Preparation method of organic liquid phase spray in-situ coated positive electrode material
By using an organic liquid phase spray in-situ coating method, the challenges of high capacity, long cycle life, and low cost of ternary cathode materials have been solved, achieving uniform coating and environmentally friendly production, thus improving the performance and economy of the materials.
CN115602803BActive Publication Date: 2026-07-17ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
- Filing Date
- 2021-07-09
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing ternary cathode materials face challenges in terms of high capacity, long cycle life, and low cost. Dry coating suffers from uneven mechanical coating, while wet coating is costly and causes environmental pollution.
Method used
An organic liquid phase spray in-situ coating method is adopted, in which a compound of the target coating element is dissolved in an organic solvent and uniformly coated onto a ternary cathode material matrix by spraying. The cathode material is then dried and sintered to prepare a uniformly coated cathode material.
Benefits of technology
This achieves improved coating uniformity, reduced production costs, reduced environmental pollution risks, and enhanced material recycling performance and stability.
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Figure CN115602803B_ABST
Abstract
The application belongs to the technical field of secondary batteries, and particularly relates to a preparation method of an organic liquid phase spray in-situ coated positive electrode material. The method is that a target coating element is dissolved in a small amount of solvent, sprayed on a ternary positive electrode material substrate in a mixing machine through a spraying function of the mixing machine, mixed and coated, dried and sintered, and then treated to obtain the organic liquid phase spray in-situ coated ternary positive electrode material. The amount of solvent used is small, the energy and mechanical consumption for solvent evaporation and recovery are reduced, and the production cost is reduced. Liquid water is not used in the coating experiment, and the dissolution of Li + in the material is greatly avoided. The spray coated positive electrode material prepared by the application has a uniform surface coating, reduces the contact between transition elements and electrolyte, reduces side reactions, reduces the dissolution of transition elements, greatly improves the cycle performance and stability of the material.
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