In FIG. 6, various chemical elements make up the crystal structure 600. For example, first atoms 605, such as metal atoms, may comprise a portion of the crystal structure 600, and second atoms 610, such as oxygen atoms, may comprise a portion of the crystal structure 600. Various defects may be included in the crystal structure 600, which may be naturally occurring or intentionally introduced. As illustrated, crystal structure 600 includes voids or crystallographic defects 615, which may correspond to vacancy defects, for example, where atoms of the crystal structure are missing. Voids and crystallographic defects 615 may be useful for allowing transmission of oxygen anions through the crystal structure 600, and provide for the ability of oxygen anions to efficiently migrate through the solid electrolyte. It will be appreciated that other crystal structure features beyond voids or crystallographic defects such as vacancy defects may also exist in the solid electrolyte, such as crystallographic defects including interstitial defects, line defects, planar defects, bulk defects, and lattice imperfections. An interstitial defect 620 is illustrated. Each of the voids or crystallographic defects may, in some embodiments, contribute to the ability of ions to efficiently migrate through a solid electrolyte.
