fig10

Figure 10. (A) Schematic diagram of potassium mechanism of Bi/K and Sb/k systems in KIBs. Copyright 2018, The Journal of Physical Chemistry C^[110]. (B) The XRD patterns for electrodes at various charge/discharge states. Copyright 2022, Applied Surface Science^[111]. (C) Schematic presentation of the formation and (de-)potassiation process of Sb-C-rGO composite. (D) Crystal structure of cubic K₃Sb (c-K₃Sb) and hexagonal K₃Sb (h-K₃Sb). (E) Formation energies of KxSb obtained by the ionic substitution method. Phase stability is a relative energy of a given phase compared to all other materials with different compositions. (F) Atomic migration barriers in the cubic A₃Sb phase (A = K, Na, and Li). Copyright 2019, ACS Applied Materials & Interfaces^[117].