Multiphase composite high-nickel ternary positive electrode material and preparation method thereof

A positive electrode material and high-nickel technology, which is applied in the field of multi-phase composite high-nickel ternary positive electrode materials and its preparation, can solve the problems of increased Ni/Li mixing degree, reduced electrochemical performance of materials, poor structural stability, etc., to achieve Reduce particle breakage, improve the first charge and discharge efficiency, and stabilize the structure
CN110350164AActive Publication Date: 2019-10-18HUNAN ZHENGYUAN ENERGY STORAGE MATERIALS & DEVICE INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN ZHENGYUAN ENERGY STORAGE MATERIALS & DEVICE INST
Publication Date
2019-10-18

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Abstract

The invention belongs to the field of batteries, and particularly relates to a multiphase composite high-nickel ternary positive electrode material and a preparation method thereof. The material is formed by bonding a 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix and a single-ion conductor polymer, and has a 3D cross-linked interpenetrating netty core-shell structure. The required preparation method comprises the following steps: 1) carrying out gradient temperature reaction on a solution A, a solution B and a solution C in a reaction kettle, andthen carrying out high-temperature treatment to obtain the 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix; and 2) carrying out in-situ growth on lithiumaminobenzenesulfonate, an alcohol polymer, isocyanate and the 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix in the reaction kettle, and carrying out annealing treatment to obtain the multi-phase composite high-nickel ternary positive electrode material. The multi-phase composite high-nickel ternary positive electrode material prepared by the preparation method is good in cycling performance, easy for size mixing of a lithium ion battery, excellent in rate performance and low-temperature performance, and stable in structure; and the process is simple and easy to operate, and is environment-friendly.
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Description

technical field

[0001] The invention belongs to the field of batteries, and in particular relates to a multiphase composite high-nickel ternary positive electrode material and a preparation method thereof. Background technique

[0002] In recent years, lithium-ion batteries have been widely used due to their high energy density, high charging voltage, long cycle life, small self-discharge, wide temperature resistance, and environmental protection. The performance of lithium-ion batteries is mainly determined by their positive electrode materials. Decide.

[0003] The ternary cathode material LiNixCoyMnzO2 (x+y+z=1) has the advantages of high energy density, simple preparation method, and relatively low raw material cost. It has become the most promising cathode material for power batteries after lithium iron phosphate. According to the requirements of the National Development and Reform Commission's "Three-Year Action Plan for Enhancing Manufacturing Core Competitiveness (2...

Claims

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