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1.发明公开
公开(公告)号：EP4138202A1
公开(公告)日：2023-02-22
申请号：EP21843543.6
申请日：2021-07-13
发明人： KA, Kyung-Ryun , KWON, Hye-Jin , LEE, Seung-Hyun , LEE, Je-An
IPC分类号： H01M50/449 , H01M50/46 , H01M50/446 , H01M50/403
摘要： The present disclosure relates to a separator for a secondary battery, including: a porous polymer substrate; a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a first binder polymer for interconnecting and fixing the inorganic particles; and an adhesive layer formed on the top surface of the porous coating layer and including a second binder polymer, wherein the adhesive layer includes a first layer that is in contact with the top surface of the porous coating layer, and a second layer integrated with the first layer and facing an electrode, and the second layer has an average pore size larger than the average pore size of the first layer.
The separator for a secondary battery can improve the problem related with resistance, while ensuring adhesion to an electrode.-
2.发明公开
公开(公告)号：EP4164044A1
公开(公告)日：2023-04-12
申请号：EP21876050.2
申请日：2021-09-29
发明人： KWON, Hye-Jin , KA, Kyung-Ryun , LEE, Seung-Hyun
IPC分类号： H01M50/403 , H01M50/449 , H01M50/446 , H01M10/052
摘要： The present disclosure relates to a separator for a lithium secondary battery, a method for manufacturing the same, and a secondary battery including the same. Particularly, the separator includes a porous coating layer divided into a top layer, an intermediate layer and a bottom layer, wherein the content of a particle-type binder polymer in the top layer is larger than the content of the particle-type binder polymer in the bottom layer, and the porous coating layer includes a dispersant having a carboxyl group and a glycol group.
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公开(公告)号：EP4138201A1
公开(公告)日：2023-02-22
申请号：EP21829439.5
申请日：2021-06-25
发明人： KWON, Hye-Jin , KIM, Myeong-Soo , HEO, Jin-Woo
IPC分类号： H01M50/449 , H01M50/446 , H01M10/42 , H01M10/052
摘要： Provided is a separator for a lithium secondary battery, including: a porous polymer substrate; and a porous coating layer formed on at least one surface of the porous polymer substrate, wherein the porous coating layer includes flame-resistant particles, a highly heat resistant binder polymer and a fluorine-based binder polymer, and each of the flame-resistant particles, the highly heat resistant binder polymer and the fluorine-based binder polymer satisfies a predetermined content. In this manner, it is possible to provide a separator having improved heat resistance and mechanical properties despite its thin film structure.
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公开(公告)号：EP3937274A1
公开(公告)日：2022-01-12
申请号：EP20773459.1
申请日：2020-03-20
发明人： KWON, Hye-Jin , KIM, Myeong-Soo , YOON, Su-Jin
摘要： Provided is a separator for an electrochemical device. The separator includes a porous coating layer formed from an acid which participates in crosslinking upon the crosslinking of a crosslinkable polymer. As a result, the separator has increased heat resistance, safety and physical strength, shows improved peel strength between the porous substrate and the porous coating layer, and prevents separation of the inorganic particles from the porous coating layer. In addition, the separator shows an improved crosslinking degree so that the added amount of a crosslinkable binder resin may be reduced. Thus, it is possible to increase the added amount of a non-crosslinkable resin, inorganic particles, or both. In other words, even when using a small amount of a crosslinkable binder resin, it is possible to provide both an effect of improving heat resistance and an effect of improving adhesion.
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5.发明公开
公开(公告)号：EP4138198A1
公开(公告)日：2023-02-22
申请号：EP21878073.2
申请日：2021-10-08
发明人： LEE, Seung-Hyun , KA, Kyung-Ryun , KWON, Hye-Jin
IPC分类号： H01M50/446 , H01M50/449 , H01M50/403 , H01M50/46
摘要： The present disclosure relates to a separator. The separator includes an electrode adhesive portion having a high content of binder and formed on the surface of the separator to provide increased binding force to an electrode and improved processability during the manufacture of a battery. Thus, the separator and the electrode are in close contact with each other to prevent generation of a gap, thereby providing an effect of improving resistance characteristics. In addition, the separator includes an inorganic coating layer disposed on the surface of a porous substrate, wherein the inorganic coating layer has a porous structure derived from the interstitial volumes among the inorganic particles, and thus the separator has suitable porosity and a sufficient degree of electrolyte retention. Further, since the separator includes the inorganic coating layer on the surface of the porous substrate, the separator ensures heat resistance and is prevented from shrinking, even when the internal temperature of a battery is increased. The present disclosure also relates to a method for manufacturing a separator. The method includes forming the inorganic coating layer and the electrode adhesive portion disposed on the inorganic coating layer through a single step using the density of inorganic particles and that of binder resin particles, and thus has an advantage in terms of convenience of processing.
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公开(公告)号：EP4050721A1
公开(公告)日：2022-08-31
申请号：EP20889718.1
申请日：2020-11-17
发明人： SUNG, Dong-Wook , KWON, Hye-Jin , SHIN, Sun-Yong , LEE, Jong-Yoon
IPC分类号： H01M50/409 , H01M50/40 , H01M10/052
摘要： Disclosed is a separator for an electrochemical device having a low content of secondary particles formed by aggregation of an inorganic particles in the inorganic coating layer. Particularly, the separator has a low content of secondary particles protruding from the separator surface to a predetermined height or more. Since the inorganic particles are not aggregated but are distributed homogeneously in the inorganic coating layer, the separator allows uniform dispersion of pressure over the whole surface of the separator, when it is applied to a battery and pressure is generated in the battery due to the charge/discharge of the battery. In this manner, it is possible to minimize deformation of the separator. Meanwhile, when using a porous film made of a polymer material as a separator substrate, there is a low tendency for intensive application of pressure from the secondary particles to a local site of the separator substrate, and thus the separator substrate is less damaged and a possibility of short-circuit generation is reduced.
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公开(公告)号：EP4050720A1
公开(公告)日：2022-08-31
申请号：EP20889799.1
申请日：2020-11-17
发明人： HEO, Jin-Woo , KWON, Hye-Jin , YOON, Su-Jin
IPC分类号： H01M50/40 , H01M50/409
摘要： Disclosed is a method for manufacturing a separator for an electrochemical device. The method for manufacturing a separator uses polyvinyl pyrrolidone (PVP) functioning as a dispersing agent, and thus provides high dispersibility of particles and prevents aggregation of particles, even when inorganic particles having a small particle diameter is used in slurry for forming a porous coating layer. Therefore, the inorganic particles are distributed homogeneously in the porous coating layer of a finished separator. In addition, since PVP is used in combination with a fluorinated binder resin as a binder resin for the porous coating layer, the separator shows improved peel strength and adhesion to an electrode. Further, a non-solvent ingredient for the fluorinated binder resin is used as a solvent for PVP, and a non-solvent ingredient for PVP is used as a solvent for the fluorinated binder resin. As a result, while the porous coating layer is dried under a humidified condition, phase separation of the binder resin in the porous coating layer is induced well, and thus formation of an adhesive portion on the surface portion of the porous coating layer is accelerated.
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公开(公告)号：EP4191778A1
公开(公告)日：2023-06-07
申请号：EP21854412.0
申请日：2021-08-06
发明人： KWON, Hye-Jin , KA, Kyung-Ryun , LEE, Seung-Hyun , LEE, Je-An
IPC分类号： H01M50/449 , H01M50/46 , H01M50/446 , H01M50/403 , H01M10/058 , H01M10/052
摘要： Disclosed is a separator for a secondary battery, including: a porous polymer substrate having a plurality of pores; and a porous coating layer disposed on at least one surface of the porous polymer substrate and including a plurality of inorganic particles and a urethane bond-containing crosslinked polymer, wherein the urethane bond-containing crosslinked polymer is disposed partially or totally on the surfaces of the inorganic particles so that the inorganic particles may be interconnected and fixed, and the urethane bond-containing crosslinked polymer has a glass transition temperature (Tg) of-15 to 32°C. A secondary battery including the separator is also disclosed.
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公开(公告)号：EP4152509A1
公开(公告)日：2023-03-22
申请号：EP21845906.3
申请日：2021-07-15
发明人： KA, Kyung-Ryun , KWON, Hye-Jin , LEE, Seung-Hyun , LEE, Je-An
IPC分类号： H01M50/449 , H01M50/46 , H01M50/446 , H01M50/403 , H01M10/052 , H01M10/058
摘要： The present disclosure relates to a separator for a secondary battery comprising a porous polymer substrate; a first layer formed on at least one surface of the porous polymer substrate, and comprising inorganic particles and a nonparticulate acrylic polymer having a glass transition temperature of 15°C or less, wherein the nonparticulate acrylic polymer connects and fixes the inorganic particles; and a second layer formed on a surface of the first layer, and comprising a particulate polymer having a glass transition temperature of 20°C to 50°C.
The separator for a secondary battery according to the present disclosure has good adhesion with electrode and can solve the resistance problem in the presence of the inorganic particles.-
公开(公告)号：EP4131619A1
公开(公告)日：2023-02-08
申请号：EP21915853.2
申请日：2021-12-29
发明人： LEE, Seung-Hyun , KA, Kyung-Ryun , KWON, Hye-Jin
IPC分类号： H01M50/403 , H01M50/46 , H01M50/426 , H01M10/052
摘要： Disclosed is a separator for an electrochemical device. The separator has an electrode adhesive layer, and two types of solvents are used when coating the electrode adhesive layer, wherein the ratio of polarity of the solvents is used to induce a beta crystal phase of the second binder resin, and thus a uniform porous structure is formed to provide an improved lithium-ion conduction path. In this manner, even when the adhesive layer is formed on the separator, the separator does not cause an increase in resistance.
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