公开(公告)号：US20250140814A1

公开(公告)日：2025-05-01

申请号：US19004889

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Guoxia YUAN ,  Ye LANG ,  Juan ZHOU ,  Leimin XU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/505 ,  H01M4/583 ,  H01M10/0525

Abstract: An electrochemical device, including a positive electrode plate. The positive electrode plate includes a positive active material layer. When the electrochemical device is in a fully discharged state, an X-ray diffraction pattern of the positive active material layer exhibits a first diffraction peak and a second diffraction peak in a range of 17.8° to 19.2°. A diffraction angle of the first diffraction peak is smaller than a diffraction angle of the second diffraction peak. The electrochemical device achieves an increased energy density and improved cycle performance.

公开(公告)号：US20250140830A1

公开(公告)日：2025-05-01

申请号：US19004933

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Juan ZHOU ,  Guoxia YUAN ,  Ye LANG ,  Leimin XU

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/131 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42

Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, and an electrolyte. The negative electrode plate includes a negative electrode active layer, the positive electrode plate includes a positive electrode active layer, the positive electrode active layer includes a positive electrode active material, the positive electrode active layer includes element aluminum, an amount A (mmol) of the element aluminum in the positive electrode active layer and a total area B (m2) of the negative electrode active layer satisfy 3≤A/B≤25, and the positive electrode active material includes lithium manganese oxide and a manganese-containing compound.

公开(公告)号：US20250140832A1

公开(公告)日：2025-05-01

申请号：US19005061

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Juan ZHOU ,  Ye LANG ,  Guoxia YUAN ,  Leimin XU

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/58 ,  H01M10/0567

Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive electrode active layer, the positive electrode active layer includes a positive electrode active material, and the positive electrode active material includes an additive. During charge/discharge the electrochemical device, when the electrochemical device is in a fully discharged state, an X-ray diffraction pattern of the positive electrode plate has a characteristic diffraction peak 1 at a diffraction angle 2θ ranging from 17.5° to 19.5°, and the additive includes manganese element.

公开(公告)号：US20250140795A1

公开(公告)日：2025-05-01

申请号：US19005031

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Juan ZHOU ,  Guoxia YUAN ,  Ye LANG ,  Leimin XU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525

Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and the positive electrode active material layer includes a first lithium manganese oxide and a second lithium manganese oxide; and in a fully discharged state of the electrochemical apparatus, through Raman test, the first lithium manganese oxide has a characteristic peak A in a range of 507 cm−1±10 cm−1 and a characteristic peak B in a range of 660 cm−1±10 cm−1, and the second lithium manganese oxide has a characteristic peak C in a range of 625 cm−1±10 cm−1. The electrochemical apparatus has high initial coulombic efficiency and excellent cycling performance on the basis of high energy density.