公开(公告)号：US20210359294A1

公开(公告)日：2021-11-18

申请号：US17277279

申请日：2020-07-27

Applicant: LG CHEM, LTD.

Inventor： Hee Jin KIM ,  Kwan Soo LEE

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/04

Abstract: The present invention relates to a cathode for a lithium secondary battery, a manufacturing method therefor, and a lithium secondary battery comprising the cathode. The cathode for a lithium secondary battery comprises a cathode active material layer formed to contain a very low content of conductive material at the outermost side thereof, whereby the cathode can have high thermal stability when an internal short-circuit of a battery occurs, and can achieve high-power properties when applied to a secondary battery.

公开(公告)号：US20210359288A1

公开(公告)日：2021-11-18

申请号：US17274111

申请日：2020-07-28

Applicant: LG CHEM, LTD.

Inventor： Seongmo KOO ,  Kwan Soo LEE ,  Jaekyo NOH

IPC: H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/36 ,  H01M50/46 ,  H01M50/531

Abstract: The present disclosure relates to a jelly-roll type electrode assembly in which a long sheet-type cathode and a long sheet-type anode are wound in a state where a separator is interposed between the cathode and the anode, wherein the anode is configured such that an anode mixture is formed on both sides of an anode current collector, and the anode current collector is configured such that when winding to form an electrode assembly, if a side that winds inward is referred to a first side and a side that winds outward is referred to a second side, an active material of a first anode mixture coated on the first side contains 70 wt % or more artificial graphite as an active material based on the total weight of the active material, and an active material of a second anode mixture coated on the second side contains 70 wt % or more natural graphite as an active material based on the total weight of the active material.

公开(公告)号：US20140106237A1

公开(公告)日：2014-04-17

申请号：US14136217

申请日：2013-12-20

Applicant: LG Chem, Ltd.

Inventor： Kwan Soo LEE ,  Cha Hun KU ,  Duk Hyun RYU ,  Jung Jin KIM ,  Byung Kyu JUNG

IPC: H01M4/62 ,  H01M10/052 ,  H01M10/0567

CPC classification number: H01M4/622 ,  H01M4/13 ,  H01M4/621 ,  H01M4/624 ,  H01M10/052 ,  H01M10/0567 ,  H01M2004/027

Abstract: The present invention relates to a lithium secondary battery. The present invention provides the lithium secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode includes a water-dispersible binder and a conduction agent. The non-aqueous electrolyte solution includes fluoroethylenecarbonate (FEC). The batteries of the present invention are advantageous in that they have a high efficiency charging lifespan characteristic and enable high capacity charging in a short time.

Abstract translation: 锂二次电池技术领域本发明涉及锂二次电池。 本发明提供了包括正极，负极和非水电解质溶液的锂二次电池。 负极包括水分散性粘合剂和导电剂。 非水电解质溶液包括氟代乙烯碳酸酯（FEC）。 本发明的电池的优点在于它们具有高效率的充电寿命特性，并且能够在短时间内实现高容量充电。