Electrochemical energy storage devices
摘要
說明書
Optionally, the solid electrolyte comprises a composite solid electrolyte including a plurality of different ceramics. For example the solid electrolyte may comprise layers of different ceramic materials. In embodiments, strained solid electrolytes may exhibit higher ionic conductivities than unstrained solid electrolytes and, thus, imparting strain on a solid electrolyte may provide for a way to increase the ionic conductivity of the solid electrolyte to a level suitable for use in a solid-state energy storage device. In embodiments, introducing stress or strain into the electrolyte may result in the generation of voids or other defects, such as crystallographic defects. Use of composite solid electrolytes may be useful, in embodiments, to impart strain or stress on the solid electrolyte materials, as different solid electrolyte materials may exhibit different thermal expansion properties. In embodiments, the solid electrolytes may be formed at high temperatures and then allowed to relax to ambient temperature, where the different thermal expansion properties of different materials may create levels of strain that allow the solid electrolyte to possess an ionic conductivity suitable for use in an energy storage device. The stress or strain placed on the electrolyte may, in embodiments, modify the ionic conductivity of the electrolyte to increase it to a level beyond that in the unstressed or unstrained condition. Other techniques may be useful for imparting stress or strain to an electrolyte, including exploiting different thermal expansion characteristics of non-electrolyte materials positioned proximal to, adjacent to, or in direct contact with the electrolyte.
