Method for coating lithium nickel manganese oxide with composite

A technology of lithium nickel manganese oxide and composite materials, which is applied in the field of battery material modification and preparation, can solve problems such as difficult to accurately control product composition and reaction rate, poor electrochemical cycle performance, and large drying shrinkage, so as to improve cycle and rate performance , Protect structure and thermal stability, reduce the effect of impurity phase formation
CN106299348AActive Publication Date: 2017-01-04HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI GUOXUAN HIGH TECH POWER ENERGY
Publication Date
2017-01-04

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Abstract

The invention discloses a method for coating lithium nickel manganese oxide with a composite, and belongs to the technical field of battery material modification and preparation. The method includes the steps that a lithium nickel manganese oxide precursor is prepared through a coprecipitation method and prepared into suspension, bismuth oxide and yttrium oxide in a certain proportion are added into the suspension, ball milling dispersion and drying are carried out, the dried material is subjected to roasting and annealing treatment in an air atmosphere, and the lithium nickel manganese oxide positive electrode material coated with the (Bi2O3)0.75(Y2O3)0.25 composite is obtained. The material prepared with the method is pure in phase and good in crystallinity, and industrial production of the material is easy; the surface of the lithium nickel manganese oxide material can be effectively coated with the (Bi2O3)0.75(Y2O3)0.25 composite to improve the cycle performance and rate capability of lithium-ion batteries; meanwhile, the coating layer can inhibit dissolution of manganese, reduce side reactions of the positive electrode material under high voltage and protect the structure and heat stability of the electrode material.
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Description

technical field

[0001] The invention relates to a lithium ion battery modification method, in particular to a method for coating lithium nickel manganese oxide with a composite material, and belongs to the technical field of battery material modification preparation. Background technique

[0002] Energy is an important material basis for the development of human society and is related to the peace and stability of human beings and the world. In the 21st century, the energy crisis and environmental degradation have become two major problems to be solved in the world today, and due to the rapid development of space technology, mobile communications, missiles, aerospace, electric vehicles and other fields, there is a sharp demand for high-performance non-polluting chemical power supplies increase. Lithium-ion batteries belong to the field of clean energy and have the advantages of good safety, good cycle performance, long life, non-toxic and pollution-free, making them the fir...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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