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Multiphase-doped nickel-cobalt-manganese ternary anode material and preparation method and application thereof

A cathode material, nickel-cobalt-manganese technology, which is applied in the field of complex-phase doped nickel-cobalt-manganese ternary cathode materials and their preparation, can solve the problems of difficulty in taking into account the multi-dimensional improvement of material properties, single technical goals, etc., and achieve improved structural stability. properties, promoting the mass transfer process, and slowing down the effect of stress and strain

Inactive Publication Date: 2019-05-17
GUANGDONG BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical goal of the doping process commonly used at this stage is too single, and it is difficult to take into account the multi-dimensional improvement of material performance

Method used

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  • Multiphase-doped nickel-cobalt-manganese ternary anode material and preparation method and application thereof
  • Multiphase-doped nickel-cobalt-manganese ternary anode material and preparation method and application thereof
  • Multiphase-doped nickel-cobalt-manganese ternary anode material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1 The preparation method of the multi-phase doped nickel-cobalt-manganese ternary positive electrode material is: nickel sulfate, cobalt sulfate, and manganese sulfate are dissolved in deionized water according to the molar ratio of 5:2:3, and sodium hydroxide is used as a precipitating agent. Ammonia water was used as a complexing agent to prepare nickel-cobalt-manganese precursors by co-precipitation method. After the precursor is uniformly mixed with the lithium source and the composite additive composed of boric acid and strontium oxide, it is calcined at 950° C. for 12 hours to obtain the target product. Among them, the lithium source is Li 2 CO 3 , the lithium ratio is 1.08 (that is, the molar ratio Li / Me=1.08, Me is the sum of transition metals Ni, Co, and Mn), the additive boric acid is 0.1% of the total mass of the nickel-cobalt-manganese precursor, and strontium oxide is the nickel-cobalt-manganese precursor 0.1% of the total mass of the body.

[00...

Embodiment 2

[0042] Example 2 The preparation method of the multiphase doped nickel-cobalt-manganese ternary positive electrode material is as follows: nickel nitrate, cobalt nitrate, and manganese nitrate are dissolved in deionized water according to the molar ratio of 55:15:30, and sodium carbonate is used as a precipitating agent, ammonia water As a complexing agent, nickel-cobalt-manganese precursors were prepared by co-precipitation method. After the precursor is uniformly mixed with the lithium source and the composite additive composed of antimony oxide and strontium oxide, it is calcined at 930° C. for 13 hours to obtain the target product. Among them, the lithium source is Li 2 CO 3 , the lithium ratio is 1.1 (that is, the molar ratio Li / Me=1.1, Me is the sum of the transition metals Ni, Co, and Mn), the additive antimony oxide is 0.9% of the total mass of the nickel-cobalt-manganese precursor, and the strontium oxide is nickel-cobalt-manganese 1.3% of the total mass of the prec...

Embodiment 3

[0047] Example 3 The preparation method of the multiphase doped nickel-cobalt-manganese ternary positive electrode material is as follows: nickel nitrate, cobalt nitrate, and manganese nitrate are dissolved in deionized water according to the molar ratio of 6:2:2, and sodium hydroxide is used as a precipitating agent. Ammonia water was used as a complexing agent to prepare nickel-cobalt-manganese precursors by co-precipitation method. After the precursor is uniformly mixed with the lithium source and the composite additive composed of bismuth oxide and neodymium oxide, it is calcined at 920° C. for 15 hours to obtain the target product. Among them, LiOH is selected as the lithium source, the lithium ratio is 1.3 (that is, the molar ratio Li / Me=1.3, and Me is the sum of transition metals Ni, Co, and Mn), and the additive boron oxide is 0.3% of the total mass of the nickel-cobalt-manganese precursor. Zirconia is 0.35% of the total mass of the nickel-cobalt-manganese precursor. ...

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Abstract

The invention discloses a multiphase-doped nickel-cobalt-manganese ternary anode material and a preparation method and application thereof. The chemical expression of the multiphase-doped nickel-cobalt-manganese ternary anode material is Li<delta>Ni<x>Co<y>Mn<z>MNO<2>, wherein the following relations are met: 0.9<=delta<=1.3; 0.33<=x<=0.98; 0.02<=y<=0.4; 0.02<=z<=0.4; x+y+z=1; a>0, b>0, and0.0024<=a+b<=0.042; M is a principal element in a melting additive; and N is a principal element in a strong chemical-bond energy additive. Meanwhile, the invention discloses the preparation method ofthe multiphase-doped nickel-cobalt-manganese ternary anode material and also discloses application of the multiphase-doped nickel-cobalt-manganese ternary anode material. According to the prepared multiphase-doped nickel-cobalt-manganese ternary anode material, the use effectiveness of the anode material is improved multi-dimensionally by use of the synergistic effect among doped elements.

Description

technical field [0001] The invention relates to a multi-phase doped nickel-cobalt-manganese ternary positive electrode material and a preparation method and application thereof, belonging to the technical field of lithium-ion battery materials. Background technique [0002] As an efficient energy conversion method, lithium-ion batteries are undoubtedly the general trend of current development to improve their energy density, safety, and light weight. At present, the methods for improving the energy density of lithium-ion batteries mainly include the following approaches: 1) increasing the working voltage of the battery and increasing the number of lithium ions participating in the electrochemical reaction; Thickness, to reduce the proportion of inactive substances; 3) Reduce the content of inactive substances, such as reducing the thickness of separators, current collectors, etc.; 4) Develop positive and negative materials with higher energy densities, etc. Among them, incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCY02E60/10
Inventor 汪乾唐盛贺阮丁山刘婧婧李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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