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A kind of preparation method of nanometer cobalt-zinc composite oxide

A composite oxide and nano-cobalt technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of high cost, affecting the practical application of metal oxide negative electrode materials, poor cycle performance, etc. question

Inactive Publication Date: 2016-01-13
新疆教育学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of ZnO are high irreversible capacity and poor cycle performance, while Co 3 o 4 The main disadvantage is the high cost, which affects the practical application of metal oxide anode materials, and overcoming these disadvantages is the focus of current research in the field of metal oxide anode materials

Method used

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  • A kind of preparation method of nanometer cobalt-zinc composite oxide
  • A kind of preparation method of nanometer cobalt-zinc composite oxide
  • A kind of preparation method of nanometer cobalt-zinc composite oxide

Examples

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Embodiment 1

[0017] a. Dissolve 1g of tetrabutylammonium bromide in a mixture of 1.5ml of n-pentanol and 30ml of cyclohexane, stir for 30 minutes, then add a mixture of zinc acetate and cobalt acetate with a volume ratio of 1:1 after stirring and mixing Solution, wherein the concentration of zinc acetate is 0.3mol / L, and the concentration of cobalt acetate is 0.1mol / L;

[0018] b. Add dropwise the concentration of 3mol / L KOH solution to the mixed solution obtained in step a, adjust the pH to 7.5-8.5 until the solution is slightly alkaline, and precipitate occurs, and then the solution containing the precipitate is transferred to the high-pressure reactor and controlled The reaction temperature is 130°C, and the heating time is 6h;

[0019] c. Then heat at 170°C for 24 hours, filter to obtain the precipitate, wash the precipitate until neutral, and then transfer it to a muffle furnace, control the temperature at 500°C, and heat for 6 hours to obtain black nano-cobalt zinc composite oxides....

Embodiment 2

[0021] a. Dissolve 1g of tetrabutylammonium bromide in a mixture of 1.5ml of n-pentanol and 30ml of cyclohexane, stir for 30 minutes, then add a mixture of zinc acetate and cobalt acetate with a volume ratio of 1:1 after stirring and mixing Solution, wherein the concentration of zinc acetate is 0.3mol / L, and the concentration of cobalt acetate is 0.1mol / L;

[0022] b. Add dropwise the concentration of 3mol / L KOH solution to the mixed solution obtained in step a, adjust the pH to 7.5-8.5 until the solution is slightly alkaline, and precipitate occurs, and then the solution containing the precipitate is transferred to the high-pressure reactor and controlled The reaction temperature is 140°C, and the heating time is 8h;

[0023] c. Then heat at 170°C for 24 hours, filter to obtain the precipitate, wash the precipitate until neutral, and then transfer it to a muffle furnace, control the temperature at 600°C, and heat for 10 hours to obtain black nano-cobalt zinc composite oxides...

Embodiment 3

[0025] a. Dissolve 1g of tetrabutylammonium bromide in a mixture of 1.5ml of n-pentanol and 30ml of cyclohexane, stir for 30 minutes, then add a mixture of zinc acetate and cobalt acetate with a volume ratio of 1:1 after stirring and mixing Solution, wherein the concentration of zinc acetate is 0.3mol / L, and the concentration of cobalt acetate is 0.1mol / L;

[0026] b. Add dropwise the concentration of 3mol / L KOH solution to the mixed solution obtained in step a, adjust the pH to 7.5-8.5 until the solution is slightly alkaline, and precipitate occurs, and then the solution containing the precipitate is transferred to the high-pressure reactor and controlled The reaction temperature is 150°C, and the heating time is 10h;

[0027] c. Then heat at 170°C for 24 hours, filter to obtain the precipitate, wash the precipitate until neutral, and then transfer it to a muffle furnace, control the temperature at 700°C, and heat for 12 hours to obtain black nano-cobalt zinc composite oxide...

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Abstract

The invention relates to a preparation method of nano cobalt-zinc composite oxide. The preparation method comprises the steps of dissolving tetrabutylammonium bromide in a mixed solution of n-pentanol and cyclohexane; stirring and then adding a mixed solution of zinc acetate and cobalt acetate, which is uniformly mixed by stirring; dropwise adding a KOH solution; adjusting the pH value until the solution is slightly alkaline; transferring the solution containing a deposit into an autoclave, controlling the reaction temperature to be 130-150 DEG C, heating for 6-10 hours, and than heating for 24 hours at 170 DEG C; filtering to obtain a deposit; washing the deposit to be neutral; transferring the deposit into a muffle furnace, controlling the temperature to be 500-700 DEG C, and heating for 6-12 hours to obtain black nano cobalt-zinc composite oxide.

Description

technical field [0001] The invention relates to a preparation method of nanometer cobalt-zinc composite oxide. Background technique [0002] Lithium-ion secondary battery anode materials have gone through the research process from metallic lithium to lithium alloys, carbon materials, and transition metal oxides. Metal lithium has certain potential safety hazards. Although the lithium storage capacity of carbon materials is relatively high (theoretical lithium storage capacity is 372mA·h / g), due to the lack of high-temperature treatment, there are residual defective structures in the carbon materials, so that the capacity increases with the cycle. progress and decay. Therefore, while further improving carbon materials, it has become a research direction for people to find new lithium-ion battery anode materials with more reliable lithium storage capacity. With better cycle life and higher reversible capacity, metal oxide anode materials have attracted widespread attention a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/52B82Y30/00
CPCB82Y40/00H01M4/48Y02E60/10
Inventor 刘斌胡文胜陈理李亚娟
Owner 新疆教育学院