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. 2023 Nov 13;9(11):2012–2035. doi: 10.1021/acscentsci.3c01022

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(a) Variation of the crystal structures in Na_2/3Mn_2/3Ni_1/3O₂ with Nb doping. (b) In situ XRD patterns of the electrodes during the charge and discharge process. (c) Charge density distribution in the Nb-doped Na_2/3Mn_2/3Ni_1/3O_2.. (d) Calculated energy difference between different Na sites with and without Nb doping. Reproduced with permission from ref (68). Copyright 2022 from Springer Nature.