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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 material and its preparation, which can solve the problems of high difficulty in operation and large pollution, and achieve the effects of simple operation process, improved electrical performance, and removal of residual alkali.

Active Publication Date: 2019-06-11
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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  • Nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof
  • Nickel-cobalt-manganese ternary positive electrode spherical material and preparation method thereof
  • 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 crush and classify it, then put it 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. The preparation method comprises the following steps: mixing a nickel-cobalt-manganese ternary precursor, a lithium source, a fluxing agent and nano-mesoporous silica to obtain a mixture; after the mixture is calcined for one time, crushing and classifying the mixture to obtain a grading material; and after the grading material and a fluorine source are mixed and coated, carrying out secondary calcination to obtain the nickel-cobalt-manganese ternary positive electrode spherical material. The fluxing agent, the fluorine source and nano-mesoporous silica are introduced into the nickel-cobalt-manganese positive electrode material, and the nickel-cobalt-manganese ternary positive electrode spherical material containing mesoporous silica is prepared, so that the electrical performance, the stability and the structural stability of the material are 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 Applications(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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