Lithium battery and method of preparing the same

A method of preparing a lithium battery, the method comprising:

• preparing a mixture including lithium phosphorus sulfide and metal sulfide;
• preparing an electrode composite by applying a physical pressure to the mixture, wherein the electrode composite comprises lithium phosphorus sulfide, lithium metal sulfide, and amorphous sulfide;
• preparing an electrode active layer by using the electrode composite;
• forming an electrode current collector on one side of the electrode active layer;
• and
• forming a solid electrolyte layer on another side of the electrode active layer.

A method of preparing a lithium battery, the method comprising:

• preparing a mixture including lithium sulfide, phosphorus sulfide, metal, and sulfur;
• preparing an electrode composite by applying a physical pressure to the mixture, wherein the electrode composite comprises lithium phosphorus sulfide, lithium metal sulfide, and amorphous sulfide;
• preparing an electrode active layer by using the electrode composite;
• forming an electrode current collector on one side of the electrode active layer;
• and
• forming an electrolyte layer on another side of the electrode active layer.