公开(公告)号：US20250112275A1

公开(公告)日：2025-04-03

申请号：US18898814

申请日：2024-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: An electrolyte solution, including fluorine-containing cyclic carbonate represented by Formula I and a first compound, where the first compound includes at least one of a compound of Formula II and a compound of Formula III and where based on a total mass of the electrolyte solution, a mass percent of the first compound is A %, and a mass percent of the fluorine-containing cyclic carbonate represented by Formula I is B %, where A and B satisfy: 40≤A≤80, and 3≤A/B≤11.

公开(公告)号：US20250070245A1

公开(公告)日：2025-02-27

申请号：US18622931

申请日：2024-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Xin CAI ,  Hui CUI ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525

Abstract: An electrolyte of the electrochemical apparatus includes a linear carboxylate compound and a dinitrile compound. Based on total mass of the electrolyte, a mass percentage a of the linear carboxylate compound is 20% to 70% and a mass percentage b of the dinitrile compound is 0.01% to 7%; a bonding force between a negative electrode active material layer and a negative electrode current collector of a negative electrode plate is peeling strength, where the peeling strength F measured in N/m is 5 N/m to 20 N/m; and the mass percentage a of the linear carboxylate compound, the mass percentage b of the dinitrile compound, and the peeling strength F satisfy a relation 0.14≤(100b+F)/100a≤1.35.

公开(公告)号：US20240332621A1

公开(公告)日：2024-10-03

申请号：US18622165

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Shikang LUO ,  Junqiang HAN ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525

CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive active material layer. The positive active material layer includes a positive active material and a positive electrode additive. The positive electrode additive includes at least one of lithium titanium aluminum phosphate, lithium lanthanum titanium oxide, lithium lanthanum tantalum oxide, lithium aluminum germanium phosphate, lithium lanthanum zirconium oxide, niobium-doped lithium lanthanum zirconium oxide, or tantalum-doped lithium lanthanum zirconium oxide. The electrolyte includes a compound represented by Formula (I). Based on a mass of the positive active material layer, a mass percent of the positive electrode additive is p %, satisfying: 0.1≤p≤1.2. Based on a mass of the electrolyte, a mass percent of the compound represented by Formula (I) is q %, satisfying: 0.1≤q≤12.

公开(公告)号：US20220336855A1

公开(公告)日：2022-10-20

申请号：US17709650

申请日：2022-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Xiang WANG ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M4/38

Abstract: An electrochemical device including an electrolyte. The electrolyte includes a non-fluorinated cyclic carbonate and an ether multi-nitrile compound. The non-fluorinated cyclic carbonate includes ethylene carbonate. Based on a mass of the electrolyte, a content of the ethylene carbonate is X %, and a content of the ether multi-nitrile compound is A %. The electrochemical device further includes a positive electrode. The positive electrode includes a positive electrode active material layer and a positive current collector. The positive electrode active material layer includes a positive electrode active material. The positive electrode active material includes an element M. The element M includes at least one of Al, Mg, Ti, Zr, or W. Based on a mass of the positive electrode active material, a content of the element M is C ppm, 1000≤C≤22000, X+A≤15, and 133≤C/A≤22000.

公开(公告)号：US20210408600A1

公开(公告)日：2021-12-30

申请号：US16770783

申请日：2019-12-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Hui CUI ,  Shuirong ZHANG ,  Chao TANG ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/525 ,  H01M4/66 ,  H01M50/491 ,  H01M50/417

Abstract: An electrolyte includes at least one of a compound of Formula I, a compound of Formula II or a compound of Formula III; and a compound of Formula IV; where, R11, R12, R13, R21, R22, R31, R32, R33 and R34 are independently selected from H, halo, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and substituted or unsubstituted C6-C12 aryl; R41 and R44 are independently selected from H, F, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C6-C12 aryl, Ra—(O—Rb), or (O—Rb); and R42 and R43 are independently selected from Rc—(O—Rd) or (O—Rd). Rb is selected from substituted or unsubstituted C1-C4 alkyl; Ra, Rc and Rd are independently selected from substituted or unsubstituted C1-C4 alkylene, C2-C5 alkenylene, or C6-C12 aryl.

公开(公告)号：US20240332618A1

公开(公告)日：2024-10-03

申请号：US18619188

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Yezhen ZHENG ,  Wenqiang LI

IPC: H01M10/0567 ,  C07C43/04 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C07C43/04 ,  C07C43/046 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025

Abstract: An electrochemical device includes a negative electrode and an electrolyte solution. The negative electrode includes a negative current collector and a negative electrode mixture layer. The negative electrode mixture layer includes a first section, a second section, and a third section arranged sequentially in a thickness direction. The first section, the second section, and the third section are of an identical thickness. A ratio of a porosity P1 of the first section to a porosity P2 of the third section is P. The electrolyte solution includes an additive A, which is at least one selected from a compound of Formula I or a compound of Formula II:




Based on a total mass of the electrolyte solution, a mass percent of the additive A is w %, satisfying 1≤w≤60, P=P1/P2, and P/(w %+1)≥50%.

公开(公告)号：US20250070256A1

公开(公告)日：2025-02-27

申请号：US18804403

申请日：2024-08-14

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Lilan ZHANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte. The electrolyte includes a diluent, an electrolytic salt, and a compound of formula III. The diluent is selected from a group consisting of a compound of formula I and a compound of formula II. A molar mass of the diluent is Mz, and based on a total weight of the electrolyte, a percentage of the diluent is z wt %; a molar mass of the electrolytic salt is Mx, and based on the total weight of the electrolyte, a percentage of the electrolytic salt is x wt %; and a molar mass of the compound of formula III is My, and based on the total weight of the electrolyte, a percentage of the compound of formula III is y wt %, satisfying: 0.4 : 1 ≤ y M ⁢ y : x M ⁢ x ≤ 4 : 1 ; and z M ⁢ z y M ⁢ y + x M ⁢ x ≥ 1.5 .

公开(公告)号：US20250023106A1

公开(公告)日：2025-01-16

申请号：US18899505

申请日：2024-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Junfei LIU ,  Chao TANG ,  Junqiang HAN

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrochemical apparatus includes a positive electrode and an electrolyte. The electrolyte includes ethylene carbonate (EC), propylene carbonate (PC), and succinonitrile (SN). The positive electrode includes a positive electrode active material, where the positive electrode active material includes metal element A, and the metal element A includes at least one of the following elements: Mg, Zr, or Al. Based on a mass of the electrolyte, a mass percentage of SN is a %, a mass percentage of EC is b %, and a mass percentage of PC is c %, where k=b/c, 1.25≤k≤6, and a/k≥0.2. Based on a mass of the positive electrode active material, a mass percentage of the metal element A is x %, where 0.01≤x≤1. The foregoing electrochemical apparatus exhibits excellent high-temperature cycling performance and high-temperature interval cycling performance.

公开(公告)号：US20230395859A1

公开(公告)日：2023-12-07

申请号：US18452049

申请日：2023-08-18

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Wenqiang LI ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/4235 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a positive active material. The positive active material contains an Mg element. Based on a total weight of the positive active material, a weight of the Mg element is X ppm, and 300≤X≤30000. The electrolytic solution contains carboxylate. Based on a total weight of the electrolytic solution, a weight percent of the carboxylate is Y %, and Y≤60. The electrochemical device satisfies 5≤X/Y≤6000. The electrochemical device effectively improve the high-temperature cycle performance and low-temperature discharge performance of the electrochemical device by controlling a relationship between the electrolytic solution and the positive active material.

公开(公告)号：US20220006122A1

公开(公告)日：2022-01-06

申请号：US17475704

申请日：2021-09-15

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Wenqiang LI ,  Yali XIONG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/46

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the electrolyte contains a nitrile compound and transition metal ions, and satisfies 5≤A/B≤30000, where based on a molar mass of the electrolyte, a molar percentage of a cyano group in the electrolyte is A %, and based on a weight of the electrolyte, a weight percentage of the transition metal ions in the electrolyte is B %. The electrochemical device ensures that the cyano group and the transition metal ions in the electrolyte satisfy a specified relationship, to reduce leaching of the transition metal ions from a positive electrode active material and stabilize structural distortion of the positive electrode active material in a charge and discharge process, thereby improving high-temperature cycle performance and floating charge performance of the electrochemical device.