公开(公告)号：US20210066752A1

公开(公告)日：2021-03-04

申请号：US16962201

申请日：2019-10-31

Applicant: LG CHEM, LTD.

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

IPC: H01M10/0565 ,  H01M10/0525

Abstract: A lithium secondary battery including a negative electrode, a positive electrode, a first electrolyte layer facing the negative electrode; and a second electrolyte layer present on the first electrolyte layer, wherein the first electrolyte layer has a higher ion conductivity than the second electrolyte layer, and a lithium secondary battery comprising the electrolyte described above.

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：US20210083250A1

公开(公告)日：2021-03-18

申请号：US16644624

申请日：2018-12-17

Applicant: LG CHEM, LTD.

Inventor： Suk Il YOUN ,  Minchul JANG ,  Byoungkuk SON ,  Yeilin HAM ,  Da Young SUNG

IPC: H01M2/16 ,  H01M10/0525

Abstract: A porous separator including a porous layer including plate-type inorganic particles, and a first binder polymer located on a part of or all surfaces of the plate-type inorganic particles, wherein the first binder polymer connects and fixes the plate-type inorganic particles, and an electrochemical device including the same.

公开(公告)号：US20210028484A1

公开(公告)日：2021-01-28

申请号：US17040500

申请日：2019-10-31

Applicant: LG CHEM, LTD.

Inventor： Eunkyung PARK ,  Minchul JANG ,  Suk Il YOUN ,  Byoungkuk SON ,  Changhun PARK ,  Doyeon KIM ,  Bora JUNG ,  Yeilin HAM

IPC: H01M10/052 ,  H01M4/38 ,  H01M4/525 ,  H01M4/505 ,  C01G51/00 ,  C01G53/00

Abstract: A lithium secondary battery including a positive electrode, a negative electrode comprising a negative electrode current collector, and an electrolyte disposed between the positive electrode and the negative electrode; and a lithium metal layer on the negative electrode current collector in the negative electrode. The electrolyte includes a first electrolyte layer and a second electrolyte disposed on the first electrolyte layer, wherein the first electrolyte layer faces the negative electrode, and the second electrolyte layer faces the positive electrode. The first electrolyte layer has higher ion conductivity than the second electrolyte layer, and wherein the lithium metal layer is formed by migration of lithium ions from the positive electrode after charging.