METHOD FOR PREPARING ALL-SOLID-STATE BATTERY AND ALL-SOLID-STATE PREPARED THEREBY

The present invention relates to an all-solid-state battery manufacturing method comprising the steps of: (a) preparing an electrode assembly having a solid electrolyte layer disposed between a positive electrode and a negative electrode, (b) pressing and heating the electrode assembly, (c) receiving the electrode assembly in a battery case to assemble an all-solid-state battery, and (d) pressing and heating the all-solid-state battery, wherein the negative electrode includes no negative electrode mixture, whereby lifespan characteristics of the all-solid-state battery are improved and safety of the all-solid-state battery is secured.