Lithium ion inorganic solid electrolyte and aqueous synthesis method thereof

The invention discloses a lithium ion inorganic solid electrolyte and a water system synthesis method thereof, a lithium source and a precursor are weighed, the molar ratio of Li to Na of the lithium source and the precursor is 1: 1-1: 20, and then the inorganic solid electrolyte Li3Zr2Si2PO12 is prepared through one or more of a water heat exchange method, a mechanical stirring exchange method and a water system ball milling exchange method. The inorganic lithium salt is high in solubility in a water solvent system, the use of ionic liquid and organic lithium salt needing atmosphere protection can be avoided, synthesis and operation can be performed in a normal environment, and the preparation difficulty is reduced. 本发明公开了一种锂离子无机固态电解质及其水系合成方法，称取锂源和前驱体，锂源和前驱体的Li、Na摩尔比为1:1～1:20，然后通过水热交换法、机械搅拌交换法和水系球磨交换法中的一种或者多种方法组合制备得到无机固态电解质Li3Zr2Si2PO12。本发明中无机锂盐类在水溶剂体系中溶解度较高，可以避免使用离子液体和需要气氛保护的有机锂盐，可以在正常环境中合成和操作，降低了制备难度。