US 11,699,831 B2
Separator and electrochemical device comprising same
Hye-Jin Kwon, Daejeon (KR); In-Hyouk Sung, Daejeon (KR); Myeong-Soo Kim, Daejeon (KR); and Su-Jin Yoon, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Aug. 23, 2022, as Appl. No. 17/893,362.
Application 17/893,362 is a continuation of application No. 16/629,218, granted, now 11,469,476, previously published as PCT/KR2018/012363, filed on Oct. 18, 2018.
Claims priority of application No. 10-2017-0136464 (KR), filed on Oct. 20, 2017.
Prior Publication US 2022/0407184 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/46 (2021.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/437 (2021.01); H01M 50/449 (2021.01); H01M 50/431 (2021.01); H01M 50/411 (2021.01)
CPC H01M 50/461 (2021.01) [H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 50/417 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/411 (2021.01); H01M 50/426 (2021.01); H01M 50/431 (2021.01); H01M 50/437 (2021.01); H01M 50/449 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A separator comprising:
a porous polymer substrate having a plurality of pores;
a separator base formed on at least one surface of the porous polymer substrate, said separator base comprising a porous coating layer comprising a plurality of first inorganic particles and a binder polymer positioned on a whole or a part of a surface of the first inorganic particles to connect and fix the first inorganic particles with each other; and
an adhesive layer formed on at least one surface of the separator base, said adhesive layer comprising a plurality of second inorganic particles and adhesive resin particles,
wherein a weight ratio of the second inorganic particles to the adhesive resin particles is 10:90-50:50, and
a diameter of the adhesive resin particles is 1.2-3.0 times a diameter of the second inorganic particles,
wherein the second inorganic particles have an average particle diameter of 250 nm to 500 nm.