公开(公告)号：US20210013514A1

公开(公告)日：2021-01-14

申请号：US16980701

申请日：2019-04-03

Applicant: LG CHEM, LTD.

Inventor： Jong-Keon YOON ,  Sol-Ji PARK ,  Hyun-Woong YUN ,  Kyoung-Ho AHN ,  Hoe-Jin HAH

IPC: H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M2/16 ,  H01M10/0565 ,  H01M10/0562 ,  C08G61/04 ,  C08K7/00 ,  C08K3/38

Abstract: A lithium metal secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a protective layer interposed between the negative electrode and the separator. The protective layer includes an additive, wherein the additive comprises a mixture of hexagonal boron nitride (BN) flakes with an ionomer having a sulfur (S)-containing anionic group and fluorine (F).

公开(公告)号：US20190267661A1

公开(公告)日：2019-08-29

申请号：US16348372

申请日：2018-09-03

Applicant: LG CHEM, LTD.

Inventor： Jun-Hyeok HAN ,  Kyoung-Ho AHN ,  Sol-Ji PARK ,  Chul-Haeng LEE

IPC: H01M10/058 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/131 ,  H01M10/44 ,  G01R31/389

Abstract: A method for manufacturing an electrochemical device includes a discharge pretreatment step, where, external electric power is applied to a battery to discharge the battery, before charging the battery for the first time to perform formation of the battery, in order to remove a byproduct layer on the surface of a negative electrode. The method including the discharge pretreatment step before the first charge of a battery can improve the cycle life of an electrochemical device.