Particle size controllable manganous-manganic oxide nanoparticle material synthesized at constant temperature and preparation method thereof

A technology for the synthesis of manganese tetroxide at room temperature, which is applied in the directions of manganese oxide/hydroxide, nanotechnology, etc., can solve the problems of high requirements and complicated processes, and achieves mild and efficient synthesis process, easy separation, and optimized cycle performance. and charge-discharge performance

Inactive Publication Date: 2017-08-18
符策煌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Environmental protection, green, and low cost, but the process is complicated and the requirements are relatively high. It needs many conditions such as suspension decomposition kiln calcination, alkaline solution, etc.

Method used

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  • Particle size controllable manganous-manganic oxide nanoparticle material synthesized at constant temperature and preparation method thereof
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  • Particle size controllable manganous-manganic oxide nanoparticle material synthesized at constant temperature and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a controllable particle size manganese tetraoxide nanoparticle material synthesized at room temperature and a preparation method thereof. between. Its preparation steps are as follows:

[0032] 1. Use an electronic balance to weigh 3g of manganese acetate and ultrasonically disperse it into 180ml of ethanol;

[0033] 2. Use a magnetic stirrer to continue stirring until the solution no longer changes color;

[0034] 3. Use an electronic balance to weigh 1.5g of potassium hydroxide and ultrasonically disperse it into 20ml of ethanol;

[0035] 4. Add the ethanol solution of potassium hydroxide dropwise in the ethanol solution of manganese acetate;

[0036] 5. Use a magnetic stirrer to continue stirring for 24 hours;

[0037] 6. The dispersion system was centrifuged, washed with ethanol for 3 times, and dried to obtain a brown manganese tetraoxide nanoparticle material synthesized at room temperature with a controllable particle size.

[0038] ...

Embodiment 2

[0044] This embodiment provides a controllable particle size manganese tetraoxide nanoparticle material synthesized at room temperature and a preparation method thereof. between. Its preparation steps are as follows:

[0045] 1. Use an electronic balance to weigh 3g of manganese acetate and ultrasonically disperse it into 180ml of ethanol;

[0046] 2. Use a magnetic stirrer to continue stirring until the solution no longer changes color;

[0047] 3. Use an electronic balance to weigh 1.5g of potassium hydroxide and ultrasonically disperse it into 20ml of ethanol;

[0048] 4. Add the ethanol solution of potassium hydroxide dropwise in the ethanol solution of manganese acetate;

[0049] 5. Use a magnetic stirrer to continue stirring for 12 hours;

[0050] 6. Drop 3g of pure water into the above system;

[0051] 7. Use a magnetic stirrer to continue stirring for 12 hours;

[0052] 8. Centrifuge the above dispersion system, wash with ethanol for 3 times, and dry to obtain br...

Embodiment 3

[0058] This embodiment provides a controllable particle size manganese tetraoxide nanoparticle material synthesized at room temperature and a preparation method thereof, wherein the controllable particle size synthetic manganese tetraoxide nanoparticle material has a particle size of 2-30 nm between. Its preparation steps are as follows:

[0059] 1. Use an electronic balance to weigh 3g of manganese acetate and ultrasonically disperse it into 180ml of ethanol;

[0060] 2. Use a magnetic stirrer to continue stirring until the solution no longer changes color;

[0061] 3. Use an electronic balance to weigh 1.5g of potassium hydroxide and ultrasonically disperse it into 20ml of ethanol;

[0062] 4. Add the ethanol solution of potassium hydroxide dropwise in the ethanol solution of manganese acetate;

[0063] 5. Use a magnetic stirrer to continue stirring for 12 hours;

[0064] 6. Drop 10g of pure water into the above system;

[0065] 7. Use a magnetic stirrer to continue sti...

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Abstract

The invention discloses a particle size controllable manganous-manganic oxide nanoparticle material synthesized at a constant temperature and a preparation method thereof. The material is synthesized at the constant temperature in an alcohol phase environment from manganese acetate and strong alkali. The particle sizes of manganous-manganic oxide nanoparticles can be controlled at 2-50nm. The preparation method comprises the following steps of: separately dissolving manganese acetate and strong alkali in the alcohol phase environment firstly in a proportion, then stirring and mixing the two for 24h, and adding water to adjust the particle sizes of the particles; and then stirring the mixture for 12h, performing centrifugal separation on the obtained dispersing liquid, and cleaning and drying the mixture with ethanol to obtain a final product. According to an electrode material prepared from the manganous-manganic oxide nanoparticle material prepared by the method, the reversible capacity of the electrode material can reach 400mAh/g above if being charged and discharged for 60 times at a current density of 100mA/g, and the capacity of the electrode material is kept at 250mAh/g at the current density of 1000mA/g.

Description

technical field [0001] The invention relates to trimanganese tetraoxide and a preparation method thereof, which belong to the technical field of material synthesis, in particular to trimanganese tetraoxide with controllable particle size under green normal temperature conditions and a preparation method thereof. Background technique [0002] Trimanganese tetroxide (theoretical capacity: 937mAh / g) is one of the transition metal oxides. Due to its advantages of non-toxicity, low cost and abundant reserves in nature, it has become a hot spot in the research of lithium-ion electrode materials. The purity of battery-grade manganese tetraoxide is required to be over 99%, and it has the characteristics of special microscopic morphology, large specific surface area, and high tap density. Ordinary grade manganese tetraoxide cannot meet these requirements, which has led to the research of new preparation methods of manganese tetraoxide in related fields. [0003] In the prior art, pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y40/00
CPCC01G45/02C01P2004/03C01P2004/04C01P2004/64C01P2006/40
Inventor 符策煌潘浩李福气
Owner 符策煌
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