公开(公告)号：US12249703B2

公开(公告)日：2025-03-11

申请号：US17042514

申请日：2019-06-12

Applicant: LG CHEM, LTD.

Inventor： Su-Min Lee ,  Je-Young Kim ,  Sun-Young Shin ,  Yong-Ju Lee

IPC: H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode active material for a lithium secondary battery, including silicon oxide particles, wherein the silicon oxide has a full width at half maximum peak ranging between 2 and 6 in a particle size distribution and the silicon oxide particles have an average particle size (D50) of 1 μm to 20 μm, and a negative electrode and a lithium secondary battery comprising the same. The negative electrode active material according to the disclosure has outstanding life performance and output performance.

公开(公告)号：US11575123B2

公开(公告)日：2023-02-07

申请号：US16836554

申请日：2020-03-31

Applicant: LG CHEM, LTD.

Inventor： Sun-Young Shin ,  Dong-Hyuk Kim ,  Yong-Ju Lee ,  Je-Young Kim ,  Su-Min Lee

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M4/48 ,  H01M4/02

Abstract: A negative electrode which satisfies a need for high energy density while allowing high-speed charging of a battery. A lithium secondary battery including the negative electrode is also provided. The negative electrode includes: a first negative electrode active material having a first core including a silicon oxide-based composite and a carbon coating layer covering the first core including a silicon oxide-based composite; and a second negative electrode active material having a second core including an artificial graphite and a carbon coating layer covering the second core.

公开(公告)号：US10593930B2

公开(公告)日：2020-03-17

申请号：US14439524

申请日：2014-06-20

Applicant: LG Chem, Ltd.

Inventor： Yong-Ju Lee ,  Je-Young Kim ,  Mi-Rim Lee ,  Byung-Hun Oh ,  Seung-Youn Choi

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/62 ,  H01M10/052 ,  H01M4/38 ,  H01M4/46 ,  H01M4/134 ,  H01M10/42 ,  H01M4/02 ,  H01M4/587

Abstract: Disclosed is an electrode active material for a lithium secondary battery including a first material including a carbon material, a second material of a nanostructure formed on the first material, the second material including at least one selected from a metal and a metalloid capable of reversibly alloying with lithium, and a third material present on a surface of at least one of the first material and the second material to control a side reaction with an electrolyte solution, an electrode including the electrode active material, and a lithium secondary battery having the electrode.

公开(公告)号：US10297820B2

公开(公告)日：2019-05-21

申请号：US15547675

申请日：2015-12-15

Applicant: LG Chem, Ltd.

Inventor： Yoon-Ah Kang ,  Yong-Ju Lee ,  Eun-Kyung Kim

IPC: H01M4/82 ,  H01M4/38 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/485 ,  H01M4/587 ,  H01M10/052 ,  H01M4/02 ,  H01M4/48 ,  H01M4/583 ,  H01M10/054

Abstract: An anode active material and a method for preparing the same, wherein the anode active material has a core-shell structure having formula (MOx-Liy)-C (here, M is a metal (or metalloid), x is greater than 0 and less than 1.5, and y is greater than 0 and less than 4) and including a core part containing an alloy of a metal (or metalloid) oxide-Li (MOx-Liy) and a shell part containing a carbon material coated on a surface of the core part, wherein the shell part contains lithium in an amount less than 5 atm % in the surface and the inner portion thereof. The anode active material can provide high capacity, excellent cycle characteristics, excellent volume expansion control capability, and high initial efficiency.

公开(公告)号：US20140322601A1

公开(公告)日：2014-10-30

申请号：US14326582

申请日：2014-07-09

Applicant: LG CHEM, LTD.

Inventor： Yong-Ju Lee ,  Yoon-Ah Kang ,  Je-Young Kim ,  Seung-Youn Choi ,  Mi-Rim Lee ,  Hye-Ran Jung ,  Jung-Woo Yoo

IPC: H01M4/38

CPC classification number: H01M4/386 ,  H01M4/0471 ,  H01M4/0483 ,  H01M4/0488 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/48 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/027

Abstract: The anode active material of the present invention comprises silicon-based particles obtained from at least one of silicon, a silicon oxide and a silicon alloy, and the silicon-based particles have a faceted shape, thereby providing high capacity and good life characteristics without causing any deterioration which has been generated in the use of conventional silicon-based particles, and eventually providing a lithium secondary battery having such characteristics.

Abstract translation: 本发明的负极活性物质包含由硅，氧化硅，硅合金中的至少一种得到的硅系粒子，硅基粒子具有小面形状，能够提供高容量且寿命特性良好而不引起 在使用常规硅基颗粒时产生的任何劣化，并且最终提供具有这种特性的锂二次电池。

公开(公告)号：US20140170485A1

公开(公告)日：2014-06-19

申请号：US14185182

申请日：2014-02-20

Applicant: LG Chem, Ltd.

Inventor： Mi-Rim Lee ,  Yong-Ju Lee ,  Je-Young Kim ,  Hye-Ran Jung

IPC: C22C29/12 ,  H01M4/583

CPC classification number: C22C29/12 ,  H01M4/131 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/386 ,  H01M4/40 ,  H01M4/483 ,  H01M4/485 ,  H01M4/625 ,  H01M4/628 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54

Abstract: The present invention relates to a method for preparing an anode active material, comprising (S1) forming a shell being a coating layer comprising a carbon material on the surface of a core comprising silicon oxide particles, to obtain a silicon oxide-carbon composite having a core-shell structure; (S2) mixing the silicon oxide-carbon composite with an oxygen-containing lithium salt, followed by heat treatment to produce a silicon oxide-lithium alloy, thereby obtaining a (SiOx-Liy)—C (0

Abstract translation: 本发明涉及一种负极活性物质的制造方法，其特征在于，包括：（S1）在包含氧化硅粒子的芯的表面上形成由包含碳材料的涂层构成的外壳，得到氧化硅 - 碳复合体， 核心壳结构; （S2）将氧化硅 - 碳复合物与含氧锂盐混合，然后进行热处理以制备氧化硅 - 锂合金，从而获得（SiO x-Li y）-C（0

公开(公告)号：US11962003B2

公开(公告)日：2024-04-16

申请号：US17271861

申请日：2020-01-21

Applicant: LG CHEM, LTD.

Inventor： Su-Min Lee ,  Je-Young Kim ,  Se-Mi Park ,  Yong-Ju Lee

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/386 ,  H01M4/366 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery which includes: silicon particles; and a coating layer surrounding respective silicon particles, wherein the silicon particles have a full width at half maximum (FWHM) of peak ranging from 2 to 10 in the particle diameter distribution having an average particle diameter (D50) of 1 μm to 30 μm, and the coating layer includes at least one selected from the group consisting of carbon and a polymer. A negative electrode and lithium secondary battery including the negative electrode active material are also disclosed.

公开(公告)号：US11569495B2

公开(公告)日：2023-01-31

申请号：US16626462

申请日：2019-01-30

Applicant: LG CHEM, LTD.

Inventor： Sun-Young Shin ,  Je-Young Kim ,  Yong-Ju Lee ,  Jung-Hyun Choi

IPC: H01M4/587 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/02

Abstract: The present disclosure relates to a negative electrode material that may be used as a negative electrode active material. The negative electrode material includes a silicon oxide material containing a metal (M)-silicate and a carbonaceous material. According to an embodiment of the present disclosure, the negative electrode material may include the silicon oxide material containing a metal (M)-silicate and the carbonaceous material mixed with each other at a predetermined ratio. The negative electrode active material according to the present disclosure comprises a composite of a carbonaceous material having a broad particle size distribution with a metal-silicate, and thus provides improved electrical conductivity and life characteristics.

公开(公告)号：US10199640B2

公开(公告)日：2019-02-05

申请号：US15103479

申请日：2014-12-12

Applicant: LG Chem, Ltd.

Inventor： Keiko Matsubara ,  Yoshiyuki Igarashi ,  Mi-Rim Lee ,  Hye-Ran Jung ,  Yong-Ju Lee

IPC: H01M4/36 ,  H01M4/134 ,  H01M4/38 ,  C01B33/00 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: Alloy particles for negative electrode active material are proposed, which can impart anti-oxidation property to Si-containing alloy particles, and suppress oxidation of the negative electrode active material due to electrolyte at a considerably high level. A negative electrode material of secondary battery is achieved by a negative electrode material of secondary battery which is capable of intercalating and de-intercalating lithium and which consists of alloy particles including a silicon phase, a metal phase and bismuth, in which a crystallite size of the silicon phase is 10 nm or smaller, and the metal phase includes at least one kind of metal alloying with silicon but not with lithium, and the negative electrode material includes primary particles formed at least by the silicon and the metals.

公开(公告)号：US12107261B2

公开(公告)日：2024-10-01

申请号：US16646405

申请日：2019-05-03

Applicant: LG CHEM, LTD.

Inventor： Su-Min Lee ,  Je-Young Kim ,  Il-Geun Oh ,  Yong-Ju Lee

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/362 ,  H01M4/485 ,  H01M4/621 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery including complex particles including silicon oxide particles doped with a metal of lithium, magnesium, calcium or aluminum, a linear conductive material disposed between the doped silicon oxide particles, and a carbon-based binder that hinds the doped silicon oxide particles and the conductive material together. The carbon-based binder is a result of sintering a carbon-based precursor. A method of preparing the negative electrode active material, a negative electrode and a lithium secondary battery are also provided. The negative electrode active material according to the present disclosure is superior at least in initial efficiency and life characteristics.