Cobalt-free high-nickel positive electrode material and preparation method thereof

A cathode material, high nickel technology, applied in battery electrodes, structural parts, electrical components, etc., can solve the problems of cycle stability to be further improved, uneven coating oxide, etc., to avoid cycle performance loss, good high and low temperature Cycle performance, high capacity effect

Active Publication Date: 2021-12-17
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the inhomogeneous coating oxide of the cobalt-free high-nickel positive electrode material in...

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  • Cobalt-free high-nickel positive electrode material and preparation method thereof
  • Cobalt-free high-nickel positive electrode material and preparation method thereof
  • Cobalt-free high-nickel positive electrode material and preparation method thereof

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Embodiment 1

[0042] This embodiment provides a cobalt-free high-nickel positive electrode material, the specific preparation method is as follows:

[0043] The electroless plating solution of present embodiment configuration 1L, gets 78gCuSO 4 ·5H 2 O,93gCu(NO 3 ) 2 ·6H 2 Dissolve O in deionized water, add 20g sodium citrate and 25g ammonium sulfate, and prepare an electroless plating solution with copper ion concentration of 40g / L, sodium citrate concentration of 20g / L, and ammonium sulfate concentration of 25g / L, using ammonia water Adjust the pH to 10, adjust the temperature of the water bath to 30°C, slowly add 50g of cobalt-free high-nickel cathode material substrate into the reaction vessel at a rotation speed of 300rpm, control the feeding rate to 20g / min, and filter the obtained reaction product after 4 hours of reaction , washed by centrifugation for 3 times, and fully dried in a 120°C blast drying oven to obtain an electroless plating coating material.

[0044] Calcination: ...

Embodiment 2

[0048] This embodiment provides a cobalt-free high-nickel positive electrode material, the specific preparation method is as follows:

[0049] The electroless plating solution of present embodiment configuration 1L, gets 186gCu (NO 3 ) 2 ·6H 2 Dissolve O in deionized water, add 20g sodium citrate and 25g ammonium sulfate, and prepare an electroless plating solution with copper ion concentration of 40g / L, sodium citrate concentration of 20g / L, and ammonium sulfate concentration of 25g / L, using ammonia water Adjust the pH to 10, adjust the temperature of the water bath to 30°C, and slowly add 50 g of cobalt-free high-nickel cathode material substrate into the reaction vessel at a speed of 300 rpm, control the feeding rate to 20 g / min, and react for 4 hours. Filter, centrifuge and wash 3 times, and fully dry in a blast drying oven at 120°C to obtain an electroless plating coating material.

[0050] Calcination: calcining the obtained electroless plating cladding material; the ...

Embodiment 3

[0052] This embodiment provides a cobalt-free high-nickel positive electrode material, the specific preparation method is as follows:

[0053] The electroless plating solution of present embodiment configuration 1L, gets 107gCuCl 2 2H 2 Dissolve O in deionized water, add 20g sodium citrate and 25g ammonium sulfate, and prepare an electroless plating solution with copper ion concentration of 40g / L, sodium citrate concentration of 20g / L, and ammonium sulfate concentration of 25g / L, using ammonia water Adjust the pH to 10, adjust the temperature of the water bath to 30°C, and slowly add 50g of cobalt-free and high-nickel cathode material into the reaction vessel at a speed of 300rpm, and control the feeding rate to 20g / min. After 4 hours of reaction, filter the obtained reaction product , washed by centrifugation for 3 times, and fully dried in a 120°C blast drying oven to obtain an electroless plating coating material.

[0054] Calcination: calcining the obtained electroless p...

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Abstract

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a cobalt-free high-nickel positive electrode material and a preparation method thereof. The method comprises the following steps: preparing a soluble salt solution of coating layer metal, adding a complexing agent, adjusting the pH value, adding a cobalt-free high-nickel positive electrode material matrix, carrying out chemical plating reaction, and carrying out solid-liquid separation, drying and calcining to obtain the cobalt-free high-nickel positive electrode material. According to the invention, a chemical plating reaction method is adopted for coating, the anode material subjected to one-time sintering enters a container for chemical reaction to form a metal compound, so that the surface is coated with a layer of compact metal oxide. Compared with the prior art, the method is advantageous in that: the high-temperature coating or precipitation method coating effect is good, the coating uniformity of chemical plating reaction is stronger, and the cycling stability of the material is better.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a cobalt-free high-nickel positive electrode material and a preparation method thereof. Background technique [0002] In recent years, the development of the power battery market has entered the fast lane, and people urgently need a cathode material with low cost, high energy density, high cycle performance and high safety. At present, the commonly used cathode material LiCoO on the market 2 And ternary materials (NCM) cannot meet the above conditions at the same time, the main reason is that the price of cobalt element continues to rise, and cobalt is also a non-environmentally friendly element. [0003] It is worth noting that the NM and NCM cathodes with the same Ni content have comparable discharge capacities at 0.1C, and at the same time, the NM cathode exhibits better cycle stability and thermal stability than NCM. Due to the elimination ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525
CPCH01M4/628H01M4/366H01M4/525H01M4/505H01M10/0525Y02E60/10
Inventor 郭丰杨红新李子郯乔齐齐施泽涛王鹏飞
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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