fig8

Figure 8. (A) Cu K-edge ex-situ XANES spectra of KMCO^[111]. Comparison of XRD patterns of (B) K_0.3MnO₂ and (C) KMCO between pristine and after four-week air exposure^[111]. (A-C) Figures reprinted with permission from Ref.^[111]. Copyright 2021 Royal Society of Chemistry^[111]. (D) HAADF-STEM image of K_0.45Mn_0.9Al_0.1O₂ along the [100] zone axes^[112]. (E) Schematic illustration of the interphase layer for K_0.45Mn_0.9Al_0.1O₂ electrode after cycling^[112]. (D and E) Figures reprinted with permission from Ref.^[112]. Copyright 2023 Elsevier. (F) The XRD patterns of KFMTO and KFMTO·0.16H₂O powder being aged in the air for seven days^[61]. (G) GCD curves of the pristine and aged KFMTO and KFMTO·0.16H₂O^[61]. (F and G) Figures reprinted with permission from Ref.^[61]. Copyright 2022 Wiley-VCH^[61].