公开(公告)号：US20250158128A1

公开(公告)日：2025-05-15

申请号：US19006912

申请日：2024-12-31

Applicant: Ningde Amperex Technology Limited

Inventor： Rui WANG ,  Xiang WANG ,  Hui CUI ,  Chao TANG

IPC: H01M10/0568 ,  C07C255/05 ,  C07C255/16 ,  H01M10/0525

Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate and an electrolyte, where the positive electrode plate includes a positive electrode active material layer, and the negative electrode plate includes a negative electrode active material layer. Observed along a thickness direction of the electrochemical device, in a width direction of the negative electrode plate, the negative electrode active material layer includes two protruding regions not overlapping with the positive electrode active material layer on two sides, and a width M mm of the protruding region is 0.5 mm to 2 mm. The electrolyte includes a polynitrile compound, and the polynitrile compound includes a compound represented by formula I-A. Based on a mass of the electrolyte, a mass percentage N % of the polynitrile compound is 0.01% to 8%. 0.01≤M×N

公开(公告)号：US20240332619A1

公开(公告)日：2024-10-03

申请号：US18619244

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junhua JIAN ,  Xiang WANG ,  Hefeng GUO ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/0404 ,  H01M4/386 ,  H01M10/0569 ,  H01M2004/027

Abstract: An electrolyte includes a non-aqueous organic solvent and an additive A, where the additive A includes a salt composed of anions and cations represented by formula (I); M1 is selected from group IIIA elements, and cations include any one of Li+, Na+, K+, Mg2+, Ca2+, and Zn2+; and based on a mass of the electrolyte, a mass percentage of the additive A is x %, with 0.01≤x≤60. The electrolyte with the additive A included and its mass percentage controlled within the range defined in this application can enhance the stability of the negative electrode interface and the positive electrode interface, reducing the high-temperature gas production of the electrolyte and thereby improving the high-temperature cycling performance and high-temperature storage performance of the secondary battery.

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：US20240250304A1

公开(公告)日：2024-07-25

申请号：US18619623

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Xiang WANG ,  Rui WANG ,  Chao TANG

IPC: H01M10/0567 ,  C07C69/02 ,  C07C69/14 ,  C07C255/04 ,  C07C255/05 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M10/0567 ,  C07C69/02 ,  C07C69/14 ,  C07C255/04 ,  C07C255/05 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2300/0025

Abstract: An electrochemical apparatus includes an electrolyte, where the electrolyte includes a carboxylate compound and fluoroethylene carbonate (FEC). Based on a total weight of the electrolyte, percentages of the carboxylate compound and FEC are w1 and w2 respectively, where 5%≤w1≤60%, 2%≤w2≤12%, and 2≤w1/w2≤20. The electrochemical apparatus delivers excellent fast charging performance and high-temperature interval cycle performance.

公开(公告)号：US20250158130A1

公开(公告)日：2025-05-15

申请号：US19019945

申请日：2025-01-14

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Jianming ZHENG ,  Xiang WANG ,  Mingming GUAN

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

Abstract: An electrochemical apparatus includes an electrolyte, a positive electrode, and a negative electrode. The negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies 0.005≤A/B≤0.1; where a mass of the fluoroethylene carbonate corresponding to 1 g of the negative active material is A g, and a specific surface area of the negative active material is B m2/g. This application aims to improve the fast charging performance of the electrochemical apparatus while maintaining the cycle performance thereof.