Method for manufacturing electrode for all-solid-state battery, and electrode manufactured thereby
A method for manufacturing an electrode for an all-solid-state battery is provided. The method comprises steps of applying granules containing an active material on a current collector, aligning and fixing the granules, applying a solid electrolyte solution on the granules, and moving the solid electrolyte solution into pores between the granules by reducing the pressure by vacuum at 20° C. to 40° C.
1 . A method of manufacturing an electrode for an all-solid-state battery, the method comprising the steps of:
(1) applying granules containing an active material on a current collector;
(2) aligning and fixing the granules applied on the current collector to form a granule layer;
(3) applying a solid electrolyte solution on the granules aligned and fixed on the current collector; and
(4) moving the solid electrolyte solution applied on the granules into pores between the granules,
wherein in step (3), the solid electrolyte solution is applied in an amount of 20% by volume to 40% by volume based on the volume of the granule layer, and
wherein step (4) is carried out by reducing the pressure by vacuum at 20° C. to 40° C.
2 . The method according to claim 1 , wherein the granules are spherical particles having a diameter of 30 μm to 150 μm.
3 . The method according to claim 1 , wherein the granule layer is composed of the granules fixed in step (2) has a porosity of 30% to 70%.
4 . The method according to claim 1 , wherein the granule layer is composed of the granules fixed in step (2) has a thickness of 100 μm to 300 μm.
5 . The method according to claim 3 , wherein in step ( 3 ), the solid electrolyte solution is applied in an amount of 40% by volume to 70% by volume based on the pore volume of the granule layer.
6 . The method according to claim 1 , wherein the solid electrolyte solution contains 20% by weight to 40% by weight of solid components based on the total weight of the solid electrolyte solution.
7 . The method according to claim 1 , wherein step (4) is performed by repeating an operating period and a resting period of applying the vacuum at intervals of 5 to 15 seconds.
8 . The method according to claim 7 , wherein a cycle of the operating period and the resting period is set as one cycle, and step (4) is performed by repeating 3 to 10 cycles.
9 . The method according to claim 1 , wherein the method further comprises a step of (5) drying the result of step (4) under reduced pressure by vacuum at 60° C. to 80° C.