Gradient doped cobaltosic oxide material and preparation method thereof

A technology of cobalt tetroxide and gradient doping, which is applied in the directions of cobalt oxide/cobalt hydroxide, electrical components, battery electrodes, etc., can solve the problems of reduced battery capacity and unstable structure, and achieves a simple preparation method, improved structural stability, and improved doping. high clutter effect

Active Publication Date: 2018-06-29
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to LiCoO 2 The material preparation process will greatly continue the structural characteristics and physical and chemical properties of cobalt tetraoxide, so the surface and internal structure of lithium cobalt oxide synthesized without doping or conventional uniform doping are exactly the same. This feature will lead to: 1.

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  • Gradient doped cobaltosic oxide material and preparation method thereof
  • Gradient doped cobaltosic oxide material and preparation method thereof
  • Gradient doped cobaltosic oxide material and preparation method thereof

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preparation example Construction

[0031] The invention discloses a preparation method of a gradient doped cobalt tetroxide material, comprising the following steps:

[0032] Step 1, mixing the cobalt salt solution with a precipitant to prepare a preprecipitate A;

[0033] Step 2, adding a salt solution containing a doping element to the above reaction system to obtain a doping precipitate B;

[0034] Step 3, post-processing the doped precipitate B to obtain gradiently doped tricobalt tetroxide.

[0035] In step 1, add the cobalt salt solution and the precipitant solution into the reaction vessel, stir, and react at a set temperature to prepare the preprecipitate A.

[0036] In a preferred embodiment, the cobalt salt solution is an aqueous cobalt salt solution, and the cobalt salt is selected from any one or more of cobalt chloride, cobalt nitrate, cobalt sulfate and cobalt acetate;

[0037] The precipitation agent is mixed with the cobalt salt solution in the form of an aqueous solution, and the precipitatio...

Embodiment 1

[0064] Prepare cobalt nitrate solution, the concentration of cobalt in the solution is 80g / L, ammoniacal liquor is added in sodium hydroxide solution to make precipitant solution, wherein the content of sodium hydroxide in the precipitant solution is 100g / L, ammoniacal liquor content is 25g / L ; The cobalt nitrate solution and the precipitant solution are added to the reaction vessel in a co-current manner to react, the co-current volume ratio of the cobalt nitrate solution and the precipitant solution is 1: (1.1~1.4), and the reaction pH value is 8.5~10.5 , the reaction temperature is 60°C, and the reaction time is 30h;

[0065] Prepare a salt solution containing doping element ions, the doping element Ni content is 0.15g / L, add the salt solution containing doping element ions into the reaction vessel for reaction, the reaction pH value is 8.5-10.5, and the reaction temperature is 60 °C, the reaction time is 10h;

[0066] The reaction product cobalt hydroxide precipitate was ...

Embodiment 2

[0069] Preparation of cobalt nitrate solution, the concentration of cobalt in the solution is 80g / L; ammoniacal liquor is added in the sodium hydroxide solution to make precipitant solution, wherein the content of sodium hydroxide in the precipitant solution is 100g / L, ammonia water content is 25g / L ; The cobalt nitrate solution and the precipitant solution are added to the reaction vessel in a co-current manner to react, the co-current volume ratio of the cobalt nitrate solution and the precipitant solution is 1: (1.1~1.4), and the reaction pH value is 8.5~10.5 , the reaction temperature is 60°C, and the reaction time is 30h;

[0070] Prepare a salt solution containing doping element ions, the doping element Al content is 0.15g / L; add the salt solution containing doping element ions into the reaction vessel for reaction, the reaction pH value is 8.5-10.5, and the reaction temperature is 60 °C, the reaction time is 10h;

[0071] The cobalt hydroxide precipitate obtained from ...

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Abstract

The invention discloses a gradient doped cobaltosic oxide material and a preparation method thereof. The preparation method comprises the following steps: mixing a cobalt solution with a precipitationagent so as to obtain a pre-precipitate A; further putting a salt solution with doping elements into the reaction system so as to obtain a doped precipitate B; and finally calcining the doped precipitate B at a certain temperature, thereby obtaining gradient doped cobaltosic oxide. The gradient doped cobaltosic oxide material is prepared in a coprecipitation mode, the preparation method is simple, controllable in condition and convenient in industrial production, and the prepared gradient doped cobaltosic oxide material has great significance for improving structural stability and electricityof anode materials.

Description

technical field [0001] The invention relates to the field of new energy batteries, in particular to a gradient doped cobalt tetroxide material and a preparation method thereof. Background technique [0002] Compared with traditional secondary batteries such as lead-acid batteries, nickel-cadmium batteries, and nickel-manganese batteries, lithium-ion batteries have obvious advantages in terms of specific power, energy density, and charge-discharge performance. Moreover, lithium-ion batteries also have the advantages of long cycle life, low automatic discharge rate, and "green" environmental protection. At present, they have been widely used in small electrical appliances, and are actively applied to electric vehicles, static backup power supplies, and defense industries. develop. The further improvement of lithium-ion battery technology and performance mainly depends on the improvement and development of various component materials in the battery and the innovation of batter...

Claims

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Application Information

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IPC IPC(8): C01G51/04H01M4/525
CPCC01G51/04C01P2004/03C01P2004/32C01P2004/61C01P2006/40H01M4/525H01M2004/021Y02E60/10
Inventor 魏卫白珍辉高利亭卢兴华朱晓沛吴剑文周宏宝周玉林江卫军苏迎春
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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