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Preparation method of high nickel type ternary positive electrode material doped with rubidium elements

A technology of element doping and positive electrode material, applied in positive electrodes, electrical components, battery electrodes, etc., can solve the problems of material rate performance decline, material energy density, and ternary material nickel content, etc., and achieve good rate performance. and the effect of cycle performance

Inactive Publication Date: 2019-10-18
光鼎铷业(广州)集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new method allows for more precise control over adding different materials during production than previous methods that had trouble controlling their properties or making them evenly distributed throughout it.

Problems solved by technology

This patents discuss how current high-strength NiMn type (Ni) mangano composite negative elec trodes have limitations due to their instability when charged or discharging at very large currencies like electric cars. To solve these issues, there needs an improved way for producing stable high-capacity Lithium ion batteries that could be applied more frequently without sacrificial environmental impacts.

Method used

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  • Preparation method of high nickel type ternary positive electrode material doped with rubidium elements
  • Preparation method of high nickel type ternary positive electrode material doped with rubidium elements
  • Preparation method of high nickel type ternary positive electrode material doped with rubidium elements

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Embodiment 1

[0024] A method for preparing a high-nickel type ternary positive electrode material doped with rubidium element, the specific steps are as follows:

[0025] Step 1, nickel nitrate, cobalt carbonate (CoCO 3 ), manganese nitrate was added to deionized water at a molar ratio of 6:2:2, stirred for 1 hour to obtain a mixed salt solution with a total mass fraction of 10 wt%; prepare a 10 wt% sodium hydroxide solution;

[0026] In a nitrogen atmosphere, add sodium hydroxide solution to the mixed salt solution, adjust the pH to 10, and stir for 2 hours to obtain a precursor precipitate; the precursor precipitate is aged, filtered, washed with deionized water, centrifuged, and dried in an oven After 12 hours. It is a pure ternary material precursor, and its chemical expression is Ni 0.6 co 0.2 mn 0.2 (OH) 2 ;

[0027] In step 2, the ternary material precursor, lithium carbonate, and rubidium hydroxide will be obtained (the molar ratio of the lithium and rubidium elements to the ...

Embodiment 2

[0034] A method for preparing a high-nickel type ternary positive electrode material doped with rubidium element, the specific steps are as follows:

[0035] Step 1, nickel nitrate, cobalt carbonate (CoCO 3 ), manganese nitrate was added to deionized water at a molar ratio of 6:2:2, stirred for 1 hour to obtain a mixed salt solution with a total mass fraction of 10 wt%; prepare a 10 wt% sodium hydroxide solution;

[0036] Under a nitrogen atmosphere, add sodium hydroxide solution to the mixed salt solution, adjust the pH to 11, and stir for 2 hours to obtain a precursor precipitate; the precursor precipitate is aged, filtered, washed with deionized water, centrifuged, and dried in an oven After 12 hours. It is a pure ternary material precursor, and its chemical expression is Ni 0.6 co 0.2 mn 0.2 (OH) 2 ;

[0037] In step 2, the ternary material precursor, lithium carbonate, and rubidium hydroxide will be obtained (the molar ratio of the lithium and rubidium elements to t...

Embodiment 3

[0041] A method for preparing a high-nickel type ternary positive electrode material doped with rubidium element, the specific steps are as follows:

[0042] Step 1, adding nickel nitrate, cobalt carbonate, and manganese carbonate into deionized water in a molar ratio of 6:2:2, and stirring for 1 hour to obtain a mixed salt solution with a total mass fraction of 10 wt%; prepare a 10 wt% sodium hydroxide solution;

[0043] In a nitrogen atmosphere, add sodium hydroxide solution to the mixed salt solution, adjust the pH to 10, and stir for 2 hours to obtain a precursor precipitate; the precursor precipitate is aged, filtered, washed with deionized water, centrifuged, and dried in an oven After 12 hours. It is a pure ternary material precursor, and its chemical expression is Ni 0.6 co 0.2 mn 0.2 (OH) 2 ;

[0044] In step 2, the ternary material precursor, lithium carbonate, and rubidium hydroxide will be obtained (the molar ratio of the lithium and rubidium elements to the n...

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Abstract

The invention relates to a preparation method of a high nickel type ternary positive electrode material doped with rubidium elements. The method is characterized in that (1), precursor of a nickel-cobalt-manganese ternary material is prepared by a chemical co-precipitation method; and (2), the nickel-cobalt-manganese ternary material precursor is uniformly mixed with rubidium compound and lithiumsalt, and then the high nickel type ternary positive electrode material is obtained by multistage calcination. The method is advantaged in that the material structure stability is improved while relatively high energy density is kept, the ternary material doped with the rubidium elements is applied to a lithium battery, and high rate performance and discharge capacity are achieved.

Description

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Claims

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Application Information

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Owner 光鼎铷业(广州)集团有限公司
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