公开(公告)号：US12148875B2

公开(公告)日：2024-11-19

申请号：US17040500

申请日：2019-10-31

Applicant: LG CHEM, LTD.

Inventor： Eunkyung Park ,  Minchul Jang ,  Suk Il Youn ,  Byoungkuk Son ,  Changhun Park ,  Doyeon Kim ,  Bora Jung ,  Yeilin Ham

IPC: H01M10/052 ,  C01G51/00 ,  C01G53/00 ,  H01M4/04 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0565 ,  H01M10/0566

Abstract: A lithium secondary battery including a positive electrode, a negative electrode comprising a negative electrode current collector, and an electrolyte disposed between the positive electrode and the negative electrode; and a lithium metal layer on the negative electrode current collector in the negative electrode. The electrolyte includes a first electrolyte layer and a second electrolyte disposed on the first electrolyte layer, wherein the first electrolyte layer faces the negative electrode, and the second electrolyte layer faces the positive electrode. The first electrolyte layer has higher ion conductivity than the second electrolyte layer, and wherein the lithium metal layer is formed by migration of lithium ions from the positive electrode after charging.

公开(公告)号：US20240372218A1

公开(公告)日：2024-11-07

申请号：US18597783

申请日：2024-03-06

Applicant: LG ENERGY SOLUTION, LTD.

Inventor： Jin Young SHIN ,  So Mi Jeong ,  Ji Hyun Bang ,  Won Sik Bae

IPC: H01M50/457 ,  H01M4/02 ,  H01M4/134 ,  H01M10/0566 ,  H01M50/42 ,  H01M50/443 ,  H01M50/491

Abstract: A separator for an electrochemical device includes a porous polymer substrate; a first coating layer provided on at least one surface of the porous polymer substrate and containing a first polymer resin of a first solubility in an electrolyte; and a second coating layer provided on the first coating layer and including a second polymer resin of a second solubility in the electrolyte, and inorganic particles, wherein the first solubility is higher than the second solubility in the electrolyte, and the separator is provided on a negative electrode containing a silicon (Si).

公开(公告)号：US20240356069A1

公开(公告)日：2024-10-24

申请号：US18758405

申请日：2024-06-28

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG

IPC: H01M10/0566 ,  H01M4/02 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M10/0566 ,  H01M4/364 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

Abstract: An electrochemical apparatus including: a positive electrode, a negative electrode, and an electrolyte, where the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material, where the positive electrode active material includes lithium nickel cobalt manganate containing aluminum, zirconium, and tungsten. The electrolyte includes a dinitrile compound. The electrochemical apparatus according to this application has improved overcharge resistance and safety under high temperature and high pressure.

公开(公告)号：US20240322234A1

公开(公告)日：2024-09-26

申请号：US18731804

申请日：2024-06-03

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Hai LONG ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525

CPC classification number: H01M10/0566 ,  H01M10/0525 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The electrolyte solution includes fluoroethylene carbonate and a trinitrile compound. Based on a mass of the electrolyte solution, a mass percent of the fluoroethylene carbonate is A %, satisfying: 4≤ A≤10, and a mass percent of the trinitrile compound is B %, satisfying: 1≤B≤3. A positive active material of a positive electrode includes a metal element M. The metal element M includes at least one of Ti, Mg, or Al. A content of the metal element M in the positive active material is C ppm. C and B satisfy: 7≤C×B/1000≤27.

公开(公告)号：US20240258565A1

公开(公告)日：2024-08-01

申请号：US18626447

申请日：2024-04-04

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, about 40 wt %≤Z≤about 50 wt %, and about 0.01

公开(公告)号：US12046711B2

公开(公告)日：2024-07-23

申请号：US17095898

申请日：2020-11-12

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/525 ,  H01M4/48 ,  H01M4/485 ,  H01M4/52 ,  H01M10/0525 ,  H01M10/056 ,  H01M10/0564 ,  H01M10/0566 ,  H01M10/0585 ,  H01M50/10 ,  H01M50/409 ,  H01M50/431 ,  H01M50/434 ,  H01M50/437 ,  H01M50/489 ,  H01M4/02 ,  H01M50/463 ,  H01M50/491

CPC classification number: H01M10/0525 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0585 ,  H01M50/10 ,  H01M50/409 ,  H01M50/431 ,  H01M50/489 ,  H01M2004/021 ,  H01M50/463 ,  H01M50/491

Abstract: Provided is a lithium secondary battery including a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed therebetween, an electrolytic solution, and an exterior body including a closed space, which accommodates the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolytic solution, wherein the positive electrode layer, the ceramic separator, and the negative electrode layer are bonded together, a ratio C/A of a capacity C of the positive electrode layer to a capacity A of the negative electrode layer is 1.03 to 2.30, a ratio Tc/Ta of a thickness Tc of the positive electrode layer to a thickness Ta of the negative electrode layer is 0.50 to 2.00, the thickness Tc is 50 to 1000 μm, and the thickness Ta is 50 to 1200 μm.

公开(公告)号：US11984556B2

公开(公告)日：2024-05-14

申请号：US17990626

申请日：2022-11-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

IPC: H01M4/64 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein about 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, 1 wt %≤Y

公开(公告)号：US11905487B2

公开(公告)日：2024-02-20

申请号：US16544236

申请日：2019-08-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masahiro Ishizuka

IPC: H01M50/103 ,  H01M50/15 ,  H01M10/0566 ,  C10M169/00 ,  B23K26/20 ,  H01M10/05 ,  H01M10/04 ,  H01M50/119 ,  H01M50/159 ,  H01M50/169

CPC classification number: C10M169/00 ,  B23K26/206 ,  H01M10/04 ,  H01M10/05 ,  H01M10/0566 ,  H01M50/103 ,  H01M50/15 ,  H01M50/119 ,  H01M50/159 ,  H01M50/169

Abstract: A method of manufacturing a non-aqueous secondary battery includes the steps of preparing a case main body, preparing a lid, applying a lubricant to a contact location, and assembling a lid to an open end of the case main body. In the step of preparing a lid, a lid to be fitted to the open end of the case main body is prepared. In the step of applying a lubricant, the lubricant is applied to at least a portion of the contact location at which the case main body and the lid are in contact with each other. In the step of assembling the lid to the open end, the lid is assembled to the open end with the lubricant having been applied to the contact location. The lubricant may be a solvent used in a non-aqueous electrolyte solution for non-aqueous secondary batteries.

公开(公告)号：US11807698B2

公开(公告)日：2023-11-07

申请号：US15117639

申请日：2015-02-24

Applicant: ZEON CORPORATION

Inventor： Tomokazu Sasaki

IPC: C08F212/08 ,  H01M50/446 ,  H01M50/417 ,  H01M50/423 ,  H01M4/62 ,  C08L33/08 ,  H01M50/46 ,  C08F220/18 ,  C08F220/68 ,  C08K3/22 ,  H01M10/05 ,  H01M10/0566 ,  H01M10/0525

CPC classification number: C08F212/08 ,  C08F220/1808 ,  C08F220/68 ,  C08K3/22 ,  C08L33/08 ,  H01M4/622 ,  H01M10/05 ,  H01M50/417 ,  H01M50/423 ,  H01M50/446 ,  H01M50/46 ,  C08K2003/2227 ,  H01M10/0525 ,  H01M10/0566 ,  C08F220/1808 ,  C08F212/08 ,  C08F222/02 ,  C08F222/102 ,  C08F212/08 ,  C08F220/1808 ,  C08F222/02 ,  C08F222/102 ,  C08F212/08 ,  C08F220/1808 ,  C08F220/06 ,  C08F220/56

Abstract: Provided is a binder for non-aqueous secondary battery porous membrane-use that enables formation of a porous membrane having excellent durability and that can improve stability under high shear of a composition for porous membrane-use. The binder for non-aqueous secondary battery porous membrane-use includes a particulate polymer. The particulate polymer is a random copolymer including at least 35 mass % of an alkyl (meth)acrylate monomer unit and at least 20 mass % and no greater than 65 mass % of an aromatic monovinyl monomer unit. A degree of swelling of the particulate polymer with respect to a non-aqueous electrolysis solution is greater than a factor of 1 and no greater than a factor of 2.

公开(公告)号：US11799130B2

公开(公告)日：2023-10-24

申请号：US17885915

申请日：2022-08-11

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

IPC: H01M4/64 ,  H01M4/13 ,  H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z; where about 2 wt %≤(X+Y)≤about 11 wt %, about 0.1≤(X/Y)≤about 8, and about 0.01≤(Y/Z)≤about 0.3. The dinitrile compound comprises a compound of Formula (5): N—R2—(O—R3)n—O—R4—CN (5). The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.