Positive electrode active material and preparation method thereof, positive electrode plate, battery and electric device

By regulating the proportion of components in the positive electrode active material, more Cu ions enter the crystal lattice, reducing CuO heterogeneous phases, improving the cycle stability and specific capacity of lithium-ion batteries, solving the problem of increasing CuO heterogeneous phases in lithium-ion batteries .

CN119181797AActive Publication Date: 2024-12-24CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
View PDF 10 Cites 0 Cited by

Patent Information

Application Number
CN202310745269.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-06-21
Publication Date
2024-12-24
Estimated Expiration
2043-06-21

AI Technical Summary

Technical Problem

The increase in CuO heterophase caused by copper doping in lithium-ion batteries reduces the specific capacity and cycling stability of the layered oxide.

Method used

By regulating the proportion of each component in the positive electrode active material NaxMnaCubM1cM3eO2+f-gRg, more Cu ions enter the crystal lattice of the layered oxide, reducing the content of CuO heterophase, and improving cyclic stability and specific capacity.

Benefits of technology

While improving the cycle stability of the positive electrode active material, it is achieved, and the specific capacity is enhanced, and the content of CuO heterophase is reduced, thereby improving the electrochemical performance of the battery.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119181797A_ABST
    Figure CN119181797A_ABST
Patent Text Reader

Abstract

The invention discloses a positive active material and a preparation method thereof, a positive pole piece, a battery and an electric device. The positive active material includes: NaxMnaCubM1 cM2 dM3eO2 + f-gRg, where M1 includes an element capable of forming a cation having a valence state less than or equal to positive divalence; m2 comprises an element capable of forming positive trivalent cations; m3 comprises elements capable of forming positive ions with the valence state larger than or equal to positive tetravalence, R comprises VIIA family elements, 0.67 < = x < = 1.2, a + b + c + d + e = 1, a > 0, b > 0, c > = 0, d > = 0, e > = 0,-0.1 < = f < = 0.1, 0 < = g < = 0.05, and # imgabs0. The positive electrode active material is beneficial for enabling more copper to enter crystal lattices of the positive electrode active material, the cycling stability of the positive electrode active material is improved, meanwhile, the content of CuO impure phases is reduced, and the service life of the positive electrode active material is prolonged. The specific capacity of the positive electrode active material is improved.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Positive active material, positive plate and sodium ion battery

    CN111435740A

  • Positive electrode active material, positive electrode plate and sodium ion battery

    CN111435742A

  • Positive electrode active material, preparation method thereof and sodium ion battery

    CN111554919A

  • Positive electrode active material, positive electrode plate and sodium ion battery

    CN115472818A

  • Positive electrode active material and preparation method thereof, positive electrode plate and sodium ion battery

    CN115498177A