fig3

Figure 3. (A) XRD patterns of NFM111 exposed to different atmospheres with magnified regions of (003), (104), and (110)^[60]. (B) 3D rendering of selected representative secondary-ion fragments from ToF-SIMS characterization. Samples were stored in N₂ with H₂¹⁸O vapor for 72 h and in CO₂ with H₂¹⁸O vapor for 24 h^[60]. (C) Refinement of the NPD pattern of the sample stored in D₂O vapor and CO₂ for 12 h, where D atoms are placed at the tetrahedral sites in the Na layer (Na_tetra in inset)^[60]. (D) Ni K-edge XAS spectra of NFM111 and NFM424 before and after being stored in O2 with water vapor (RH = 80%) for 48 h^[60]. (A-D) Figures reprinted with permission from Ref.^[60]. Copyright 2024 The American Association for the Advancement of Science^[60]. (E) The XRD patterns of KFMTO and KFMTO·0.16H₂O powder being aged in the air for seven days^[61]. Reprinted with permission from Ref.^[61]. Copyright 2022 Wiley-VCH^[61]. (F) cyclic performance of KMO and exp-KMO at 0.5 C^[62]. Reprinted with permission from Ref.^[62]. Copyright 2024 Wiley-VCH^[62].