Research progress and optimization strategies of solid-state electrolytes
All-solid-state lithium batteries is considered to be the most promising energy storage device for the next generation due to its high energy density and safety.Solid-state electrolyte,as the core component of all-solid-state lithium batteries,has attracted widespread attention due to its advantages such as non-flammability,high mechanical properties,and good compatibility with lithium metals.However,the disadvantages,including low ionic conductivity,lithium dendrite growth,and interface issues between the SSEs and electrodes limit the practical application of solid-state electrolytes in all-solid-state lithium batteries.Therefore,in this review,the characteristics and research progress of oxide-based solid-state electrolyte,sulfide-based solid-state electrolyte,polymer-based solid-state electrolyte,and composite solid-state electrolyte are summarized.Moreover the problems of lithium dendrite growth and interface resistance faced by different types of solid-state electrolytes are described,and the corresponding optimization strategies are proposed.The current challenges for all-solid-state electrolytes in all-solid-state batteries are pointed out.At the same time,a brief introduction has been given to the research process on the application of composite solid-state electrolytes in all-solid-state lithium batteries.It is hoped to provide a reference for the development of all-solid-state lithium batteries and accelerate their commercial application.
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