Preparation method of amorphous chlorinated oxysalt-based solid electrolyte and application of amorphous chlorinated oxysalt-based solid electrolyte in all-solid-state lithium battery

Abstract

The invention provides a method for preparing an amorphous chlorinated oxysalt-based solid electrolyte based on mechanical synthesis and application of the amorphous chlorinated oxysalt-based solid electrolyte, and a series of chlorinated oxysalt-based solid electrolytes are mechanically synthesized through a strategy of activating oxyacid radical lithium salt by using a high-activity liquid chloride precursor. The process is simple, the raw material cost is low, and the prepared solid electrolyte powder is of an amorphous structure, has good room-temperature ionic conductivity, is excellent in deformability, can realize stable circulation of an all-solid-state lithium battery under low stacking pressure, has good positive electrode interface stability, and is suitable for large-scale production. And the assembled all-solid-state lithium battery shows good cycle performance under high cut-off voltage.

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