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A kind of nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof

A nickel-cobalt-manganese and cathode technology is applied in the field of nickel-cobalt-manganese ternary cathode spherical materials and their preparation, which can solve the problems of large pollution and high difficulty in operation, achieve simple operation process, easy operation, and improve energy density and cycle stability. Effect

Active Publication Date: 2022-04-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY CO LTD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, the present invention provides a nickel-cobalt-manganese ternary positive electrode spherical material, in which a flux, a fluorine source and nano-mesoporous silica are introduced into the nickel-cobalt-manganese positive electrode material to prepare nickel-cobalt containing mesoporous silica Manganese ternary cathode spherical material, while improving the energy density and cycle stability of the material, optimizes the preparation method and solves the problems of large pollution and difficult operation

Method used

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  • A kind of nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof
  • A kind of nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof
  • A kind of nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof

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Embodiment 1

[0034] According to the molar ratio n(Ni+Co+Mn):n(Li)=0.3, take a total of 100kg of nickel-cobalt-manganese ternary precursor (622 type) and lithium source, and take 10kg V at the same time 2 o 5 , 40kg of nano-mesoporous silica, put the above materials into a high-mixer and mix for 2 hours to obtain a mixture; calcinate the mixture at 900°C for 12 hours in an air-filled roller furnace, and then crush and classify it, then put it into Mix and coat with 1kg of VDF in a high mixer for 1 hour; then calcinate in an air-filled roller furnace at 400°C for 5 hours. The secondary sintered material is crushed, classified, screened and demagnetized in sequence to obtain the finished product. Take the finished product for SEM characterization results see figure 1 ,Depend on figure 1 It can be seen that the positive electrode material particles are uniformly spherical and compact in structure.

Embodiment 2

[0036] According to the molar ratio n(Ni+Co+Mn):n(Li)=0.4, take a total of 100kg of nickel-cobalt-manganese ternary precursor (type 622) and lithium source, and take 12kg V at the same time 2 o 5 , 40kg of nano-mesoporous silica, put the above materials into a high-mixer and mix for 2 hours to obtain a mixture; calcinate the mixture at 900°C for 13 hours in an air-filled roller furnace, and then crush and classify it, then put it into Mix and coat with 0.8kg of VDF in a high mixer for 1 hour; then calcinate in an air-filled roller furnace at 400°C for 7 hours. The secondary sintered material is crushed, classified, screened and demagnetized in sequence to obtain the finished product. Take the finished product for SEM characterization results see figure 2 , it can be seen from Figure 2 that the positive electrode material particles are uniformly spherical and compact in structure.

Embodiment 3

[0038] According to the molar ratio n(Ni+Co+Mn):n(Li)=0.3, take a total of 100kg of nickel-cobalt-manganese ternary precursor (type 622) and lithium source, and take 15kg V at the same time 2 o 5 , 30kg of nano-mesoporous silica, put the above materials into a high mixer and mix for 2 hours to obtain a mixture; calcinate the mixture at 850°C for 15 hours in an air-filled roller furnace, and then pulverize and classify, then put into Mix and coat with 0.6kg of VDF in a high mixer for 1 hour; then calcinate at 400°C for 5 hours in an air-filled roller furnace. The secondary sintered material is crushed, classified, screened and demagnetized in sequence to obtain the finished product. Take the finished product for SEM characterization results see image 3 , it can be seen from Figure 3 that the positive electrode material particles are uniformly spherical and compact in structure.

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Abstract

The invention discloses a nickel-cobalt-manganese ternary positive electrode spherical material and a preparation method thereof, comprising the following steps: mixing a nickel-cobalt-manganese ternary precursor, a lithium source, a flux and nanometer mesoporous silicon dioxide to obtain a mixture; After the mixed material is calcined once, it is pulverized and classified to obtain a graded material; after the graded material is mixed and coated with a fluorine source, it is calcined a second time to obtain a nickel-cobalt-manganese ternary positive electrode spherical material. Introduce flux, fluorine source and nano-mesoporous silica into the nickel-cobalt-manganese cathode material to prepare the nickel-cobalt-manganese ternary cathode spherical material containing mesoporous silica, which makes the electrical properties, stability and structure of the material stable performance was improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a nickel-cobalt-manganese ternary positive electrode spherical material and a preparation method thereof. Background technique [0002] The electric vehicle industry is booming, and batteries, as one of the core accessories, have received extensive research and attention. Due to the advantages of high energy density, long cycle life and no memory effect, lithium-ion batteries have always been a hot spot in the research and development of batteries, and have good application prospects in portable appliances, electric vehicles and energy storage. Ternary cathode materials have the advantages of high capacity and high energy density and become the current research hotspot of cathode materials. However, ternary material batteries have problems such as poor safety and cycle life, which requires further improvement of ternary materials. [0003] A preparation method of a fluorine-dope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 许奎
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY CO LTD CO LTD
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