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Preparation method of nano cobalt-zinc composite oxide

A composite oxide, nano-cobalt technology, 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 anode materials, poor cycle performance, etc. question

Inactive Publication Date: 2014-03-05
新疆教育学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of nano cobalt-zinc composite oxide
  • Preparation method of nano cobalt-zinc composite oxide
  • Preparation method of nano cobalt-zinc composite oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] a. Dissolve 1 g of tetrabutylammonium bromide in a mixture of 1.5 ml of n-amyl alcohol and 30 ml of cyclohexane, stir for 30 minutes, and then add a mixture of zinc acetate and cobalt acetate in 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 a concentration of 3 mol / LKOH solution to the mixed solution obtained in step a, adjust pH 7.5-8.5 until the solution is slightly alkaline, and precipitation occurs, then transfer the solution containing the precipitation into an autoclave, control The reaction temperature was 130°C, and the heating time was 6h;

[0019] c. Then at a temperature of 170°C, heat for 24h, filter to obtain a precipitate, wash the precipitate to neutrality, and then transfer it to a muffle furnace, control the temperature at 500°C, and heat for 6h to obtain black nano-cobalt zinc. complex oxide.

Embodiment 2

[0021] a. Dissolve 1 g of tetrabutylammonium bromide in a mixture of 1.5 ml of n-amyl alcohol and 30 ml of cyclohexane, stir for 30 minutes, and then add a mixture of zinc acetate and cobalt acetate in 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 a concentration of 3 mol / LKOH solution to the mixed solution obtained in step a, adjust pH 7.5-8.5 until the solution is slightly alkaline, and precipitation occurs, then transfer the solution containing the precipitation into an autoclave, control The reaction temperature was 140°C, and the heating time was 8h;

[0023] c. Then heat for 24h at a temperature of 170°C, filter to obtain a precipitate, wash the precipitate to neutrality, and then transfer it to a muffle furnace, control the temperature at 600°C, and heat for 10h to obtain black nano-cobalt zinc. complex oxide.

Embodiment 3

[0025] a. Dissolve 1 g of tetrabutylammonium bromide in a mixture of 1.5 ml of n-amyl alcohol and 30 ml of cyclohexane, stir for 30 minutes, and then add a mixture of zinc acetate and cobalt acetate in 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 a concentration of 3 mol / LKOH solution to the mixed solution obtained in step a, adjust pH 7.5-8.5 until the solution is slightly alkaline, and precipitation occurs, then transfer the solution containing the precipitation into an autoclave, control The reaction temperature was 150°C, and the heating time was 10h;

[0027] c. Then at a temperature of 170°C, heat for 24h, filter to obtain a precipitate, wash the precipitate to neutrality, and then transfer it to a muffle furnace, control the temperature at 700°C, and heat for 12h to obtain black nano-cobalt zinc. complex 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 nano-cobalt-zinc composite oxide. Background technique [0002] Lithium-ion secondary battery anode materials have undergone a research process from lithium metal to lithium alloys, carbon materials, and transition metal oxides. Metal lithium has certain safety hazards. Although the carbon material has a high lithium storage capacity (theoretical lithium storage capacity is 372 mA h / g), due to the lack of high temperature treatment, there are still defective structures in the carbon material, which makes the capacity change with the cycle. decay as it progresses. Therefore, while further improving carbon materials, it has become a research direction to find new lithium-ion battery anode materials with more reliable lithium storage capacity and higher capacity. With good cycle life and high reversible capacity, metal oxide anode materials have attracted extensive attention and become a hot research topi...

Claims

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Application Information

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Patent Type & Authority Applications(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
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