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@ARTICLE{Ghoshal:639476,
      author       = {Ghoshal, Amit and Thakur, Vikas Singh and Pramanik, Susmita
                      and Mehta, Vanshika and Meena, Sher Singh and Hirsbrunner,
                      Moritz and Kaushik, S. D. and Dan, Tinku and Törnblom,
                      Pontus and Duda, Laurent and Ghosh, Anirudha and Såthe,
                      Conny and Tokushima, Takashi and Ghosh, Subham and Banerjee,
                      Swastika and Maitra, Urmimala},
      title        = {{U}nlocking high performance in a {N}a–{F}e–{M}n–{O}
                      cathode through phase-transition-free cycling},
      journal      = {EES batteries},
      volume       = {1},
      number       = {5},
      issn         = {3033-4071},
      address      = {Washington DC},
      publisher    = {Royal Society of Chemistry},
      reportid     = {PUBDB-2025-04562},
      pages        = {1255 - 1266},
      year         = {2025},
      abstract     = {Fe–Mn-based Na-layered oxide cathodes suffer from severe
                      phase transitions at high states of charge, accompanied by
                      transition metal migration and large-volume collapse. We
                      propose the incorporation of a small amount of Li+ into the
                      transition metal layer to enable phase-transition-free
                      cycling across a wide state-of-charge (SOC) range. In
                      contrast to the previously studied undoped or Li/Mg/Ni doped
                      P2-type Na–Fe–Mn–O cathodes, our
                      P2-Na0.7Li0.127Fe0.127Mn0.746O2 (NLFM) cathode, which has
                      optimized Li, Fe and Mn contents and a disordered
                      transition-metal layer, exhibits the remarkable property of
                      complete suppression of O-type layer formation up to the
                      highest charge voltage of 4.5 V. The cathode demonstrates
                      reversible high-voltage Fe and O redox reactions without any
                      phase transition. The P to O phase transition, accompanied
                      by transition-metal-migration and □–O–□ (□ =
                      vacancy) formation, is essential for the activation of
                      O-redox in undoped Fe–Mn cathodes. The highly ionic
                      character of Li–O bonds in NLFM increases the electron
                      density over the O orbitals, making O-redox feasible in the
                      P2-phase even in the absence of □–O–□. By retaining
                      its P2 phase at the highest state of charge, the cathode
                      shows a negligible volume change of less than $1.8\%,$
                      thereby yielding high energy density along with excellent
                      retention. The improved electrochemical performance of the
                      Li-doped cathode arises from dopant-induced static and
                      dynamic disorder, ensuring structural stability across a
                      wide SOC range.},
      cin          = {DOOR ; HAS-User / FS-NL},
      ddc          = {620},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-NL-20120731},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      INDIA-DESY - INDIA-DESY Collaboration
                      $(2020_Join2-INDIA-DESY)$ / FS-Proposal: I-20240481 EC
                      (I-20240481-EC)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      $G:(DE-HGF)2020_Join2-INDIA-DESY$ /
                      G:(DE-H253)I-20240481-EC},
      experiment   = {EXP:(DE-H253)P-P65-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1039/D5EB00106D},
      url          = {https://bib-pubdb1.desy.de/record/639476},
}