Positive electrode material and method of preparation and use thereof, positive electrode pole piece of lithium-ion battery and lithium-ion battery

ES3073120T3Undetermined Publication Date: 2026-07-08BEIJING EASPRING MATERIAL TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
ES · ES
Patent Type
Patents
Current Assignee / Owner
BEIJING EASPRING MATERIAL TECH CO LTD
Filing Date
2021-08-16
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

High nickel content in NCM cathode materials for lithium-ion batteries leads to micro-cracks, reducing structural, thermal, and cycling stability, and compromising the battery's performance.

Method used

A cathode material comprising multicrystal particles and single or quasi single crystal particles, with specific diameter ratios, is prepared through a controlled sintering process, and coated with a conductive layer to enhance strength and stability.

Benefits of technology

The cathode material exhibits high compaction density, compressive strength, and prolonged cycle life, maintaining high energy density and capacity while reducing micro-crack formation.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 00000017_0000
    Figure 00000017_0000
  • Figure 00000017_0001
    Figure 00000017_0001
  • Figure 00000018_0000
    Figure 00000018_0000
Patent Text Reader

Abstract

The present invention relates to the technical field of secondary batteries. A positive electrode material, a method of preparation and use thereof, a positive electrode pole piece for lithium-ion batteries, and a lithium-ion battery are disclosed. The positive electrode material comprises polycrystalline particles A and monocrystalline particles or monocrystalline silicon particles B. The particle sizes D5, D50, and D95 ​​of the positive electrode material satisfy the relationship shown in formula I: 1.5 ≤ K95 = (D95 - D5) / D50 ≤ 2.5.The present positive electrode material comprises polycrystalline particles A and monocrystalline particles or monocrystalline silicon particles B, which significantly inhibits the occurrence of microcracks in the positive electrode material and improves the strength of the particles of the positive electrode material, allowing the positive electrode material to have a high compaction density and high compressive strength, and ensuring that a battery containing the positive electrode material has a high volumetric energy density and a long service life.
Need to check novelty before this filing date? Find Prior Art