Ningde Amperex Technology Limited

Kai Wang

Meng Wang

Leimin Xu

Fei Zhang

Pengwei Chen

Tao Li

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.

Positive electrode material, electrochemical device that uses same, and electronic device

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.

Positive electrode material, electrochemical device containing same, electronic device, and method for preparing the positive electrode material

The present application relates to a cathode material and an electrochemical device comprising the same. In particular, the present application relates to a cathode material having a surface heterophasic structure, wherein the cathode material includes a lithium cobalt oxide and an oxide of cobalt, wherein a Raman spectrum of the cathode material has characteristic peaks in the range of about 470 cmto about 530 cm, about 560 cmto about 630 cmand about 650 cmto about 750 cm, and wherein the surface heterophasic structure of the cathode material includes the lithium cobalt oxide and the oxide of cobalt. The electrochemical device using the cathode material having a surface heterophasic structure of the present application can exhibit excellent cycle performance and thermal stability.

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Ningde, China

Kai Wang