Method for preparing all-solid-state secondary battery having improved interfacial properties and all-solid-state secondary battery prepared thereby

摘要

According to the present invention, the electrode active material is miniaturized through secondary milling to prepare a microelectrode active material having an average particle size specific surface area of 10 to 30 m ² / g, By forming a negative electrode having a tilted structure of the composite layer and the electrode active material layer using the microelectrode active material, the movement of ions between the composite layer and the solid electrolyte layer and the movement of electrons between the electrode active material layer and the current collector layer can occur smoothly In addition, the interface area between the electrode and the electrolyte can be widened to maximize the utilization ratio of lithium, thereby manufacturing a pre-solid battery having excellent electrical and chemical performance.