Integrated all-solid-state secondary battery

A method for manufacturing an integral solid state rechargeable battery, comprising:

• applying a first mixed slurry containing 85 wt % to 99 wt % of a conductive ceramic material, 1 wt % to 15 wt % of a polymer, and a solvent onto an electrode;
• drying the first mixed slurry to remove the solvent to obtain a first composite film containing the conductive ceramic material and the polymer;
• applying a second mixed slurry, different from the first mixed slurry, containing 60 wt % to 99 wt % of a conductive ceramic material, 1 wt % to 40 wt % of a polymer, and a solvent onto the first composite film;
• drying the second mixed slurry to remove the solvent to obtain a multilayered composite film consisting of the first composite film and a second composite film containing the conductive ceramic material and the polymer;
• and
• absorbing 1 to 5 parts by weight of a liquid electrolyte with respect to 100 parts by weight of the multilayered composite film containing the conductive ceramic material and the polymer in the multilayered composite film to produce a solid state electrolyte, wherein the liquid electrolyte is prepared by dissolving a lithium salt or a sodium salt in a non-aqueous organic solvent;
• and
• covering the electrode with another electrode after absorbing the liquid electrolyte.

A method for manufacturing an integral solid state rechargeable battery, comprising:

• preparing a positive electrode unit in which a positive electrode and a first solid electrolyte are integrated;
• simultaneously or sequentially preparing a negative electrode unit in which a negative electrode and a second solid electrolyte are integrated;
• and
• attaching the positive electrode unit and the negative electrode unit,
• wherein the positive electrode unit is prepared through steps comprising:
• applying a first mixed slurry containing 85 wt % to 99 wt % of a conductive ceramic material, 1 wt % to 15 wt % of a polymer, and a solvent onto the positive electrode;
• drying the first mixed slurry to remove the solvent to obtain a first composite film containing the conductive ceramic material and the polymer;
• and
• absorbing 1 to 5 parts by weight of a liquid electrolyte with respect to 100 parts by weight of the first composite film containing the conductive ceramic material and the polymer in the first composite film to produce a solid state electrolyte, wherein the liquid electrolyte is prepared by dissolving a lithium salt or a sodium salt in a non-aqueous organic solvent,
• wherein the negative electrode unit is prepared through steps comprising:
• applying a second mixed slurry containing 85 wt % to 99 wt % of a conductive ceramic material, 1 wt % to 15 wt % of a polymer, and a solvent onto the negative electrode;
• drying the second mixed slurry to remove the solvent to obtain a second composite film containing the conductive ceramic material and the polymer;
• and
• absorbing 1 to 5 parts by weight of a liquid electrolyte with respect to 100 parts by weight of the second composite film containing the conductive ceramic material and the polymer in the second composite film to produce another solid state electrolyte, wherein the liquid electrolyte is prepared by dissolving a lithium salt or a sodium salt in a non-aqueous organic solvent,
• wherein the attaching step of the positive electrode unit and the negative electrode unit is performed after the absorbing step of the preparation of the positive electrode unit and the absorbing step of the preparation of the negative electrode unit.