公开(公告)号：US12206070B2

公开(公告)日：2025-01-21

申请号：US17265400

申请日：2019-10-30

Applicant: LG CHEM, LTD.

Inventor： Insung Uhm ,  Yohan Kwon ,  Eunkyung Park ,  Jae Hyun Lee ,  Minchul Jang ,  Byoungkuk Son ,  Seongmin Ha

IPC: H01M10/0567 ,  H01M4/04 ,  H01M4/139 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0568 ,  H01M10/44

Abstract: A lithium secondary battery including a positive electrode, a negative electrode comprising a negative electrode current collector, and an electrolyte interposed between the positive electrode and negative electrode. The lithium metal is formed on the negative electrode current collector by lithium ions migrating toward the negative electrode current collector after charge. The electrolyte comprises a sacrificial salt having an oxidation potential of 5 V or less with respect to lithium. The lithium secondary battery forms lithium metal while being blocked from the atmosphere, and thereby improves an existing problem caused by high reactivity of lithium metal. By including a sacrificial salt in an electrolyte, lithium consumption caused by an irreversible reaction of a negative electrode is reduced, which may prevent decline in the battery capacity and lifetime properties.

公开(公告)号：US11978852B2

公开(公告)日：2024-05-07

申请号：US16975333

申请日：2019-10-31

Applicant: LG CHEM, LTD.

Inventor： Eunkyung Park ,  Minchul Jang ,  Bora Jung ,  Suk Il Youn ,  Byoungkuk Son

IPC: H01M10/0565 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M10/0565 ,  H01M4/626 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2300/0022 ,  H01M2300/0082

Abstract: A lithium electrode and a lithium secondary battery including the same, which includes a first protective layer and a second protective layer sequentially formed on at least one surface of lithium metal layer. The second protective layer contains a cross-linked ion conductive electrolyte in the interior and on the surface of the electrically conductive matrix, and thus the first protective layer has higher ion conductivity than the second protective layer, thereby preventing electrons from being concentrated into lithium dendrites formed from the lithium metal to inhibit the growth of lithium dendrites, and at the same time, physically inhibiting the growth of lithium dendrites by the second protective layer.

公开(公告)号：US11870078B2

公开(公告)日：2024-01-09

申请号：US16971247

申请日：2019-10-30

Applicant: LG CHEM, LTD.

Inventor： Eunkyung Park ,  Bora Jung ,  Minchul Jang ,  Suk Il Youn ,  Byoungkuk Son

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M4/628 ,  H01M4/134 ,  H01M4/382 ,  H01M4/626 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2300/0037 ,  H01M2300/0082 ,  H01M2300/0091

Abstract: A lithium electrode includes a protective layer containing an ion conductive electrolyte in the interior and on the surface of the electrically conductive matrix. The protective layer may make the electrical conductivity of the surface of the lithium electrode uniform, imparts strength during the growth of lithium dendrites, physically prevents the growth of lithium dendrites, and suppresses the generation of dead lithium.

公开(公告)号：US11557750B2

公开(公告)日：2023-01-17

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 ,  H01M4/13915 ,  H01M4/1393 ,  H01M4/62 ,  H01M10/0562 ,  H01M4/02

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：US11322731B2

公开(公告)日：2022-05-03

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 ,  H01M4/04 ,  H01M4/36 ,  H01M4/40 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02

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：US10957911B2

公开(公告)日：2021-03-23

申请号：US16089978

申请日：2017-09-07

Applicant: LG CHEM, LTD.

Inventor： Byoungkuk Son ,  Minchul Jang ,  Junghun Choi ,  Da Young Sung ,  Se Ho Park

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/38 ,  H01M10/052 ,  H01M10/42 ,  H01M4/02

Abstract: The present invention relates to a negative electrode including a multi-protective layer and a lithium secondary battery including the same. The multi-protective layer is capable of effectively transferring lithium ions to a lithium metal electrode while physically suppressing lithium dendrite growth on the electrode surface, and does not cause an overvoltage during charge and discharge since the protective layer itself does not function as a resistive layer due to excellent ion conductivity of the multi-protective layer, and therefore, is capable of preventing battery performance decline and securing stability during battery operation.

公开(公告)号：US11518836B2

公开(公告)日：2022-12-06

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 ,  C08F214/22 ,  C09D127/16 ,  H01M4/04 ,  H01M4/66 ,  C09D151/00 ,  H01M4/02 ,  H01M4/62 ,  H01M4/36 ,  H01M4/13

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：US11322777B2

公开(公告)日：2022-05-03

申请号：US16093342

申请日：2017-09-28

Applicant: LG CHEM, LTD.

Inventor： Changhun Park ,  Minchul Jang ,  Byoungkuk Son ,  Eunkyung Park ,  Junghun Choi

IPC: H01M10/0565 ,  H01M10/052 ,  H01M10/0569 ,  H01M4/40 ,  H01M4/38 ,  H01M10/0566 ,  H01M50/431 ,  H01M4/02 ,  H01M4/36

Abstract: The present invention relates to a lithium secondary battery, and in particular, to a lithium secondary battery including a positive electrode, a negative electrode, and a separator and an electrolyte interposed between the positive electrode and the negative electrode, wherein a gel polymer electrolyte is included between the negative electrode and the separator, and a liquid electrolyte is included between the positive electrode and the separator.
The lithium secondary battery according to the present invention uses a different electrolyte in each of a positive electrode and a negative electrode improving stability and performance of the electrodes, and as a result, performance and a life time of the lithium secondary battery may be enhanced.

公开(公告)号：US11056725B2

公开(公告)日：2021-07-06

申请号：US16329076

申请日：2017-11-08

Applicant: LG CHEM, LTD.

Inventor： Byoungkuk Son ,  Minehul Jang ,  Eunkyung Park ,  Junghun Choi

IPC: H01M10/42 ,  H01M4/36 ,  H01M4/62 ,  H01M4/131 ,  H01M4/46 ,  H01M4/38 ,  H01M12/08 ,  H01M4/485 ,  H01M10/052 ,  H01M4/583 ,  H01M4/133 ,  H01M4/134 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

Abstract: An electrode and a lithium secondary battery comprising the same, in particularly an electrode comprising an electrode layer, a pre-lithiation prevention layer formed on the electrode layer, and a lithium layer formed on the pre-lithiation prevention layer, which is capable of greatly improving the problem of the reduction of irreversible capacity of a negative electrode while preventing fire caused by a lithiation reaction due to contact between lithium and silicon before assembling a cell, and a lithium secondary battery including the same.

公开(公告)号：US10862130B2

公开(公告)日：2020-12-08

申请号：US16202946

申请日：2018-11-28

Applicant: LG CHEM, LTD.

Inventor： Byoungkuk Son ,  Minchul Jang ,  Min Seo Kim ,  Da Young Sung ,  Seong Ho Lee

IPC: H01M4/62 ,  H01M4/13 ,  H01M4/38 ,  H01M10/052 ,  H01M4/04 ,  H01M4/40 ,  H01M10/0568 ,  H01M4/136

Abstract: The present application relates to a cathode for a lithium-sulfur battery and a method of preparing the same. More specifically, the cathode for a lithium-sulfur battery according to an exemplary embodiment of the present application includes: a cathode active part including a sulfur-carbon composite; and a cathode coating layer including an amphiphilic polymer provided on at least one portion of a surface of the cathode active part and including a hydrophilic portion and a hydrophobic portion.