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Modified high-nickel ternary positive electrode material and preparation method and application thereof

A positive electrode material, high-nickel technology, applied in the field of electrochemistry, can solve problems such as loss, and achieve the effects of low cost, simple process, and excellent cycle stability

Active Publication Date: 2019-02-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the current prior art, the treatment methods for excessive residual alkali on the surface of high-nickel ternary materials have the defect of reducing the residual alkali by losing capacity. Therefore, it is urgent to provide a modified high-nickel ternary positive electrode material to improve electrode performance. Material performance

Method used

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  • Modified high-nickel ternary positive electrode material and preparation method and application thereof

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Effect test

Embodiment 1

[0038] This implementation provides a modified LiNi 0.8 co 0.1 mn 0.1 o 2 The preparation method of ternary cathode material, it comprises the following steps:

[0039] Step 1, dissolve 10.7121g lithium acetate in 100ml deionized water to prepare 1mol / L lithium acetate solution, respectively dissolve 19.9072g nickel acetate, 2.4509g manganese acetate, and 2.4908g cobalt acetate in deionized water to prepare 1mol / L Solution, slowly add the two solutions into the beaker using a constant flow pump, adjust the pH between 7-8 with ammonia water during the reaction, and stir magnetically for 60 minutes after the reaction is completed;

[0040] Step 2: Weigh 1.5803g of potassium permanganate solid, dissolve it in deionized water and make up to 100ml, and prepare a 0.1mol / L potassium permanganate solution; stir at 25°C for 1 hour to form a uniform and stable potassium permanganate solution;

[0041] Step 3: Add 20ml of 0.1mol / L potassium permanganate solution to the mixed reactio...

Embodiment 2

[0054] This embodiment provides a modified LiNi 0.8 co 0.1 mn 0.1 o 2 The preparation method of ternary cathode material comprises the following steps:

[0055] Step 1, dissolve 10.7121g lithium acetate in 100ml deionized water to prepare 1mol / L lithium acetate solution, respectively dissolve 19.9072g nickel acetate, 2.4509g manganese acetate, and 2.4908g cobalt acetate in deionized water to prepare 1mol / L Solution, slowly add the two solutions into the beaker using a constant flow pump, adjust the pH between 7-8 with ammonia water during the reaction, and stir magnetically for 60 minutes after the reaction is completed;

[0056] Step 2: Weigh 3.1606g of potassium permanganate solid, dissolve it in deionized water to 100ml, and prepare a 0.2mol / L potassium permanganate solution; stir at 25°C for 1 hour to form a uniform and stable potassium permanganate solution;

[0057] Step 3: Add 20ml of 0.2mol / L potassium permanganate solution to the mixed reaction solution in step 1...

Embodiment 3

[0059] This embodiment provides a modified LiNi 0.8 co 0.1 Al 0.1 o 2 The preparation method of ternary cathode material comprises the following steps:

[0060] Step 1, dissolve 7.2397g lithium nitrate in 100ml deionized water and prepare 1mol / L lithium acetate solution, respectively dissolve 23.2648g nickel nitrate, 3.7531g aluminum nitrate, and 2.9105g cobalt nitrate in deionized water to prepare 1mol / L Solution, slowly add the two solutions into the beaker using a constant flow pump, adjust the pH between 7-8 with ammonia water during the reaction, and stir magnetically for 60 minutes after the reaction is completed;

[0061] Step 2: Weigh 3.1606g of potassium permanganate solid, dissolve it in deionized water to 100ml, and prepare a 0.2mol / L potassium permanganate solution; stir at 25°C for 1 hour to form a uniform and stable potassium permanganate solution;

[0062] Step 3: Add 20ml of 0.2mol / L potassium permanganate solution to the mixed reaction solution in step 1,...

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Abstract

The invention provides a modified high-nickel ternary positive electrode material and a preparation method and application thereof. The preparation method of the modified high-nickel ternary positiveelectrode material includes the steps of preparing a high-nickel ternary mesophase solution and dissolving an acidic solid in water to obtain an acidic solution; mixing the two solutions above uniformly, carrying out calcination after a hydrothermal or solvothermal reaction, and obtaining the modified high-nickel ternary positive electrode material after cooling, grinding and sieving. The modifiedhigh-nickel ternary positive electrode material is simple in preparation process and low in cost, and the method can effectively remove residual alkali on the surface of the high-nickel ternary positive electrode material; the prepared modified high-nickel ternary positive electrode material has excellent cycle stability and can be widely applied to ternary positive electrode materials of nickelbatteries.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a modified high-nickel ternary positive electrode material and a preparation method and application thereof. Background technique [0002] With the rapid development of the power lithium-ion battery market, the positive electrode material of the battery has gradually become the focus of industrialization research. Among them, the ternary nickel-cobalt-manganese 811 material with high nickel The characteristics become the focus of the next step of industrialization. However, the high-nickel ternary material is easy to absorb water during the slurry mixing and coating process, resulting in a jelly-like slurry, which deteriorates the processing performance and affects the performance of the electrode material. The higher the nickel content, the greater the residual alkali on the surface of the material. affect its industrialization. [0003] At present, the treatment meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 张冉张宏立高二平
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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