All-solid secondary battery, and method of manufacturing all-solid secondary battery

An all-solid secondary battery comprising:

• a cathode layer comprising a cathode active material layer;
• an anode layer;
• and
• a solid electrolyte layer comprising a solid electrolyte, wherein the solid electrolyte layer is disposed between the cathode layer and the anode layer,
• wherein the anode layer comprises:
• an anode current collector, a first anode active material layer in contact with the solid electrolyte layer, and
• a second anode active material layer disposed between the anode current collector and the first anode active material layer,
• a third anode active material layer disposed between the anode current collector and the second anode active material layer or between the first anode active material layer and the second anode active material layer,
• wherein the third anode active material layer is a metal layer comprising lithium or a lithium alloy,
• wherein the first anode active material layer comprises a first carbonaceous anode active material, and the second anode active material layer comprises a second carbonaceous anode active material, and
• a first intensity ratio of an intensity of a D band peak to an intensity of a G band peak in a Raman spectrum of the first carbonaceous anode active material is less than a second intensity ratio of an intensity of a D band peak to an intensity of a G band peak in a Raman spectrum of the second carbonaceous anode active material.