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Nano composite material as well as preparation method and application thereof

A nanocomposite material and metal nanotechnology, which is applied in the field of zinc secondary battery negative electrode materials and its preparation, can solve the problems of uneven modification and easy falling off, and achieve low cost, ensure uniformity, and improve the effect of hydrogen evolution overpotential

Active Publication Date: 2018-11-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the current metal oxide modified zinc oxide, there are shortcomings of uneven modification and easy falling off

Method used

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  • Nano composite material as well as preparation method and application thereof
  • Nano composite material as well as preparation method and application thereof
  • Nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Weigh 2.5g of zinc acetate powder and 100mgBi(NO 3 ) 3 ·5H 2 O was added to 50ml of ethylene glycol solution, stirred for 1h to fully dissolve the two, and then 1g of glucose was added to the mixed solution as a reducing agent to obtain a transparent mixed solution.

[0049] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 10°C / min, and after hydroheating at a temperature of 150°C for 3 hours, use water cooling to rapidly reduce it to room temperature.

[0050] (3) Filter and separate the obtained hydrothermal product to obtain a brown precursor powder, then put the precursor into 100ml of ethanol and sonicate for 10 minutes, repeatedly wash and filter three times, and then put the precursor in an oven to dry for 8 hours stand-by.

[0051] (4) Finally, put the obtained precursor powder into a high-temperature resistance furnace, maintain a heating rate of 3° C. / min, an...

Embodiment 2

[0057] (1) Weigh 4g of zinc acetate powder and 400mg of In(NO 3 ) 3 Add it to 70ml of glycerol solution, stir for 1.5h to fully dissolve the two, and then add 1.3g of fructose as a reducing agent to the mixed solution to obtain a transparent mixed solution.

[0058] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 14°C / min, and after hydroheating at a temperature of 160°C for 5 hours, use water cooling to rapidly reduce it to room temperature.

[0059] (3) Filter and separate the obtained hydrothermal product to obtain brown precursor powder, then put the precursor into 100ml of deionized water and ultrasonic for 15min, wash and filter three times repeatedly, then put the precursor into an oven to dry for 10h stand-by.

[0060] (4) Finally, put the obtained precursor powder into a high-temperature resistance furnace, maintain a heating rate of 5° C. / min, and calcinate at 600° C. f...

Embodiment 3

[0066] (1) Weigh 4.5g of zinc acetate powder and 500mg of SnCl in proportion 2 2H 2 O was added to 50ml of ethylene glycol solution, stirred for 2h to fully dissolve the two, and then 1g of glucose was added to the mixed solution as a reducing agent to obtain a transparent mixed solution.

[0067] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 18°C / min, and after 7 hours of hydroheating at a temperature of 180°C, use water cooling to rapidly reduce it to room temperature.

[0068] (3) Filter and separate the obtained hydrothermal product to obtain a brown precursor powder, then put the precursor into 100ml of methanol and ultrasonicate for 20min, wash and filter three times repeatedly, and then put the precursor into an oven to dry for 10h stand-by.

[0069] (4) Finally, put the obtained precursor powder into a high-temperature resistance furnace, maintain a heating rate of 8° C...

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Abstract

The invention in particular relates to a nano composite material as well as a preparation method and application thereof. The nano composite material is prepared from nano zinc oxide with the granularity of 200 to 600nm and other metal nano oxide with the granularity of 10 to 30nm; in a mixture composed of the nano zinc oxide and the other metal nano oxide, the mass percent content of the nano zinc oxide is 70 percent to 95 percent, and the mass percent content of the other metal nano oxide is 5 percent to 30 percent. The preparation method of the nano composite material comprises the following steps: adding a reducing agent, and combining a solvothermal method with a rapid cooling technology to obtain a product. According to the nano composite material, a preparation technology is simple;after the obtained product is assembled to form a battery, the average specific capacity is 625mAh g<-1> after the battery is circulated for 120 circles under the multiplying power of 1C, and the coulombic efficiency reaches 94.8 percent; the product has good anticorrosion performance. By adopting the nano composite material, the anticorrosion performance of a zinc negative electrode can be improved and the marketization of zinc-based secondary batteries is facilitated.

Description

technical field [0001] The invention relates to the technical field of design, preparation and application of a nanocomposite material, in particular to a zinc secondary battery negative electrode material and a preparation method thereof. technical background [0002] The development of new low-cost, green, safe and reliable secondary power batteries has become a research hotspot in various countries. Compared with commercialized lithium-ion batteries, aqueous zinc secondary batteries represented by zinc-air and zinc-nickel have the advantages of stable working voltage, high energy density and power density, and no memory effect. Will produce toxic substances, easy to recycle. Moreover, zinc resource reserves are abundant and the cost is relatively low, so zinc secondary batteries have broad market prospects. [0003] However, the reason currently hindering the market application of zinc secondary batteries is that the zinc negative electrode has severe hydrogen evolution...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62B82Y30/00
CPCB82Y30/00H01M4/362H01M4/48H01M4/628Y02E60/10
Inventor 田忠良赖延清赵泽军辛鑫郭伟昌张凯李劼
Owner CENT SOUTH UNIV
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