公开(公告)号：US20230352678A1

公开(公告)日：2023-11-02

申请号：US18214800

申请日：2023-06-27

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gu Yoo ,  Younguk Park ,  Jintae Hwang ,  Wang Mo Jung ,  Sungbin Park

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/505 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2002/60 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/61 ,  C01P2006/40 ,  H01M2004/028

Abstract: A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle has a plurality of crystal grains. An average particle size (D50) of the single particle is from 3.5 μm to 8 μm. The single particle includes a metal doped in the crystal lattice thereof.

公开(公告)号：US20230331583A1

公开(公告)日：2023-10-19

申请号：US18004743

申请日：2022-02-18

Applicant: LG Energy Solution, Ltd.

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

IPC: C01G51/00 ,  H01M10/052

CPC classification number: C01G51/42 ,  C01G51/006 ,  H01M10/052 ,  C01P2004/61 ,  C01P2006/40

Abstract: Provided are a sacrificial positive electrode material with a reduced gas generation amount and a method of preparing the same. The method includes calcinating a raw material mixture of lithium oxide (Li2O) and cobalt oxide (CoO) to prepare a lithium cobalt metal oxide, wherein the lithium oxide (Li2O) has an average particle size (D50) of 50 µm or less, and the resulting sacrificial positive electrode material has an electrical conductivity of 1 × 10-4 S/cm or more. The method of preparing a sacrificial positive electrode material can reduce the generation of gas, particularly, oxygen (O2) gas, in an electrode assembly during charging of a battery by adjusting the electrical conductivity of the sacrificial positive electrode material within a specific range using lithium oxide that satisfies a specific size, and thus the stability and lifespan of the battery including the same can be effectively enhanced.

公开(公告)号：US20230246180A1

公开(公告)日：2023-08-03

申请号：US18004263

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: H01M4/505 ,  H01M4/04 ,  H01M4/587 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/0404 ,  H01M4/587 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

Abstract: Provided are a positive electrode for a lithium secondary battery and a lithium secondary battery containing the same. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed thereon and includes a positive electrode active material, a positive electrode additive represented by Formula 1 (LipCo(1-q)M1qO4), a conductive material, and a binder. Furthermore, Equation 1 (RLCZO/R0) is 1.55 or less, wherein RLCO represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is contained in the positive electrode mixture layer, and R0 represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is not contained in the positive electrode mixture layer. The positive electrode is manufactured using a pre-dispersion containing the positive electrode additive in a positive electrode mixture layer as an irreversible additive.

公开(公告)号：US20220200005A1

公开(公告)日：2022-06-23

申请号：US17604577

申请日：2020-05-12

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gon Kim ,  Sin Young Park ,  Bo Ram Lee ,  Seul Ki Kim ,  Tae Gu Yoo ,  Min Kwak

IPC: H01M4/62

Abstract: A conductive agent includes a first particle and a second particle, wherein the first particle includes a secondary particle structure in which graphene sheets are connected to each other, the first particle includes a plurality of graphene sheets arranged in different directions, and the second particle is a carbon nanotube. An electrode including the conductive agent, and a secondary battery including the electrode are also provided.