公开(公告)号：US20170040616A1

公开(公告)日：2017-02-09

申请号：US15303983

申请日：2015-10-14

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Sun Young Shin ,  Su Yeon Lee ,  Eun Kyung Kim

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/04 ,  H01M4/36 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/587

CPC classification number: H01M4/628 ,  H01M4/0402 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/587 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525

Abstract: Disclosed are a negative electrode active material for secondary batteries, and a negative electrode, an electrode assembly and a secondary battery including the same. The negative electrode active material includes polyhedral crystalline carbon, a first surface treatment layer disposed on a surface of the crystalline carbon and including amorphous carbon or oxidized crystalline carbon, and a second surface treatment layer disposed on a surface of the first surface treatment layer and including a polyacrylic acid ester copolymer, thereby improving output characteristics of batteries based on increased mobility of electrons resulting from surface-to-surface contact between active materials, controlling reactivity with an electrolyte, and enhancing high-temperature storage performance of batteries.

Abstract translation: 公开了二次电池用负极活性物质，负极，电极组件和包含该负极活性物质的二次电池。 负极活性物质包括多面体结晶碳，设置在结晶碳的表面上的第一表面处理层，包括无定形碳或氧化的结晶碳，以及设置在第一表面处理层的表面上的第二表面处理层， 聚丙烯酸酯共聚物，从而基于活性材料之间的表面 - 接触引起的电子迁移率增加，控制与电解质的反应性和提高电池的高温存储性能，从而提高电池的输出特性。

公开(公告)号：US20160263840A1

公开(公告)日：2016-09-15

申请号：US14762347

申请日：2014-12-04

Applicant: LG CHEM. LTD.

Inventor： Yeon Sik Choi ,  Su Min Lee ,  Gi Dae Choi ,  Changhun Yun

IPC: B29C70/02 ,  B29C45/00 ,  B29C47/00 ,  C08K7/06

CPC classification number: B29C70/025 ,  B29C45/0001 ,  B29C45/0005 ,  B29C48/022 ,  B29K2077/00 ,  B29K2105/0023 ,  B29K2105/12 ,  B29K2105/16 ,  B29K2307/04 ,  B29K2507/04 ,  B29K2995/0005 ,  B29K2995/0046 ,  B29K2995/0077 ,  B29L2031/3406 ,  B29L2031/3481 ,  C08J3/203 ,  C08J2323/10 ,  C08J2367/02 ,  C08J2369/00 ,  C08J2377/06 ,  C08K7/02 ,  C08K7/06 ,  C08K7/24 ,  C08K2201/001 ,  C08K2201/01

Abstract: Provided is a composite produced by processing a resin composition including a thermoplastic resin, bundle type carbon nanotubes and a reinforcing material. The carbon nanotubes have an ID/IG of 1.0 to 1.0 before the processing. The ratio of residual length of the carbon nanotubes present in the composite is from 40% to 99%. The composite has improved mechanical properties without deterioration of conductivity. With these improvements, the composite can be used to manufacture various molded articles.

Abstract translation: 提供了通过加工包括热塑性树脂，束状碳纳米管和增强材料的树脂组合物制备的复合材料。 碳纳米管在加工前的ID / IG为1.0〜1.0。 存在于复合材料中的碳纳米管的残留长度的比例为40％至99％。 该复合材料具有改善的机械性能而不劣化导电性。 通过这些改进，复合材料可用于制造各种模制品。

公开(公告)号：US12034148B2

公开(公告)日：2024-07-09

申请号：US16756365

申请日：2018-10-26

Applicant: LG CHEM, LTD.

Inventor： Su Min Lee ,  Yong Ju Lee ,  Eun Kyung Kim ,  Rae Hwan Jo ,  Dong Hyuk Kim ,  Se Mi Park

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/483 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery, the negative electrode active material including, based on 100 parts by weight of the total negative electrode active material, 5 parts by weight to 20 parts by weight of a first carbon-based particle, 55 parts by weight to 90 parts by weight of a second carbon-based particle, and 1 part by weight to 40 parts by weight of a silicon-based particle, wherein the specific surface area of the first carbon-based particle is 1.5 m2/g to 4.5 m2/g, the specific surface area of the second carbon-based particle is 0.4 m2/g to 1.5 m2/g, and the specific surface area of the first carbon-based particle is greater than the specific surface area of the second carbon-based particle, and capable of solving the problem of lifespan deterioration which may be caused by the use of a silicon-based particle as a negative electrode active material.

公开(公告)号：US10811670B2

公开(公告)日：2020-10-20

申请号：US15269092

申请日：2016-09-19

Applicant: LG Chem, Ltd.

Inventor： Oh Byong Chae ,  Su Min Lee ,  Eun Kyung Kim ,  Sun Young Shin

IPC: H01M4/04 ,  H01M2/16 ,  H01M10/0525 ,  H01M2/14 ,  H01M10/42 ,  H01M10/04 ,  H01M10/052 ,  H01M4/02

Abstract: A method for manufacturing an electrode for a lithium secondary battery having reinforced safety is provided. In some embodiments, the method includes spraying a first mixture on a surface of an active material layer to form an insulating layer, wherein the insulating layer is a porous film and consists of a polymer or consists of the polymer and a first binder material, spraying a second mixture on the insulating layer to form a safety reinforcing layer, wherein the safety reinforcing layer consists of the second binder material and the inorganic oxide, and spraying a third mixture comprising microfilaments and a third binder material on the safety reinforcing layer to form an impregnation property improving layer, wherein a weight ratio of the microfilaments to the third binder material ranges from 10:90 to 30:70, and wherein the microfilaments have diameters of 0.1 to 10 μm and lengths of 50 to 500 μm.

公开(公告)号：US10797309B2

公开(公告)日：2020-10-06

申请号：US15737953

申请日：2016-11-11

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Su Min Lee ,  Eun Kyung Kim ,  Sun Young Shin

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/13 ,  H01M4/134 ,  H01M4/48 ,  H01M4/52 ,  H01M4/62 ,  H01M4/38 ,  H01M4/587 ,  H01M4/485 ,  H01M4/583 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a negative electrode active material comprising a mixture of a first negative electrode active material and a second negative electrode active material, wherein the first negative electrode active material has a hardness of 1 kg/mm2 to 10 kg/mm2 on the basis of the Vickers hardness standard, and the second negative electrode active material has a higher hardness than the first negative electrode active material. The negative electrode active material according to the present invention comprises a mixture of negative electrode active materials having different hardness so that pores of an active material layer are maintained in spite of a rolling process at the time of producing an negative electrode, and the pores acting as an electrolyte flow passage of an electrode can effectively be secured, thereby producing a lithium secondary battery having excellent battery performance by lowering resistance when a battery is charged or discharged.

公开(公告)号：US10734688B2

公开(公告)日：2020-08-04

申请号：US15405359

申请日：2017-01-13

Applicant: LG Chem, Ltd.

Inventor： Oh Byong Chae ,  Su Min Lee ,  Eun Kyung Kim ,  Sun Young Shin

IPC: H01M10/44 ,  H02J7/00 ,  G01R31/385 ,  G01R31/389 ,  H01M10/0525 ,  H01M10/052

Abstract: A charging and discharging method for a lithium secondary battery is provided, wherein, while charging or discharging the lithium secondary battery using a constant current, the charge current or allowable discharge current is modified by measuring the internal resistance of the lithium secondary battery. In the charging and discharging method for a lithium secondary battery according to the present disclosure, the charging time and charge capacity, or the discharge current amount and discharge capacity, may be appropriately harmonized, and thus the method may be usefully used as a charging method and a discharging method for a lithium secondary battery.

公开(公告)号：US10431829B2

公开(公告)日：2019-10-01

申请号：US15303983

申请日：2015-10-14

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Sun Young Shin ,  Su Yeon Lee ,  Eun Kyung Kim

IPC: H01M4/13 ,  H01M4/62 ,  H01M4/587 ,  H01M4/133 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/36 ,  H01M10/0525

Abstract: The present invention relates to a negative electrode active material for secondary batteries, and a negative electrode, an electrode assembly and a secondary battery including the same. The negative electrode active material includes polyhedral crystalline carbon, a first surface treatment layer disposed on a surface of the crystalline carbon and including amorphous carbon or oxidized crystalline carbon, and a second surface treatment layer disposed on a surface of the first surface treatment layer and including a polyacrylic acid ester copolymer, thereby improving output characteristics of batteries based on increased mobility of electrons resulting from surface-to-surface contact between active materials, controlling reactivity with an electrolyte, and enhancing high-temperature storage performance of batteries.

公开(公告)号：US10177380B2

公开(公告)日：2019-01-08

申请号：US14767655

申请日：2014-12-19

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Dong Sub Jung ,  Eun Kyung Kim ,  Sang Wook Woo ,  Sun Young Shin

IPC: H01M4/587 ,  H01M4/36 ,  H01M10/052 ,  H01G11/24 ,  H01G11/38 ,  H01G11/50 ,  H01G11/32 ,  H01M4/133 ,  H01M4/02 ,  H01G11/28 ,  H01G11/42 ,  H01G11/06

Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.

公开(公告)号：US20180212238A1

公开(公告)日：2018-07-26

申请号：US15746322

申请日：2017-05-19

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Sun Young Shin ,  Eun Kyung Kim ,  Su Yeon Lee ,  Lilin Piao

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/133

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/587 ,  H01M4/621 ,  H01M4/625 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2220/20 ,  Y02E60/122

Abstract: The present invention relates to a composite negative electrode material for a secondary battery, and a negative electrode and a lithium secondary battery which include the same, and particularly to a composite negative electrode material for a secondary battery, which includes a graphene sheet, and two or more coating layers formed on both sides of the graphene sheet, wherein the two or more coating layers include at least one polymer coating layer and at least one pitch coating layer, and the graphene sheet and the two or more coating layers are included in a weight ratio of greater than 1:greater than 0.01 to less than 0.1, and a negative electrode and a lithium secondary battery which include the same.

公开(公告)号：US20170092956A1

公开(公告)日：2017-03-30

申请号：US15271392

申请日：2016-09-21

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Sun Young Shin ,  Oh Byong Chae ,  Eun Kyung Kim

IPC: H01M4/74 ,  H01M10/0525 ,  H01M4/66

CPC classification number: H01M4/74 ,  H01M4/661 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/8684

Abstract: Provided is a metal mesh foil for a current collector of a lithium secondary battery having a hydrophobic deposition layer formed on a surface thereof, wherein the hydrophobic deposition layer is a deposition layer, in which a hydrophobic material is deposited, and has a thickness of 1 Å to 100 Å.