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Method for preparing nano hydroxyl manganese cobalt oxide

A cobalt manganese oxide and manganese cobalt oxide technology, applied in the field of nanomaterials, can solve problems such as being unfavorable to mass production, poor product stability, uneven reaction, etc., and achieve the effects of low cost, stable product quality, and good process repeatability.

Active Publication Date: 2017-02-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application 201210578760.1 discloses a method for preparing cobalt oxyhydroxide doped with trace amounts of manganese. The method is to add precipitants (KOH, NaOH, etc.) The cobalt oxyhydroxide of manganese, because this method adds precipitant and oxidizing agent in synthetic process can cause the inhomogeneity of reaction, product stability is relatively poor, and reaction needs to just be finished in a long period of time, and efficiency is not high, is unfavorable for carrying out large-scale production. mass production

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Embodiment 1

[0024] A method for preparing nanometer cobalt-manganese oxyhydroxides of the present invention comprises the following steps:

[0025] (1) Manganese acetate tetrahydrate and cobalt acetate tetrahydrate are dissolved in 200mL of deionized water, and the concentration of the prepared manganese acetate and cobalt acetate is 0.0125mol / L in the mixed solution;

[0026] (2) Utilize dilute sulfuric acid to adjust the pH value of the mixed solution to 2.5;

[0027] (3) At 35° C., pass ozone into the mixed solution treated in step (2), react for 1 hour, then centrifuge, wash, and finally dry at 80° C. to obtain a nanometer cobalt-manganese oxyhydroxide product.

[0028] The XRD pattern of the nanometer cobalt-manganese oxyhydroxide product prepared in this embodiment is as follows figure 1 Shown, show that product is cobalt manganese oxyhydroxide, and chemical formula is (Co a ,Mn 1-a )OOH, the standard card number is JCPDS 42-1316; the nano cobalt-manganese oxyhydroxide prepared i...

Embodiment 2

[0031] A method for preparing nanometer cobalt-manganese oxyhydroxides of the present invention comprises the following steps:

[0032] (1) Manganese acetate tetrahydrate and cobalt acetate tetrahydrate are dissolved in 200mL of deionized water, and the concentration of the prepared manganese acetate and cobalt acetate is 0.0125mol / L in the mixed solution;

[0033] (2) Utilize dilute sulfuric acid to adjust the pH value of the mixed solution to 3.5;

[0034] (3) At 35° C., pass ozone into the mixed solution treated in step (2), react for 45 minutes, then centrifuge, wash, and finally dry at 80° C. to obtain nanometer cobalt-manganese oxyhydroxide products.

[0035] The FESEM figure of the nano cobalt-manganese oxyhydroxide product prepared by the present embodiment is as follows figure 2 As shown, as can be seen from the figure, the nano-cobalt-manganese oxyhydroxide prepared in this embodiment is spherical, and the particle size is about 200nm; through XRD and XPS detection...

Embodiment 3

[0037] A method for preparing nanometer cobalt-manganese oxyhydroxides of the present invention comprises the following steps:

[0038] (1) Manganese acetate tetrahydrate and cobalt acetate tetrahydrate are dissolved in 200mL deionized water, and the manganese acetate and cobalt acetate mixed solution (concentration of manganese acetate in the mixed solution is 0.0125mol / L, and the concentration of cobalt acetate is 0.025mol / L);

[0039] (2) Utilize dilute sulfuric acid to adjust the pH value of the mixed solution to 2.5;

[0040] (3) At 70° C., pass ozone into the mixed solution treated in step (2), react for 1 hour, then centrifuge, wash, and finally dry at 80° C. to obtain nanometer cobalt-manganese oxyhydroxide products. The nano cobalt manganese oxyhydroxide prepared in this embodiment is spherical, and the particle diameter is about 123nm; Through XRD and XPS detection, show that the chemical formula of the nano cobalt manganese oxyhydroxide product of this embodiment ...

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Abstract

The invention discloses a method for preparing nano hydroxyl manganese cobalt oxide. The method comprises the following steps: (1) adjusting the pH (Potential of Hydrogen) value of a mixed solution of manganese acetate and cobalt acetate to 2.5 to 6; (2) introducing oxidizing gas into the mixed solution of the step (1) and carrying out an oxidization reaction; after the reaction, centrifuging, washing and drying to obtain the nano hydroxyl manganese cobalt oxide. By adopting the preparation method provided by the invention, the nano hydroxyl manganese cobalt oxide can be processed through one step; the nano hydroxyl manganese cobalt oxide can be applied to related fields of super-capacitors, lithium-ion batteries and the like. The preparation method provided by the invention has the advantages that raw materials are cheap and easy to obtain, the cost is low and a synthesis process is simple and easy to realize; the quality of a product is stable and the process repeatability is good; the reaction can be finished within relatively short time and the efficiency is high.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a method for preparing nanometer cobalt manganese oxyhydroxide. Background technique [0002] Hydroxy compounds of manganese and cobalt have very important uses in the fields of electrochemistry, batteries, and electrochromism. Manganese-cobalt oxyhydroxide can also be used as the precursor of Li-Mn-O spinel structure and manganese oxide compound of cobalt, and the manganese oxide compound of cobalt has very superior performance in secondary batteries and super capacitors, and has been received extensive attention from science and industry. Chinese patent application 201210578760.1 discloses a method for preparing cobalt oxyhydroxide doped with trace amounts of manganese. The method is to add precipitants (KOH, NaOH, etc.) The cobalt oxyhydroxide of manganese, because this method adds precipitant and oxidizing agent in synthetic process can cause the inhomogeneity of reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B82Y30/00H01G11/46H01M4/52H01M10/0525
CPCC01G51/00C01P2002/72C01P2004/03C01P2004/32C01P2004/62H01G11/46H01M4/523H01M10/0525Y02E60/10Y02E60/13
Inventor 田庆华王相郭学益
Owner CENT SOUTH UNIV
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