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Alkaline mode cobalt vanadate micrometer sheet material and preparation method thereof

A technology of cobalt vanadate and micron flakes, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve the effect of mild reaction conditions, simple process and controllable conditions

Active Publication Date: 2017-05-31
SHIJIAZHUANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the rapid development of nano / micro technology, materials with regular two-dimensional structure sheet and layer structure have been widely used in military, heavy industry and light industry due to their unique optical, mechanical, electromagnetic and gas-sensing properties. , petrochemical and other fields have shown a wide range of application prospects, and gradually attracted extensive attention from researchers, making it an important frontier research field in the world. co 3 (OH) 2 V 2 o 7 2H 2 O material

Method used

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  • Alkaline mode cobalt vanadate micrometer sheet material and preparation method thereof
  • Alkaline mode cobalt vanadate micrometer sheet material and preparation method thereof
  • Alkaline mode cobalt vanadate micrometer sheet material and preparation method thereof

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Embodiment 1

[0027] At room temperature, respectively dissolve 2 mmol of ammonium metavanadate into 8 mL of distilled water, dissolve 1 mmol of cobalt acetate into 8 mL of distilled water, and add the ammonium metavanadate solution dropwise to the cobalt acetate solution under magnetic stirring. Continue to stir for 10 min after the dropwise addition, then transfer to a 25 mL hydrothermal reaction kettle, seal it, place it in a constant temperature box and conduct a hydrothermal reaction at 180 °C for 6 h, cool to room temperature after the reaction, and rinse with deionized water and absolute ethanol were centrifuged and washed 5 times, and the obtained precipitate was dried in an oven at 80°C for 8 hours to obtain the product.

[0028] The above product was subjected to X-ray diffraction (XRD) analysis, figure 1 is the XRD spectrum. The diffraction peaks of the product do not match the substances containing Co, V, O, and H in the existing JCPDS-ICDD database, but the intensity and posit...

Embodiment 2

[0030]At room temperature, dissolve 1.8 mmol of ammonium metavanadate in 14 mL of distilled water, dissolve 1 mmol of cobalt acetate in 2 mL of distilled water, and add the ammonium metavanadate solution dropwise to the cobalt acetate solution under magnetic stirring. Stir for 10 min, then transfer to a 20 mL hydrothermal reaction kettle, seal it and place it in a thermostat for 12 hours at 180 °C for hydrothermal reaction, cool to room temperature after the reaction, and centrifuge with deionized water and absolute ethanol, respectively After washing 5 times, place in an oven and dry at 80°C for 12 hours to obtain basic cobalt vanadate microsheet material. The above product was subjected to X-ray diffraction (XRD) analysis, Figure 5 Be XRD spectrum figure, its XRD spectrum is identical with embodiment 1, based on the same analysis of embodiment 1, its product is Co 3 (OH) 2 V 2 o 7 2H 2 O. Image 6 It is a scanning electron microscope analysis picture, which shows that...

Embodiment 3

[0032] At room temperature, dissolve 1 mmol of ammonium metavanadate in 14 mL of distilled water, dissolve 0.5 mmol of cobalt acetate in 2 mL of distilled water, and add the ammonium metavanadate solution dropwise to the cobalt acetate solution under magnetic stirring. Continue to stir for 10 min after the dropwise addition, then transfer to a 20 mL hydrothermal reaction kettle, seal it and place it in a constant temperature box for hydrothermal reaction at 160 °C for 6 hours, cool to room temperature after the reaction, and use deionized water and no Water and ethanol were centrifuged and washed 5 times, and the obtained precipitate was dried in an oven at 80°C for 8 hours to obtain basic cobalt vanadate microsheet materials. The above product was subjected to X-ray diffraction (XRD) analysis, Figure 7 Be XRD spectrum figure, its XRD spectrum is identical with embodiment 1, based on the same analysis of embodiment 1, its product is Co 3 (OH) 2 V 2 o 7 2H 2 O.

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Abstract

The invention discloses an alkaline mode cobalt vanadate micrometer sheet material and a preparation method thereof and belongs to the field of new energy materials. Chemical constitution of the alkaline mode cobalt vanadate micrometer sheet material is Co3(OH) 2V2O7.2H2O, the alkaline mode cobalt vanadate micrometer sheet is of a regular hexagonal structure, and the diameter is 0.5 to 2mu m. The preparation method of the alkaline mode cobalt vanadate micrometer sheet materials comprises the steps: (1) preparing cobaltous acetate and metavanadic acid into a mixed solution according to a molar ratio of Co to V as 1 to (1 to 2); (2) evenly stirring and reacting for 2 to 24h in 150 to 180 DEG C to obtain coarse product solution; (3) cooling the coarse product solution obtained in the step (2) to room temperature and washing and drying obtained precipitate to obtain the alkaline mode cobalt vanadate micrometer sheet material. The alkaline mode cobalt vanadate micrometer sheet material is synthesized through a one-step hydrothermal method and a wet method, and no any surface active agent and no any formwork is utilized in a preparation process; thus, the alkaline mode cobalt vanadate micrometer sheet material has moderate reaction condition, simple technology and suitability for batch production; when the alkaline mode cobalt vanadate micrometer sheet material is assembled into a battery to test electrochemical performance, a result that the alkaline mode cobalt vanadate micrometer sheet material has stable discharge capacity when being used as negative electrode active matter of lithium ion secondary battery is found.

Description

technical field [0001] The invention belongs to the field of inorganic materials and preparation methods thereof, and in particular relates to a basic cobalt vanadate microsheet material with a hexagonal sheet shape and a preparation method thereof. Background technique [0002] Cobalt vanadate is an inorganic compound with excellent chemical stability, heat resistance and good crystallization properties. The application prospect has aroused people's extensive research interest. According to the different proportions of Co, V, and O in the material, a variety of cobalt vanadate materials with different compositions and structures can be obtained. At present, the research on cobalt vanadate materials mainly includes Co 2 V 2 o 7 、CoV 2 o 6 、Co 3 V 2 o 8 Wait. Among them, there are few research reports on cobalt basic vanadate nano / micro materials. [0003] In recent years, with the rapid development of nano / micro technology, materials with regular two-dimensional s...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/5825H01M10/0525Y02E60/10
Inventor 张绍岩郧海丽高岩磊侯梦华候玲玲
Owner SHIJIAZHUANG UNIVERSITY
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