公开(公告)号：US20210104748A1

公开(公告)日：2021-04-08

申请号：US16982093

申请日：2019-10-31

Applicant: LG CHEM, LTD.

Inventor： Eunkyung PARK ,  Minchul JANG ,  Bora JUNG ,  Byoungkuk SON

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/38 ,  H01M4/525

Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode, a lithium metal layer, and an electrolyte disposed between the positive electrode and the negative electrode. The negative electrode comprises a first protective layer formed on a negative electrode current collector, a second protective layer formed on the first protective layer opposite the negative electrode current collector, and a third protective layer formed inside and on one surface of the second protective layer opposite the first protective layer, and wherein the lithium metal layer is formed between the negative electrode current collector and the first protective layer in the negative electrode when lithium ions migrate from the positive electrode after charging.

公开(公告)号：US20210087317A1

公开(公告)日：2021-03-25

申请号：US16954016

申请日：2019-05-08

Applicant: LG CHEM, LTD.

Inventor： Jeongae YOON ,  Sujee KWON ,  Bora JUNG ,  Sung Soo YOON ,  Byoungkuk SON ,  Eunkyung PARK ,  Minchul JANG

IPC: C08F259/08 ,  H01M4/04 ,  C08F214/22 ,  C09D127/16 ,  H01M4/66

Abstract: A polymer for an electrode protective layer including a polymer (A) including a fluorine-based polymer in which a monomer unit including poly(alkylene oxide) and a monomer unit including a curable functional group (e.g., a thermocurable functional group or a photocurable functional group) are grafted on the fluorine-based polymer, and when preparing an electrode by coating an electrode active material layer using the polymer and curing (e.g., thermally curing or photocuring) the result, excellent lithium ion conductivity is obtained since lithium ion flow is not inhibited, chemical resistance for an electrolyte liquid is high, and voltage stability of a secondary battery may be enhanced by suppressing side reactions with the electrolyte liquid occurring on an electrode active material surface due to properties of a uniform and flexible protective layer.

公开(公告)号：US20200321598A1

公开(公告)日：2020-10-08

申请号：US16636442

申请日：2018-08-17

Applicant: LG CHEM, LTD.

Inventor： Da Young SUNG ,  Se Ho PARK ,  Minchul JANG ,  Suk Il YOUN ,  Byoungkuk SON ,  Eunkyung PARK

IPC: H01M4/04 ,  H01M10/0562 ,  H01M4/62 ,  H01M4/13915 ,  H01M4/1393

Abstract: A method for manufacturing an electrode for an all solid battery including the steps of coating a current collector with a slurry including an active material, a conductive material, and a polyimide-based binder; and melting a solid electrolyte having a melting temperature of 50° C. to 500° C. and applying it onto the coating layer and an electrode manufactured therefrom.

公开(公告)号：US20200274146A1

公开(公告)日：2020-08-27

申请号：US16646370

申请日：2018-12-04

Applicant: LG CHEM, LTD.

Inventor： Suk Il YOUN ,  Byoungkuk SON ,  Junghun CHOI ,  Woongchul CHOI ,  Minchul JANG

IPC: H01M4/1395 ,  H01M4/66 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0565

Abstract: A lithium electrode and a lithium secondary battery including the same. By using an olefin-based ion conducting polymer as a protective layer-forming material of a lithium electrode having a protective layer formed on a lithium metal layer, the lithium electrode may be protected from moisture or open air during a lithium electrode preparation process, lithium dendrite formation and growth from the lithium electrode may be prevented, and performance of a battery using the lithium electrode may be enhanced.

公开(公告)号：US20200020934A1

公开(公告)日：2020-01-16

申请号：US16470149

申请日：2018-08-29

Applicant: LG CHEM, LTD. ,  CHUNG ANG UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

Inventor： Da Young SUNG ,  Myung Gil KIM ,  Minchul JANG ,  Yeilin HAM

IPC: H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  C01B21/097 ,  C01G51/00

Abstract: A method for preparing a positive electrode active material, a positive electrode active material prepared using the same, and a lithium secondary battery, and in particular, to a method for preparing a positive electrode active material comprising the steps of (a) preparing a coating composition including a precursor of metal-phosphorous-oxynitride; (b) forming a precursor layer on a positive electrode active material with the coating composition of (a) using a solution process; and (c) forming a metal-phosphorous-oxynitride protective layer on the positive electrode active material by heat treating the positive electrode active material having the precursor layer formed thereon. The method for preparing a positive electrode active material uses a solution process, which is advantageous in terms of simplifying the whole process and reducing costs, and high capacity, high stabilization and long lifetime are obtained as well by the formed protective layer having excellent properties.

公开(公告)号：US20190341601A1

公开(公告)日：2019-11-07

申请号：US16474303

申请日：2018-06-21

Applicant: LG CHEM, LTD.

Inventor： Eunkyung PARK ,  Minchul JANG ,  Suk Il YOUN ,  Byoungkuk SON ,  Junghun CHOI ,  Bora JUNG

IPC: H01M4/131 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/62 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  H01M4/66 ,  H01M4/40

Abstract: A lithium secondary battery which is made of an anode-free battery and includes lithium metal formed on a negative electrode current collector by charging. The lithium secondary battery includes the lithium metal formed on the negative electrode current collector in a state of being shielded from the atmosphere, so that the generation of a surface oxide layer (native layer) formed on the negative electrode according to the prior art does not occur fundamentally, thereby preventing the deterioration of the efficiency and life characteristics of the battery.

公开(公告)号：US20190245240A1

公开(公告)日：2019-08-08

申请号：US16093332

申请日：2017-09-21

Applicant: LG CHEM, LTD.

Inventor： Se Ho PARK ,  Chanyeup CHUNG ,  Da Young SUNG ,  Minchul JANG ,  Eunkyung PARK ,  Changhun PARK

IPC: H01M10/0562 ,  H01M10/0585 ,  H01M10/052 ,  C01D15/04

Abstract: The present invention relates to a Li-rich antiperovskite compound and the use thereof, and more particularly, to a Li-rich antiperovskite compound having a novel structure in which a dopant is substituted in a Li3OCl compound, wherein the dopant is substituted for an O site rather than an anionic Cl site, as known in the art, and an electrolyte using the same. The Li-rich antiperovskite compound has high lithium ion conductivity and excellent thermal stability, and thus can be applied as an electrolyte for lithium secondary batteries which are driven at a high temperature.

公开(公告)号：US20190131651A1

公开(公告)日：2019-05-02

申请号：US16093533

申请日：2017-09-15

Applicant: LG CHEM, LTD.

Inventor： Se Ho PARK ,  Da Young SUNG ,  Minchul JANG ,  Byoungkuk SON ,  Junghun CHOI

IPC: H01M10/052 ,  H01M4/1315 ,  H01M4/13915

Abstract: The present invention relates to a Li-rich antiperovskite-coated LCO-based lithium complex, a method of preparing the same, and a positive electrode active material and a lithium secondary battery, both of which include the LCO-based lithium complex. When a lithium complex in which a coating layer of a compound having a lithium-rich antiperovskite (LiRAP) crystal structure is formed on surfaces of LCO-based particles is applied as the positive electrode active material, the lithium complex is favorable for batteries which are operated at a high voltage, has high lithium ion conductivity, and can be applied to lithium secondary batteries which are driven at a high temperature due to high thermal stability.

公开(公告)号：US20170294688A1

公开(公告)日：2017-10-12

申请号：US15510565

申请日：2015-09-24

Applicant: LG CHEM, LTD.

Inventor： Minchul JANG ,  Byoungkuk SON ,  Seong Ho LEE ,  Junghun CHOI

IPC: H01M10/42 ,  H01M2/26 ,  H01M4/48 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/525

Abstract: The present specification relates to an anode, a lithium secondary battery including the same, a battery module including the lithium secondary battery, and a method for manufacturing an anode.

公开(公告)号：US20170104209A1

公开(公告)日：2017-04-13

申请号：US15315818

申请日：2015-06-15

Applicant: LG CHEM, LTD.

Inventor： Byoungkuk SON ,  Minchul JANG ,  Kiyoung KWON ,  Seong Ho LEE ,  Intae PARK ,  Changhun PARK ,  Junghun CHOI

IPC: H01M4/133 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M4/133 ,  H01M4/382 ,  H01M4/485 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/056 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0025 ,  Y02E60/122 ,  Y02T10/7011

Abstract: The present application relates to a lithium electrode and a lithium secondary battery including the same.