Garnet type solid electrolyte material and preparation method thereof, precursor material for solid electrolyte and preparation method thereof, and lithium ion battery

The invention relates to the field of solid electrolyte materials, and discloses a garnet type solid electrolyte material and a preparation method thereof, a precursor material for a solid electrolyte and a preparation method thereof, and a lithium ion battery, the electrolyte material is a smooth-edge secondary aggregate formed by primary particles A with smooth and round surfaces; the primary particles A are spherical and/or sphere-like; the average size Z50 of the primary particles A measured by SEM satisfies the following relationship: 0.5 [mu] m < = Z50 < = 5 [mu] m; the median particle size d50, measured by a laser particle analyzer, of the secondary aggregate meets the following relation: d50 is more than or equal to 7 microns and less than or equal to 17 microns. The garnet type solid electrolyte material provided by the invention can effectively improve the transmission speed of Li < + >, thereby improving the ionic conductivity of the solid electrolyte material. 本发明涉及固态电解质材料领域，公开了石榴石型固态电解质材料及制备方法和固态