Processing method for improving conductivity of high-nickel ternary cathode material of lithium battery

A positive electrode material and processing method technology, applied in the direction of battery electrodes, electrical components, secondary batteries, etc., can solve the problems of poor electrical conductivity and large internal resistance, and achieve the effect of improving electrical conductivity and solving weak adhesion

Inactive Publication Date: 2019-05-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0010] Aiming at the defect that the high-nickel ternary positive electrode material of the lithium battery that is currently widely used has a large internal resistance and poor conductivity, the present invention proposes a treatment method for improving the conductivity of the high-nickel ternary positive electrode material of the lithium battery, thereby effectively reducing the The internal resistance of the positive electrode material ensures the conductivity of the positive electrode material during use

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  • Processing method for improving conductivity of high-nickel ternary cathode material of lithium battery

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Experimental program
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Effect test

Embodiment 1

[0032] The processing process is:

[0033] (1) Add nickel foam to an ethanol solution containing cobalt acetate and manganese acetate, then mix and stir, and fully absorb to obtain the product after adsorption; wherein, 35 parts by weight of nickel foam, 11 parts by weight of cobalt acetate, and 11 parts by weight of manganese acetate , 43 parts by weight of ethanol;

[0034] (2) Mix the adsorbed product obtained in step (1) with a strong oxidizing agent and a solid base, then pre-calcine, add a lithium source after the material is completely solidified, then sinter at a high temperature, and cool after the end to obtain a three-dimensional network High-nickel ternary cathode material; strong oxidant is potassium permanganate; solid base is magnesium oxide; lithium source is lithium carbonate; The temperature of the first stage is 660°C, the time is 6.5h, the temperature of the second stage is 930°C, and the time is 6.5h; among them, 59 parts by weight of the product after ad...

Embodiment 2

[0040] The processing process is:

[0041](1) Add nickel foam to the ethanol solution containing cobalt acetate and manganese acetate, then mix and stir, fully adsorb, and obtain the product after adsorption; wherein, 33 parts by weight of nickel foam, 11 parts by weight of cobalt acetate, and 11 parts by weight of manganese acetate , 45 parts by weight of ethanol;

[0042] (2) Mix the adsorbed product obtained in step (1) with a strong oxidizing agent and a solid base, then pre-calcine, add a lithium source after the material is completely solidified, then sinter at a high temperature, and cool after the end to obtain a three-dimensional network High-nickel ternary cathode material; strong oxidant is persulfate; solid base is alumina; lithium source is lithium hydroxide; The temperature of the first stage is 630°C, the time is 7h, the temperature of the second stage is 910°C, and the time is 7h; among them, 62 parts by weight of the product after adsorption, 9 parts by weigh...

Embodiment 3

[0048] The processing process is:

[0049] (1) Add nickel foam to the ethanol solution containing cobalt acetate and manganese acetate, then mix and stir, fully adsorb, and obtain the product after adsorption; wherein, 35 parts by weight of nickel foam, 13 parts by weight of cobalt acetate, and 12 parts by weight of manganese acetate , 40 parts by weight of ethanol;

[0050] (2) Mix the adsorbed product obtained in step (1) with a strong oxidizing agent and a solid base, then pre-calcine, add a lithium source after the material is completely solidified, then sinter at a high temperature, and cool after the end to obtain a three-dimensional network High-nickel ternary cathode material; strong oxidant is chlorate; solid base is calcium oxide; lithium source is lithium nitrate; The temperature is 680°C, the time is 6h, the temperature of the second stage is 940°C, and the time is 6h; wherein, 53 parts by weight of the product after adsorption, 11 parts by weight of strong oxidan...

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Abstract

The invention provides a processing method for improving the conductivity of a high-nickel ternary cathode material of a lithium battery. The method comprises adding nickel foam to a solution containing cobalt acetate and manganese acetate; then mixing and pre-firing the mixture with a strong oxidant and a solid alkali; after solidification, adding a lithium source for high-temperature sintering to obtain a three-dimensional net-shaped high-nickel ternary cathode material; impregnating a conductive paste, performing curing at a low temperature so as to obtain the high-nickel ternary cathode material improved in conductivity. The method, by preparing the cathode material of the three-dimensional net-shaped structure, solves the defects that a traditional cathode material conductive agent and the cathode material are not firmly bonded due to the change of a material volume during the use, and the internal resistance is increased, and improves the conductive properties of the cathode material.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to positive electrode materials, in particular to a treatment method for improving the conductivity of high-nickel ternary positive electrode materials of lithium batteries. Background technique [0002] Lithium-ion batteries are a new generation of secondary batteries developed rapidly in the 1990s. Due to their high specific energy, light weight, and small memory effect, they have become the main carrier of a new generation of energy. The manufacture of battery materials is the core link in the lithium battery industry. Battery materials are divided into positive electrode materials, negative electrode materials, separators, electrolytes, etc. Cathode material is one of the key materials in the manufacture of lithium-ion batteries, and its performance directly affects various performance indicators of the battery, occupying a core position in lithium-ion batteries. [0003] At p...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525H01M4/02
CPCY02E60/10
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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