公开(公告)号：US20240014399A1

公开(公告)日：2024-01-11

申请号：US18022834

申请日：2021-11-18

Applicant: LG Energy Solution, Ltd.

Inventor： Hae Jung Jung ,  Boram Lee ,  Tae Gu Yoo ,  Wang Mo Jung ,  Byungchun Park

IPC: H01M4/62 ,  H01M4/131

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

Abstract: An additive for a positive electrode of a lithium secondary battery, the additive including a lithium transition metal oxide, Li3PO4, Li5AlO4 and Li3BO3. The lithium transition metal oxide has an aluminum-doped form. The additive including Li3PO4, Li5AlO4 and Li3BO3 together with the lithium transition metal oxide has functionality of improving stability of a battery when used in a positive electrode of a lithium secondary battery. The Li3PO4, the Li5AlO4 and the Li3BO3 are evenly mixed with the lithium transition metal oxide or some thereof form a partial coating layer, or a portion of aluminum is doped to the lithium transition metal oxide to suppress the lithium transition metal oxide from causing a side reaction with an electrolyte liquid.

公开(公告)号：US20230420669A1

公开(公告)日：2023-12-28

申请号：US18038923

申请日：2021-11-30

Applicant: LG Energy Solution, Ltd.

Inventor： Sang Wook Lee ,  Dae Jin Lee ,  Sang Min Park ,  Min Kwak ,  Wang Mo Jung ,  Gi Beom Han ,  Eun Sol Lho ,  Joong Yeop Do ,  Kang Joon Park

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028

Abstract: The present invention relates to a positive electrode active material having low nickel disorder and high particle strength in a crystal structure, and capable of implementing a battery having excellent capacity properties and capacity retention, and a positive electrode and a lithium secondary battery including the same, wherein the positive electrode active material includes a large-diameter lithium transition metal oxide and a small-diameter lithium transition metal oxide whose average particle diameter (D50) is smaller than that of the large-diameter lithium transition metal oxide, wherein the large-diameter lithium transition metal oxide and the small-diameter lithium transition metal oxide each independently have a composition represented by Formula 1, and has a crystal grain size of 100 nm to 150 nm, wherein the difference in crystal grain size between the large-diameter lithium transition metal oxide and the small-diameter lithium transition metal oxide is less than 40 nm, and the positive electrode active material has a nickel disorder (Ni-disorder) of 1.5% or less.

公开(公告)号：US20230402597A1

公开(公告)日：2023-12-14

申请号：US18034991

申请日：2021-12-24

Applicant: LG Energy Solution, Ltd.

Inventor： Hyeong II Kim ,  Hak Yoon Kim ,  So Ra Baek ,  Hyuck Hur ,  Dong Hwi Kim ,  Seul Ki Chae ,  Wang Mo Jung ,  Dong Hun Lee

IPC: H01M4/525 ,  H01M10/052 ,  H01M4/505 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/525 ,  H01M10/052 ,  H01M2004/028 ,  H01M4/364 ,  H01M4/625 ,  H01M4/505

Abstract: A positive electrode for a lithium secondary battery includes a positive electrode active material layer including: a first positive electrode active material represented by Formula 1 and having a crystalline size of 150 nm or more; a conductive agent including single-walled carbon nanotubes (SWCNTs); and a binder. A lithium secondary battery includes the positive electrode.

公开(公告)号：US20230378433A1

公开(公告)日：2023-11-23

申请号：US18031473

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: H01M4/131 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/38 ,  H01M4/134

CPC classification number: H01M4/131 ,  H01M10/0525 ,  H01M4/625 ,  H01M4/386 ,  H01M4/134 ,  H01M2004/028

Abstract: The present technology provides a positive electrode for a lithium secondary battery and a lithium secondary battery including the same. In the positive electrode, a positive electrode additive represented by Formula 1 is contained in a positive electrode mixture layer, and specific X-ray diffraction (XRD) and/or extended X-ray absorption fine-structure (EXAFS) peak(s) are controlled for cobalt remaining in the positive electrode mixture layer after initial charging to SOC 100% to have a specific oxidation number, thereby reducing side reactions caused by the irreversible additive, that is, the positive electrode additive, and reducing the amount of gas such as oxygen generated during charging/discharging. Therefore, the lithium secondary battery has an excellent effect of improving battery safety and electrical performance.

公开(公告)号：US20230275209A1

公开(公告)日：2023-08-31

申请号：US18195089

申请日：2023-05-09

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gu Yoo ,  Young Uk Park ,  Jin Tae Hwang ,  Wang Mo Jung ,  Sung Bin Park

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/0471 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/366 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode active material includes a lithium transition metal oxide, which is doped with doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, and contains nickel in an amount of 60 mol % or more based on a total number of moles of transition metals excluding lithium, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the doping element M2 is included in an amount of 3,580 ppm to 7,620 ppm based on a total weight of the positive electrode active material.

公开(公告)号：US20230223526A1

公开(公告)日：2023-07-13

申请号：US18151079

申请日：2023-01-06

Applicant: LG Energy Solution Ltd.

Inventor： Jong Wook Heo ,  Wang Mo Jung ,  Chi Ho JO ,  Jin Tae Hwang ,  Hae Jung Jung ,  Byung Joon Chae ,  Tae Gu Yoo ,  Suk Bae Yoon ,  Hyeon Jin Cho

IPC: H01M4/485 ,  H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/485 ,  H01M4/525 ,  H01M4/505 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode material powder including a lithium nickel-based oxide represented by Chemical Formula 1 (LiaNibCocM1dM2eO2) and having a degree of single-particle formation, represented by the following Equation (1), of 0.3 to 0.8:







∑

i
=
1

n




4
⁢
π

3

⁢

R
i
3



n

×


1

D
50


.





In Equation (1), Ri is a radius of the ith grain as measured by subjecting an electrode manufactured using the positive electrode material powder to ion milling and then analyzing the cross section of the electrode by electron backscatter diffraction (EBSD), n is the total number of grains as measured by the EBSD analysis and ranges from 350 to 450, and D50 is a volume-cumulative average particle diameter of the positive electrode material powder as measured using a laser diffraction particle size analyzer.

公开(公告)号：US20230083736A1

公开(公告)日：2023-03-16

申请号：US17941284

申请日：2022-09-09

Applicant: LG Energy Solution, Ltd.

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

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

Abstract: A positive electrode active material and a method for producing the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium-nickel-based oxide in the form of at least one of single particles or a pseudo-single particles, wherein each single particle consists of one nodule, wherein each pseudo-primary particles is a composite of 30 or fewer nodules, wherein on the surface of the lithium-nickel-based oxide, a number of nickel ions having an oxidation number of +3 or higher is greater than a number of nickel ions having an oxidation number less than +3.

公开(公告)号：US20230059519A1

公开(公告)日：2023-02-23

申请号：US17784319

申请日：2021-02-26

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gu Yoo ,  Byung Chun Park ,  Bo Ram Lee ,  Tae Gon Kim ,  Min Kwak ,  Wang Mo Jung

IPC: C01G53/00 ,  H01M50/46 ,  H01M10/052

Abstract: Provided is a method of preparing an irreversible positive electrode additive for a secondary battery, which includes mixing Li2O, NiO, and NH4VO3 and performing thermal treatment to prepare a lithium nickel composite oxide represented by Chemical Formula 1 below, wherein the NH4VO3 is mixed in an amount of 1.5 to 6.5 parts by weight with respect to a total of 100 parts by weight of the Li2O, NiO, and NH4VO3. Li2+aNi1−b−cM1bVcO2−dAd  [Chemical Formula 1] In Chemical Formula 1,
M1 is at least one selected from the group consisting of Cu, Mg, Pt, Al, Co, P, W, Zr, Nb, and B, A is at least one selected from the group consisting of F, S, Cl, and Br, and 0≤a≤0.2, 0≤b≤0.5, 0.01≤c≤0.065, and 0≤d≤0.2 are satisfied.

公开(公告)号：US20230034497A1

公开(公告)日：2023-02-02

申请号：US17788814

申请日：2021-01-29

Applicant: LG Energy Solution, Ltd.

Inventor： Sang Min Park ,  Eun Sol Lho ,  Sung Bin Park ,  Seul Ki Kim ,  Wen Xiu Wang ,  Joong Yeop Do ,  Wang Mo Jung

IPC: H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M4/04 ,  H01M10/052

Abstract: A positive electrode active material, method of making the same, and positive electrode and lithium secondary battery include the same are disclosed herein. In some embodiments, a positive electrode active material in a form of single particles, includes a lithium transition metal oxide having nickel (Ni) in an amount greater than 50 mol % based on a total number of moles of transition metals excluding lithium, wherein a single particle has a region of 50 nm or less from a surface of the single particle along a center direction, and wherein a structure belonging to space group FD3-M and a structure belonging to space group Fm3m are formed in the region, and wherein a generation rate of fine powder having an average particle diameter (D50) of 1 μm or less is in a range of 5% to 30% when the positive electrode active material is rolled at 650 kgf/cm2.

公开(公告)号：US20250062323A1

公开(公告)日：2025-02-20

申请号：US18720965

申请日：2023-01-06

Applicant: LG Energy Solution, Ltd.

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

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/525 ,  H01M10/052

Abstract: A positive electrode active material including a lithium nickel-based oxide in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 30 or less nodules; and a coating portion which is formed in the form of an island on a portion of a surface of the lithium nickel-based oxide particle and includes cobalt (Co), wherein, in a Ni L3-edge spectrum obtained by measuring the surface of the lithium nickel-based oxide, which is in contact with the coating portion, by electron energy loss spectroscopy, an intensity at 855.5 eV is higher than an intensity at 853 eV. A preparation method thereof, a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.