公开(公告)号：US11258135B2

公开(公告)日：2022-02-22

申请号：US16463441

申请日：2018-01-05

Applicant: LG CHEM, LTD.

Inventor： Kwan Woo Nam ,  Su Jin Yoon ,  Hye Jin Kwon ,  Chan Jong Kim ,  Je An Lee

IPC: H01M2/16 ,  H01M50/449 ,  H01M50/403 ,  H01M50/411 ,  H01M50/431

Abstract: A functional binder and a separator including the functional binder, in which the separator includes a porous polyolefin substrate and an organic-inorganic hybrid porous coating layer formed on at least one surface of the substrate and configured to include a mixture of inorganic particles and a binder compound, thus increasing binder-inorganic material adhesion and substrate-binder adhesion while preventing internal shorting from occurring by performing self-healing of damage to the separator, enhancing the adhesion of the separator to a cathode and an anode, and withstanding the dissolution of a transition metal of a cathode material. The binder contains 10 wt % or more of a hydroxyl group per molecule thereof.

公开(公告)号：US11349177B2

公开(公告)日：2022-05-31

申请号：US16612164

申请日：2018-12-21

Applicant: LG CHEM, LTD.

Inventor： In Hyouk Sung ,  Su Jin Yoon ,  Sang Joon Lee ,  Hye Jin Kwon

IPC: H01M50/451 ,  H01M50/417 ,  H01M50/434 ,  H01M10/0525

Abstract: A separator for secondary batteries, including: a separator substrate having at least one surface, wherein the separator substrate includes a polyolefin-based polymer resin having a porous structure and a coating layer is applied to one surface or opposite surfaces of a separator substrate made of a polyolefin-based polymer resin having a porous structure, wherein the coating layer includes a thickener, a filler, a particle-type binder, and a dissolution-type binder, wherein the thickener comprises carboxymethyl cellulose, and wherein an amount of the particle-type binder is greater than an amount of the dissolution-type binder.