CPC H01M 50/461 (2021.01) [H01M 50/403 (2021.01); H01M 50/414 (2021.01); H01M 50/463 (2021.01); H01M 50/409 (2021.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] | 6 Claims |
1. A separator for an electrochemical device, comprising:
a porous polymer substrate; and
an electrode adhesive layer formed on at least one surface of the porous polymer substrate,
wherein the electrode adhesive layer comprises at least two units containing a binder polymer, and the units are separated from each other by a non-coated portion having no electrode adhesive layer,
the separator has a polygonal shape having at least four sides, the polygon has an internal angle larger than 0° and smaller than 180°, the non-coated portion extends from one side (a first side) to another side (a second side) of the separator in a linear shape having a predetermined width, and the first side and the second side are adjoining each other and are linked to each other by a point,
wherein the separator has a rectangular surface shape having an aspect ratio larger than 1,
the separator comprises at least one linear non-coated portion extending from a long side to a short side of the separator, and
the separator does not include a non-coated portion extending from one long side to the other long side of the separator and a non-coated portion extending from one short side to the other short side of the separator.
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