Multicomponent material, positive electrode material, and secondary battery

By controlling the intensity ratio and particle size distribution of Raman spectral characteristic peaks of multi-component materials, and combining them with specific chemical compositions, the problem of high lithium-ion diffusion barriers during the sintering process of multi-component materials was solved, and the preparation of low-energy-consumption and high-stability cathode materials was achieved.

CN122800607APending Publication Date: 2026-09-22BTR (JIANGSU) NEW MATERIAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202611233431.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-14
Publication Date
2026-09-22

AI Technical Summary

Technical Problem

In existing technologies, lithium-ion diffusion barriers are high in multi-element materials during sintering, leading to excessive energy loss and weak structural stability of the cathode material.

Method used

By controlling the Raman spectral characteristic peak intensity ratio of the multi-element material to be 0.5~2, the volume ratio of particles with a particle size ≤1μm to be 5%~20%, and the thermal weight loss rate to be ≤25%, and by using multi-element materials with specific chemical compositions, including elements such as Ni, Co, Mn, and Al, an appropriate amount of O-Me-O bonds are formed to promote lithium ion diffusion and improve structural stability.

Benefits of technology

The sintering temperature was lowered, which improved the structural stability, capacity and rate performance of the cathode material, reduced energy consumption and improved cycle performance.

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Abstract

The application discloses a multi-element material, a positive electrode material and a secondary battery, and relates to the technical field of secondary batteries. The multi-element material comprises at least two elements in Ni, Co, Mn and Al; the multi-element material is characterized by a Raman spectrum, the Raman spectrum of the multi-element material comprises a first characteristic peak and a second characteristic peak, the peak position of the first characteristic peak is 500cm ‑1 ~600cm ‑1 , the peak position of the second characteristic peak is 600cm ‑1 ~700cm ‑1 , and the ratio of the peak intensity of the first characteristic peak to the peak intensity of the second characteristic peak is 0.5-2, so as to solve the problem that in the prior art, the lithium ion diffusion potential barrier of the multi-element material is high during a sintering process, lithium diffusion is uneven, and the electrochemical performance of the positive electrode material is reduced.
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