公开(公告)号：US20240186501A1

公开(公告)日：2024-06-06

申请号：US17924465

申请日：2022-04-19

Applicant: LG Energy Solution, Ltd.

Inventor： Kyu Tae Park ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo

IPC: H01M4/525 ,  C08K3/04 ,  C08K3/22 ,  C09D5/24 ,  C09D7/61 ,  C09D7/80 ,  C09D127/16 ,  H01M4/505

CPC classification number: H01M4/525 ,  C09D5/24 ,  C09D7/61 ,  C09D7/80 ,  C09D127/16 ,  H01M4/505 ,  C08K3/041 ,  C08K2003/2293 ,  C08K2003/2296 ,  C08K2201/001 ,  C08K2201/011 ,  C08K2201/014

Abstract: A pre-dispersion for a positive electrode and a positive electrode slurry for a lithium secondary battery containing the same are disclosed herein. In some embodiments, a pre-dispersion comprises a positive electrode additive represented by the following Chemical Formula 1, a first conductive material, a binder:


LipCo(1-q)M1qO4  [Chemical Formula 1]



wherein M1 is one or more elements selected from the group consisting of W, Cu, Fe, V, Cr, Ti, Zr, Zn, Al, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, 5≤p≤7, and 0≤q≤0.5. Dispersibility and workability of the positive electrode additive in the positive electrode slurry are improved. Side reactions that may be generated in the preparation of the positive electrode slurry can be suppressed while minimizing the loss of the positive electrode additive, so that the electrical properties of the electrodes manufactured using the same are improved.

公开(公告)号：US20230387413A1

公开(公告)日：2023-11-30

申请号：US18031387

申请日：2022-06-02

Applicant: LG Energy Solution, Ltd.

Inventor： Chi Ho Jo ,  Wang Mo Jung ,  Hye Hyeon Kim ,  Tae Gu Yoo ,  Jin Tae Hwang ,  Hae Jung Jung ,  Jong Wook Heo

IPC: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/36 ,  H01M4/48 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133 ,  H01M10/44 ,  H01M10/0525

CPC classification number: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/364 ,  H01M4/483 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133 ,  H01M10/44 ,  H01M10/0525 ,  H01M2004/028

Abstract: A lithium secondary battery and a method of manufacturing the lithium secondary battery are provided. In the lithium secondary battery, a positive electrode additive represented by Formula 1 as an irreversible additive is included in a positive electrode mixture layer, and a ratio (CC/DC) of an initial charge capacity (CC) to an initial discharge capacity (DC) is adjusted within a specific range, thereby reducing the amount of oxygen gas generated in the charging/discharging of the lithium secondary battery, and at the same time, inhibiting self-discharging and improving an operating voltage by improving the open circuit voltage of the battery in initial activation and/or subsequent high-temperature storage. The lithium secondary battery including the same can be effectively used as a power source for mid-to-large devices such as electric vehicles.

公开(公告)号：US20240014379A1

公开(公告)日：2024-01-11

申请号：US18025580

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Gwang Yeon Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo

IPC: H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/36

CPC classification number: H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/0435 ,  H01M10/0525 ,  H01M4/364 ,  H01M4/366 ,  H01M2004/028

Abstract: Provided is a positive electrode for a lithium secondary battery with improved structural stability, a manufacturing method thereof, and a lithium secondary battery including the same. When the positive electrode containing a positive electrode additive is manufactured, the conditions of first and second rolling operations are controlled so that there is an advantage in that structures and electrical properties of a first mixture layer and a second mixture layer can be improved.

公开(公告)号：US20230369602A1

公开(公告)日：2023-11-16

申请号：US18025980

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Ji Hye Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/62 ,  H01M4/131

CPC classification number: H01M4/628 ,  H01M4/131 ,  H01M2004/028

Abstract: The present technology relates to a positive electrode additive for a lithium secondary battery and a positive electrode for a lithium secondary battery including the same, wherein the positive electrode additive contains a carbon material on a surface of a lithium cobalt oxide represented by Chemical Formula 1 to improve the low electrical conductivity of the positive electrode additive, and an effect of improving the problem caused by the amount of gases generated during initial charging and discharging (i.e., “activation”) is excellent, and thus a positive electrode and lithium secondary battery including the positive electrode additive have excellent electrical performance.

公开(公告)号：US20240030427A1

公开(公告)日：2024-01-25

申请号：US18025501

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sil Kang ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/62 ,  H01M4/04

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/623 ,  H01M4/625 ,  H01M4/0404 ,  H01M2004/028

Abstract: A positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and a method of making the same are disclosed herein. In some embodiments, a positive electrode includes a current collector, a first mixture layer, and a second mixture layer that are sequentially stacked, wherein the first mixture layer includes a first binder composed of a rubber-based resin, and wherein the second mixture layer includes a second binder composed of a fluorine-based resin derived from a fluorine (F)-containing monomer. By using a first binder exhibiting more hydrophobicity than a second binder adhesive strength between a positive electrode current collector and the mixture layer, and durability of the positive electrode, can be improved. When the first mixture layer contains a positive electrode additive, damage to the positive electrode can be minimized, and the electrical performance and lifetime of the lithium secondary battery can be improved.

公开(公告)号：US20230343948A1

公开(公告)日：2023-10-26

申请号：US18023777

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Su Min Lee ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/587 ,  H01M4/133 ,  H01M4/38 ,  H01M4/134 ,  H01M10/052 ,  H01M4/525

CPC classification number: H01M4/505 ,  H01M4/131 ,  H01M4/587 ,  H01M4/133 ,  H01M4/386 ,  H01M4/134 ,  H01M10/052 ,  H01M4/525

Abstract: An electrode assembly for a lithium secondary battery and a positive electrode for the lithium secondary battery including the electrode assembly. By controlling a ratio (CRLip/CRSi) between a content percentage of a positive electrode additive and a silicon (Si)-containing material that is a negative electrode active material, which are contained in a positive electrode mixture layer and a negative electrode mixture layer, respectively, to a specific range, the electrode assembly has an advantage in that high charging/discharging capacity and charging/discharging efficiency can be realized during initial charging/discharging, a capacity retention rate can be excellent during subsequent charging/discharging, and a lithium secondary battery including the electrode assembly can exhibit a high energy density and long lifetime.

公开(公告)号：US20230335742A1

公开(公告)日：2023-10-19

申请号：US18026863

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Ji Hye Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M50/46 ,  H01M4/36

CPC classification number: H01M4/624 ,  H01M4/505 ,  H01M4/525 ,  H01M4/0404 ,  H01M50/46 ,  H01M4/366 ,  H01M2004/021

Abstract: A master batch for a positive electrode additive and a positive electrode slurry for a lithium secondary battery that contains the same, wherein the master batch contains a high content of irreversible additive together with a positive electrode active material so that a small amount of irreversible additive is dispersed in the positive electrode slurry with high dispersion without loss when a positive electrode is manufactured, and thus a positive electrode for a lithium secondary battery manufactured using the irreversible additive has high electrical properties and reliability, and a degree of freedom in design is improved when the positive electrode is manufactured.

公开(公告)号：US20230327103A1

公开(公告)日：2023-10-12

申请号：US18025548

申请日：2022-04-05

Applicant: LG Energy Solution, Ltd.

Inventor： Sung Chul Lim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/505 ,  H01M4/62 ,  H01M4/583 ,  H01M4/38 ,  H01M10/42 ,  H01M10/44

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M4/364 ,  H01M4/505 ,  H01M2004/028 ,  H01M4/583 ,  H01M4/386 ,  H01M10/4235 ,  H01M10/446 ,  H01M4/625

Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and the positive electrode contains a positive electrode additive represented by Formula 1 and a positive electrode mixture layer including a region with a needle-shaped crack structure in its cross-section after initial charging (activation), so an amount of gas such as oxygen generated by an irreversible additive, which is a positive electrode additive, during the subsequent charging/discharging is reduced, and the migration path of lithium ions and/or electrons is able to be ensured. Therefore, an excellent effect of improving the battery safety and electrical performance of a lithium secondary battery is exhibited.

公开(公告)号：US20240063477A1

公开(公告)日：2024-02-22

申请号：US18269710

申请日：2022-08-22

Applicant: LG Energy Solution, Ltd.

Inventor： Koo Seung Chung ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Kyung Eun Sun ,  Kyu Tae Park

IPC: H01M50/105 ,  H01M50/171 ,  H01M50/164 ,  H01M50/159 ,  H01M10/613 ,  H01M10/647 ,  H01M10/6551 ,  H01M10/04

CPC classification number: H01M50/105 ,  H01M50/171 ,  H01M50/164 ,  H01M50/159 ,  H01M10/613 ,  H01M10/647 ,  H01M10/6551 ,  H01M10/04

Abstract: A secondary battery including an electrode assembly and a pouch configured to accommodate the electrode assembly. The pouch includes two first covers provided on both surfaces of the electrode assembly in a thickness direction and two second covers provided on both surfaces of the electrode assembly in a full-width direction. The edge surfaces of the first covers and the second covers are sealed by a first sealing part, and the end surfaces of the first covers and the second covers are sealed by a second sealing part. The two second covers are in close contact with both the surfaces of the electrode assembly in the full-width direction.

公开(公告)号：US20240014400A1

公开(公告)日：2024-01-11

申请号：US18025254

申请日：2022-04-19

Applicant: LG Energy Solution, Ltd.

Inventor： Gyeong Seop Lee ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/62 ,  H01M4/131 ,  H01M10/052 ,  H01M4/04 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M4/628 ,  H01M4/131 ,  H01M4/625 ,  H01M10/052 ,  H01M4/0404 ,  H01M4/525 ,  H01M4/505 ,  H01M2004/028

Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the positive electrode is manufactured by using a pre-dispersion containing a positive electrode additive represented by Chemical Formula 1 and a conductive material having a linear structure in a positive electrode mixture layer as an irreversible additive and, by adjusting the electrode sheet resistance to satisfy a specific range, it is possible to reduce the amount of oxygen gas generated during charging and discharging, as well as easily improve the charging and discharging efficiency of the lithium secondary battery.