公开(公告)号：US20250023042A1

公开(公告)日：2025-01-16

申请号：US18902073

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Jianglin Wu ,  Qi Wu

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

Abstract: A positive electrode material, including a substrate and a first region located on a surface of the substrate, where a molar ratio of iodine element to nickel element in the first region is 0.25 to 1.5. In this application, iodine ion lattice doping is introduced into the surface layer of the positive electrode material, so that the structural stability of the positive electrode material under high temperatures and high voltages and the kinetic performance under large-rate charge/discharge conditions are effectively improved, thereby reducing gas production in high-temperature and high-voltage storage and temperature rise under large-rate charge/discharge conditions of the electrochemical device, and improving the comprehensive performance of the electrochemical device.

公开(公告)号：US20240243280A1

公开(公告)日：2024-07-18

申请号：US18622196

申请日：2024-03-29

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Ye Lang ,  Yuhao Lu

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/505 ,  H01M10/04 ,  H01M10/44

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0427 ,  H01M10/446 ,  H01M10/448 ,  H01M2004/028

Abstract: A positive electrode material, including a lithium transition metal oxide. As tested by X-ray diffractometry, a full width at half maximum FWHM(101) of a (101) crystal plane diffraction peak and a full width at half maximum FWHM(104) of a (104) crystal plane diffraction peak of the positive electrode material satisfy: FWHM(101)/FWHM(104)≤0.7. This application further provides an electrochemical device and an electronic device that includes the positive electrode material. The positive electrode material is of excellent structural stability under high temperature and high voltage, and is of excellent kinetic performance under high-rate charging and discharging conditions.

公开(公告)号：US20240239690A1

公开(公告)日：2024-07-18

申请号：US18622079

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Ye Lang

IPC: C01G53/00 ,  H01M4/525

CPC classification number: C01G53/50 ,  C01G53/40 ,  C01G53/68 ,  H01M4/525 ,  C01P2002/52 ,  C01P2002/74 ,  C01P2002/82 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/40

Abstract: A metal hydroxide includes Ni element. An axial lattice constant c Å of the metal hydroxide satisfies: 0.363x+4.2≤c≤0.363x+4.4, where, based on a total molar mass of a metal element in the metal hydroxide, a molar percentage of the Ni element in the metal hydroxide is x. The lattice constant c of the metal hydroxide falls within a specified value range. The positive electrode material prepared from the metal hydroxide serving as a precursor is of excellent structural stability in a charging and discharging environment, and improves the cycle performance, high-temperature performance, and safety performance of lithium-ion batteries.

公开(公告)号：US20240266531A1

公开(公告)日：2024-08-08

申请号：US18622359

申请日：2024-03-29

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Ye Lang ,  Leimin Xu

IPC: H01M4/525 ,  C30B29/22 ,  H01M4/02 ,  H01M4/36

CPC classification number: H01M4/525 ,  C30B29/22 ,  H01M4/364 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode material includes first monocrystalline particles, and the first monocrystalline particle has a first length-diameter ratio L1, where L1 satisfies 2≤L1≤5. The positive electrode material includes the first monocrystalline particle having the first length-diameter ratio L1, and a high length-diameter ratio of the first monocrystalline particle is conducive to reducing active crystal planes which cause side reactions on a surface of the positive electrode material, and suppressing structural phase change and interface side reactions of the positive electrode material, which leads to improved cycling performance and storage performance of the electrochemical apparatus at high voltage and high temperature.

公开(公告)号：US20240266530A1

公开(公告)日：2024-08-08

申请号：US18621481

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Ye Lang ,  Leimin Xu

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/505 ,  H01M10/04 ,  H01M10/44

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0427 ,  H01M10/44 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode material, when an electrode including such positive electrode material is assembled with lithium metal to form a button cell and the button cell is charged and discharged at a current of 0.04 C in the voltage range of 2.8 V to 4.5 V, a differential capacity versus voltage dQ/dV curve obtained has a first oxidation peak and a first reduction peak in a range of 4.2 V to 4.5 V. The positive electrode material has high energy density as well as improved kinetic performance and high-temperature stability.