公开(公告)号：US20220123291A1

公开(公告)日：2022-04-21

申请号：US17281046

申请日：2020-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Kai WANG ,  Fei ZHANG ,  Meng WANG ,  Leimin XU

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: A positive electrode material includes a lithium composite oxide, and the positive electrode material comprises stress relief particles. There are cavities inside the stress relief particles, and the cavities are closed structures. The positive electrode material that includes the stress relief particles can be used to effectively tackle a stress and relieve the stress in advance, relieve a strain of the positive electrode material used at a high voltage, avoid ruptures of particles of the positive electrode material, and enhance structural stability of the positive electrode material. The positive electrode material and the electrochemical device having the positive electrode material achieve good high-voltage cycle performance and cycle stability.

公开(公告)号：US20200185715A1

公开(公告)日：2020-06-11

申请号：US16429999

申请日：2019-06-03

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Fei ZHANG ,  Leimin XU ,  Meng WANG ,  Pengwei CHEN

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/04 ,  C01G53/00

Abstract: The present application relates to a cathode material and an electrochemical device comprising the same. The cathode material comprises a matrix and a coating layer. The matrix comprises a cathode active material capable of reversibly intercalating or deintercalating lithium ions, and the coating layer comprises an organic material having a general formula X—R—CnFaClb, wherein R is a hydrocarbyl and X is a siloxane group. The coating layer can not only reduce the side reaction between the electrolyte and the cathode active material in the electrochemical device, but can also act as a lithium ion conductor layer to accelerate the intercalating or deintercalating of the lithium ions. Therefore, the cathode material coated by the above coating layer has excellent rate performance and impedance characteristics while having excellent cycle stability.

公开(公告)号：US20220216481A1

公开(公告)日：2022-07-07

申请号：US17700909

申请日：2022-03-22

Applicant: Ningde Amperex Technology Limited

Inventor： Fei ZHANG ,  Kai WANG ,  Leimin XU ,  Meng WANG

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

Abstract: A positive electrode material, an electrochemical device that uses same, and an electronic device. Specifically, a positive is a layered structure. The layered structure includes a strip-like structure containing an atom cluster. The positive electrode material according to this application helps to improve cycle performance and storage performance of the electrochemical device under a high voltage working condition.