Manufacturing method of electrode, electric storage device, and intermediate laminate member
View Patent ↗In a current collector laminating step, a current-collector laminate unit 30 composed of current-collector materials 31 and 32 and a film material 33 is formed. Resist layers 34 having a predetermined pattern are formed on both surfaces of the current-collector laminate unit 30 . An etching process is performed with the resist layers 34 used as a mask, whereby through-holes 20 a and 23 a are formed on the respective current-collector materials 31 and 32 . The resist layers 34 are removed from the current-collector laminate unit 30 . Since the etching process is performed on the plural current-collector materials 31 and 32 , productivity of an electrode can be enhanced. During the application of the slurry, the film material 33 prevents the leakage of the electrode slurry. Therefore, the current-collector laminate unit 30 can be conveyed in the horizontal direction, whereby the productivity of the electrode can be enhanced.
1. A manufacturing method of an electrode provided with a perforated current collector, comprising:
a current collector laminating step in which plural current-collector materials are laminated on either of both and any of the surfaces of a block layer so as to form a current-collector laminate unit;
a protection layer formation step for forming a protection layer having a predetermined pattern on a front surface of the current-collector laminate unit;
an etching step for performing an etching process on the current-collector laminate unit having the protection layer formed thereon so as to form through-holes on each of the current-collector materials;
a first application step in which an electrode slurry is applied onto the front surface of the current-collector laminate unit on which the through-holes are formed;
a current collector peeling step in which the current-collector material having the electrode slurry applied thereon is peeled from the current-collector laminate unit; and
a second application step in which an electrode slurry is applied onto a back surface of the current-collector material peeled from the current-collector laminate unit.
2. A manufacturing method of an electrode according to claim 1 , wherein
the current-collector material is laminated on both the surfaces of the block layer in the current-collector laminating step,
the protection layers having the predetermined pattern are formed on both the surfaces of the current-collector laminate unit in the protection layer formation step, and
the through-holes are formed on each of the current-collector materials from both the surfaces of the current-collector laminate unit in the etching step.
3. A manufacturing method of an electrode according to claim 1 , wherein
plural current-collector materials are directly laminated in the current collector laminating step,
the block layer is formed over an entire surface of the current-collector laminate unit while the protection layer having the predetermined pattern is formed on the other surface of the current-collector laminate unit in the protection layer formation step, and
the through-holes are formed on each of the current-collector materials from the surface of the current-collector laminate unit, on which the protection layer having the predetermined pattern is formed, in the etching step.
4. A manufacturing method of an electrode according to claim 1 , wherein
the through-holes formed on each of the plural laminated current-collector materials are formed so as to be opposite to each other, and
the open surfaces of the through-holes, which are formed so as to be opposite to each other, are shifted from each other.
5. A manufacturing method of an electrode according to claim 1 , wherein
each of the through-holes formed on each of the laminated plural current-collector materials has drop-preventer of an electrode mixture layer provided on the inner surface of the through-hole.
6. A manufacturing method of an electrode according to claim 5 , wherein
the drop-preventer is configured by forming the open surface at the end of the through-hole, which is at the side in the penetration direction of the through-hole from the side where the electrode slurry is applied, to be smaller than the other open surface of the through-hole on a hypothetical plane formed by cutting the through-hole in parallel with the open surface.
7. A manufacturing method of an electrode according to claim 5 , wherein
the drop-preventer is a tapered shape from the open surface at the side where the electrode slurry is applied toward the other open surface of the through-hole.