公开(公告)号：US11211595B2

公开(公告)日：2021-12-28

申请号：US16966269

申请日：2019-03-06

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Je Young Kim

IPC: H01M4/04 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

Abstract: A method for manufacturing a negative electrode, the method including immersing a preliminary negative electrode in a pre-lithiation solution, the pre-lithiation solution including a lithium organic compound and a pre-lithiation solvent, taking the preliminary negative electrode out of the pre-lithiation solution and then removing pre-lithiation solvent present in the preliminary negative electrode, wherein the preliminary negative electrode includes a current collector and a preliminary negative electrode active material layer on the current collector, the preliminary negative electrode active material layer includes a negative electrode active material, and a standard reduction potential of the lithium organic compound is lower than a standard reduction potential of the negative electrode active material.

公开(公告)号：US11183683B2

公开(公告)日：2021-11-23

申请号：US16482062

申请日：2018-07-27

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Yoon Ah Kang ,  Jun Hyuk Song ,  Eun Kyung Kim ,  Sang Wook Woo

IPC: H01M4/00 ,  H01M4/139 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

Abstract: A method of pre-lithiating an electrode for a secondary battery, the method including: a first step of bringing a lithium metal into direct contact with an electrode in an electrolyte and applying pressure to the electrode to prepare a pre-lithiated electrode; and a second step of removing the lithium metal and then applying pressure to the pre-lithiated electrode to perform a stabilization process. The electrode for the secondary battery after going through the pre-lithiation can relieve volume change of the electrode and reduce contact loss of the electrode.

公开(公告)号：US10581069B2

公开(公告)日：2020-03-03

申请号：US15034666

申请日：2015-08-26

Applicant: LG Chem, Ltd.

Inventor： Hyun Wook Kim ,  Eun Kyung Kim ,  Sang Wook Woo

IPC: H01M4/13 ,  H01M4/60 ,  H01M4/58 ,  H01M4/82 ,  H01M6/00 ,  H01M4/36 ,  H01M4/587 ,  H01M4/1393 ,  C01B32/05 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a negative electrode active material having a double coating layer of a first coating layer and a second coating layer, which has an excellent output property, effectively suppresses a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and has excellent electric conductivity, a method for manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the negative electrode. The negative electrode active material according to the present invention is capable of effectively preventing a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and is capable of improving electric conductivity, and as a result, enhancing a rate determining property by reducing an OCV drop of a lithium secondary battery including the negative electrode active material, and enhancing a high rate property.

公开(公告)号：US10573925B2

公开(公告)日：2020-02-25

申请号：US15768891

申请日：2017-06-16

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Hee Won Choi ,  Eun Kyung Kim

IPC: H01M10/058 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/643 ,  H01M10/04 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/02 ,  H01M10/052

Abstract: The present invention relates to an electrode for a secondary battery, comprising an electrode current collector and a lithium metal layer disposed on one surface of the electrode current collector, wherein a thickness difference between the thinnest portion and the thickest portion of the lithium metal layer is 1,000 pm or less, and a method of manufacturing the same.

公开(公告)号：US09979024B2

公开(公告)日：2018-05-22

申请号：US14540335

申请日：2014-11-13

Applicant: LG Chem, Ltd.

Inventor： Sang Wook Woo ,  Ji Heon Ryu ,  Eun Kyung Kim ,  Je Young Kim ,  Sang Jo An ,  Min Young Hong

IPC: H01M4/58 ,  H01M4/36 ,  C01B25/42 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  C01B25/42 ,  H01M4/366 ,  H01M4/625 ,  H01M10/0525 ,  Y02T10/7011

Abstract: Provided is an anode active material including a transition metal-pyrophosphate of Chemical Formula 1 below: M2P2O7   where M is any one selected from the group consisting of titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), palladium (Pd), and silver (Ag), or two or more elements thereof. Since the anode active material of the present invention is stable and has excellent conversion reactivity while including only transition metal and phosphate without using lithium in which the price thereof is continuously increased, the anode active material of the present invention may improve capacity characteristics.

公开(公告)号：US09960427B2

公开(公告)日：2018-05-01

申请号：US14320745

申请日：2014-07-01

Applicant: LG Chem, Ltd.

Inventor： Sun Young Shin ,  Sang Wook Woo ,  Eun Kyung Kim ,  Je Young Kim ,  Hyun Wook Kim ,  Su Min Lee

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/133 ,  H01M4/131 ,  H01M4/485 ,  H01M4/587 ,  H01M10/052

CPC classification number: H01M4/625 ,  H01M4/0402 ,  H01M4/131 ,  H01M4/133 ,  H01M4/485 ,  H01M4/587 ,  H01M10/052 ,  H01M2220/30

Abstract: The present invention relates to a conductive material for a secondary battery, including a pitch coated graphene sheet, an anode for a secondary battery including the same, and a lithium secondary battery including the electrode.

公开(公告)号：US09719905B2

公开(公告)日：2017-08-01

申请号：US14331510

申请日：2014-07-15

Applicant: LG Chem, Ltd.

Inventor： Eun Kyung Kim ,  Sun Young Shin ,  Je Young Kim ,  Sang Wook Woo

IPC: G01N9/36 ,  G01N23/207 ,  H01M4/133

CPC classification number: G01N9/36 ,  G01N23/207 ,  G01N2223/633 ,  G01N2223/649

Abstract: Provided is a method for non-destructively measuring an electrode density and an electrode porosity of an electrode active material coated on an electrode base material using X-ray diffraction. According to the methods of the present invention, a value of Ipeak in parallel direction/Ipeak in perpendicular direction of the electrode active material is obtained by X-ray diffraction and an electrode density and an electrode porosity are calculated according to previously obtained correlations between the electrode density and Ipeak in parallel direction/Ipeak in perpendicular direction and between the electrode porosity and Ipeak in parallel direction/Ipeak in perpendicular direction.

公开(公告)号：US20170170465A1

公开(公告)日：2017-06-15

申请号：US15034666

申请日：2015-08-26

Applicant: LG CHEM, LTD.

Inventor： Hyun Wook Kim ,  Eun Kyung Kim ,  Sang Wook Woo

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

CPC classification number: H01M4/366 ,  C01B32/05 ,  H01M4/1393 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/027 ,  Y02T10/7011

Abstract: The present invention relates to a negative electrode active material having a double coating layer of a first coating layer and a second coating layer, which has an excellent output property, effectively suppresses a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and has excellent electric conductivity, a method for manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the negative electrode. The negative electrode active material according to the present invention is capable of effectively preventing a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and is capable of improving electric conductivity, and as a result, enhancing a rate determining property by reducing an OCV drop of a lithium secondary battery including the negative electrode active material, and enhancing a high rate property.

公开(公告)号：US20160276672A1

公开(公告)日：2016-09-22

申请号：US15032396

申请日：2015-09-23

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk Song ,  Eun Kyung Kim ,  Sang Wook Woo ,  Sung Bin Park ,  Ye Ri Kim ,  Ju Ho Chung

IPC: H01M4/62 ,  H01M10/0525 ,  C23C16/56 ,  H01M4/04 ,  H01M4/36 ,  H01M4/485

CPC classification number: H01M4/628 ,  C01D15/02 ,  C01G23/005 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/82 ,  C23C16/56 ,  H01M4/0471 ,  H01M4/0492 ,  H01M4/366 ,  H01M4/485 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  Y02T10/7011

Abstract: A negative active material for rechargeable lithium secondary batteries, a method of preparing the same, and a rechargeable lithium secondary battery including the same are disclosed. The negative active material includes a core including a lithium titanium oxide of Formula 1, and a coating layer positioned on a surface of the core and including an acid anhydride physisorbed onto the core, and thus can be useful in inhibiting battery side reactions and gas generation and improving battery performance since moisture formed during a redox reaction is effectively absorbed into a surface of the negative active material. LixTiyO4  [Formula 1] In Formula 1, x and y are as defined in the detailed description.

Abstract translation: 在式1中，x和y如在详细描述中所定义。

公开(公告)号：US20160276657A1

公开(公告)日：2016-09-22

申请号：US15035635

申请日：2015-07-27

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk Song ,  Eun Kyung Kim ,  Dong Sub Jung ,  Sang Wook Woo ,  Ye Ri Kim ,  Ju Ho Chung

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

CPC classification number: H01M4/366 ,  C01B32/20 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/40 ,  H01M4/133 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present disclosure relates to a secondary graphite particle comprising an initial natural graphite particle of excellent high capacity and output characteristic, aggregated, bonded or assembled with an initial artificial graphite particle of excellent cycle characteristic and swelling characteristic, thus having superior rollability that leads into increased density, a negative electrode using the secondary graphite particle as a negative electrode active material, and a secondary lithium battery comprising the negative electrode. Accordingly, the secondary lithium battery comprising the secondary graphite particle as described above as the negative electrode active material has an effect of enhanced high rate charging and discharging capability, cycle characteristic and swelling characteristic.

Abstract translation: 本公开内容涉及二次石墨颗粒，其包含具有优异的高容量和输出特性的初始天然石墨颗粒，其具有优异的循环特性和溶胀特性的初始人造石墨颗粒聚集，结合或组装，因此具有优异的滚动性，导致增加 使用二次石墨粒子作为负极活性物质的负极和包含负极的二次锂电池。 因此，包含上述作为负极活性物质的二次石墨粒子的二次锂电池具有提高高速充放电能力，循环特性和溶胀特性的效果。