li2MnO2F
                      retains its long-range disordered rocksalt structure
                      throughout the first cycle. In contrast, Na2MnO2F becomes
                      completely amorphous during charge and develops a local
                      structure characteristic of a post-spinel. This
                      amorphization is partially reversible on discharge. The
                      results show how the ion intercalation behavior of
                      disordered rocksalts differs dramatically when changing from
                      Li- to Na-ions and offers routes to control the
                      electrochemical properties of these high-energy-density
                      cathodes.},
      cin          = {DOOR ; HAS-User},
      ddc          = {660},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P02.1-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1002/adma.202419878},
      url          = {https://bib-pubdb1.desy.de/record/639375},
}