NEGATIVE ACTIVE MATERIAL-SOLID ELECTROLYTE COMPOSITE FOR ALL-SOLID LITHIUM SECONDARY BATTERY WITH EMPTY SPACE BETWEEN NEGATIVE ACTIVE MATERIAL AND SOLID ELECTROLYTE LAYER AND MANUFACTURING METHOD THEREOF AND ALL-SOLID LITHIUM SECONDARY BATTERY INCLUDING THE SAME

摘要

The present invention relates to a complex of a negative electrode active material and a solid electrolyte for an all-solid lithium secondary battery. The complex has an empty space between the negative electrode active material and a solid electrolyte layer. The present invention also relates to a method for preparing the complex and the all-solid lithium secondary battery including the complex. More specifically, the complex includes: the negative electrode active material which is a core unit and takes the form of an oxide prepared by using one or more types of materials selected from a group including tin (Sn) and silica (SiO_2); and the solid electrolyte in a transition metal precursor layer surrounding the core unit as a shell unit. The empty space is arranged between the core unit and the shell unit.