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公开(公告)号：US20240421296A1
公开(公告)日：2024-12-19
申请号：US18815853
申请日：2024-08-27
Inventor： Zongpu SHAO , Yafei LIU , Haoran YANG , Juntao HU , Yanbin CHEN
Abstract: The present application relates to the technical field of sodium-ion batteries. Provided are a sodium-ion cathode material, a preparation method and use thereof, a sodium-ion battery, a sodium-ion battery pack, and a device. The sodium-ion cathode material includes a matrix and a coating layer coated on the matrix. The matrix has a composition represented by formula I: Na1−x[NiyMnzMu]TivO2 formula I. The coating layer has a composition represented by formula II: Na2−βTi6−αM′αO13 formula II. The sodium-ion cathode material has characteristics of high ionic and electronic conductivity, strong structural stability, and strong chemical stability. At the same time, applying the composite cathode material to the sodium-ion batteries can effectively improve electrochemical performance of the battery.
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公开(公告)号：US20240204173A1
公开(公告)日：2024-06-20
申请号：US18286305
申请日：2022-06-28
Inventor： Jingpeng WANG , Juntao HU , Yuqiang JIN , Chuangjiang NI , Xuequan ZHANG , Yafei LIU , Yanbin CHEN
CPC classification number: H01M4/366 , C01G53/50 , H01M4/505 , H01M4/525 , C01P2002/52 , C01P2004/03 , C01P2004/84 , C01P2006/16 , C01P2006/40
Abstract: The present disclosure relates to a positive electrode material and the preparation method therefor. The positive electrode material in accordance with the present disclosure is in a form of secondary particles having a core and a shell, wherein the core has a porosity greater than that of the shell. By forming larger particle voids in the cores of secondary particles, the present invention may reduce the stress concentration due to the volume deformation during the lithium ion intercalation/deintercalation, and improve the stability, rate performance, safety and cycle life of the material, which makes the material particularly suitable for lithium-ion batteries of high energy density.
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