All-solid secondary battery and method of preparing the same

A method of preparing an all-solid secondary battery, the method comprising:

• providing a cathode layer comprising a cathode active material layer;
• providing a first anode active material layer comprising an organic electrolyte and an anode active material that is capable of forming an alloy with lithium or a compound with lithium;
• wherein the anode active material comprises at least one of a carbon-containing anode active material, a metal anode active material, or metalloid anode active material;
• wherein the first anode active material layer comprises the organic electrolyte in a range from about 0.1 parts by weight to about 2.5 parts by weight, based on 100 parts by weight of the anode active material;
• disposing the first anode active material layer on a solid electrolyte layer to prepare a stack;
• and
• disposing the cathode layer on the solid electrolyte layer of the stack,
• wherein the organic electrolyte comprises an organic salt comprising an organic cation and an anion,
• wherein the organic cation comprises a heterocyclic cation comprising 1 to 3 heteroatoms, and
• wherein an anode layer comprises a current collector and the first anode active material layer.

A method of preparing an all-solid secondary battery, the method comprising:

• providing a cathode layer comprising a cathode active material layer;
• providing a first anode active material layer comprising an organic electrolyte and an anode active material that is capable of forming an alloy with lithium or a compound with lithium and a second anode active material layer comprising a metal layer comprising lithium or a lithium alloy;
• wherein the anode active material comprises at least one of a carbon-containing anode active material, a metal anode active material, or metalloid anode active material;
• wherein the first anode active material layer comprises the organic electrolyte in a range from about 0.1 parts by weight to about 2.5 parts by weight, based on 100 parts by weight of the anode active material;
• disposing the first anode active material layer on the second anode active material layer to prepare a first stack;
• disposing a solid electrolyte layer on the first anode active material layer of the first stack to prepare a second stack;
• and
• disposing the cathode layer on the solid electrolyte layer of the second stack,
• wherein the organic electrolyte comprises an organic salt comprising an organic cation and an anion,
• wherein the organic cation comprises a heterocyclic cation comprising 1 to 3 heteroatoms, and
• wherein an anode layer comprises a current collector, the first anode active material layer, and the second anode active material layer.