公开(公告)号：US12160000B2

公开(公告)日：2024-12-03

申请号：US17056073

申请日：2019-12-25

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qingwen Zhang ,  Zhen Dai ,  Yingying Wang

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M4/02

Abstract: An electrochemical device, including a cathode; an anode; and an electrolyte. The anode has an anode mixture layer on an anode current collector, the anode mixture layer includes a carbon material as an anode active material, and at least a part of a surface of the anode mixture layer or a surface of the carbon material comprises a polymer compound having Si—C and Si—O bonds. The electrochemical device has improved cycle performance and storage performance.

公开(公告)号：US12040449B2

公开(公告)日：2024-07-16

申请号：US18347053

申请日：2023-07-05

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 2.3, about 5 wt %≤Z≤about 50 wt %, 1 wt %

公开(公告)号：US11949108B2

公开(公告)日：2024-04-02

申请号：US16940225

申请日：2020-07-27

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Jing Jiang ,  Qiao Zeng ,  Kefei Wang

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/624 ,  H01M4/133 ,  H01M4/364 ,  H01M4/366 ,  H01M4/587 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode including a negative electrode active material layer and an additive. The additive includes a metal sulfide. The additive is distributed in the negative electrode active material layer, and/or distributed on the surface of the negative electrode active material layer. The negative electrode effectively improves the performance of the lithium ion battery, and greatly improves the capacity and cycle performance of the lithium ion battery.

公开(公告)号：US11799131B2

公开(公告)日：2023-10-24

申请号：US17885920

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 electrochemical device, including an electrode and an electrolyte. The 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 0.1≤(X/Y)≤ about 8. The electrode including a coating, which including a single-sided sub-coating and a double-sided coating, the electrode with the single-sided sub-coating has an electrode compaction density D1, and the electrode with the double-sided coating has an electrode compaction density D2, where about 0.8≤D1/D2≤ about 1.2. The electrolyte and D1/D2 of the electrodes has a significant effect on the cycle performance of the electrochemical device.

公开(公告)号：US20210280912A1

公开(公告)日：2021-09-09

申请号：US17326187

申请日：2021-05-20

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang

IPC: H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48

Abstract: An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a cyclic phosphonic anhydride. Based on a total weight of the electrolyte, a weight percentage (Cf) of the fluorinated cyclic carbonate is greater than a weight percentage (Cn) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

公开(公告)号：US20160233545A1

公开(公告)日：2016-08-11

申请号：US14963096

申请日：2015-12-08

Applicant: Ningde Amperex Technology Limited

Inventor： Peipei CHEN ,  Bing Long ,  Kefei Wang

IPC: H01M10/0567 ,  C07D495/04 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  C07D495/04 ,  H01M10/0525 ,  H01M2300/0025

Abstract: The present application discloses an electrolyte additive comprising a thiophene compound. When used in a lithium ion battery, the additive can inhibit a sustained electrochemical oxidation reaction between an electrolyte and a positive electrode material, thereby improving the electrical conductivity of the positive electrode material, enhancing the cycle performance and high-current discharge performance of the battery, and improving the safety performance and rate performance of the battery.

Abstract translation: 本申请公开了一种包含噻吩化合物的电解质添加剂。 当用于锂离子电池时，添加剂可以抑制电解质和正极材料之间持续的电化学氧化反应，从而提高正极材料的导电性，提高电池的循环性能和高电流放电性能 ，并提高电池的安全性能和性能。

公开(公告)号：US12191442B2

公开(公告)日：2025-01-07

申请号：US18320077

申请日：2023-05-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang

IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/133 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/60 ,  H01M4/62 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application relates to an electrochemical device and an electronic device including the same. In particular, this application provides an electrochemical device, including a cathode, an anode and an electrolytic solution, where the anode includes a carbon material and hydroxyalkyl methylcellulose, and the electrolytic solution includes propionate. The electrochemical device of this application has excellent cycle, storage and low-temperature performance.

公开(公告)号：US12183884B2

公开(公告)日：2024-12-31

申请号：US18626697

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

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 %

公开(公告)号：US12148876B2

公开(公告)日：2024-11-19

申请号：US17485807

申请日：2021-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang ,  Bing Jiang

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and the negative electrode mixture layer includes a negative electrode active substance. An elongation at a yield point of the negative electrode mixture layer and D50 of the negative electrode active substance satisfy a specified relationship, and the electrolyte includes a compound having a cyano group.

公开(公告)号：US12125983B2

公开(公告)日：2024-10-22

申请号：US17326191

申请日：2021-05-20

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang

IPC: H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48

CPC classification number: H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48 ,  H01M2300/0025

Abstract: An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a cyclic carbonate having a carbon-carbon double bond. Based on a total weight of the electrolyte, a weight percentage (Cf) of the fluorinated cyclic carbonate is greater than a weight percentage (Cn) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.