A kind of niobium pentoxide nanorod material with regular hollow square box shape and its preparation method and application

A niobium pentoxide and nanorod technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as slow diffusion of sodium ions, and achieve improved electrochemical performance, material The effect of stabilizing and increasing the specific surface area

Active Publication Date: 2018-07-27
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to improve the diffusion of sodium ions by changing the diffusion distance of the ions to improve the electrochemical performance of niobium pentoxide as the negative electrode material. Performance: Provide a preparation method of niobium pentoxide nanorod material with regular hollow square box shape with high rate performance, excellent cycle performance and stable structure. The preparation method has simple process, easy operation and low cost

Method used

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  • A kind of niobium pentoxide nanorod material with regular hollow square box shape and its preparation method and application
  • A kind of niobium pentoxide nanorod material with regular hollow square box shape and its preparation method and application
  • A kind of niobium pentoxide nanorod material with regular hollow square box shape and its preparation method and application

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Embodiment 1

[0031] The preparation method of niobium pentoxide nanorod material with regular hollow square box shape comprises the following steps: taking niobium oxalate as niobium source, under normal temperature, niobium oxalate is dissolved in 20ml deionized water to form solution A1; select mass ratio as 10:1 P123 and cetyltrimethylammonium bromide were dissolved in 40ml deionized water respectively to form solution B1; after the first stirring for 4 hours respectively; the stirred solution A1 and solution B1 were mixed to obtain niobium Mixed solution C1 with an ion concentration of 1.8mmol / L; continue to stir for 20 minutes, then transfer the mixed solution C1 to a reaction kettle, and conduct a hydrothermal reaction at a temperature of 160°C. After 20 hours of reaction, naturally cool to room temperature; The solution was moved to a centrifugal device for centrifugation, and the centrifuged solid matter was washed three times with deionized water and absolute ethanol, then put into...

Embodiment 2

[0034] The preparation method of niobium pentoxide nanorod material with regular hollow square box shape comprises the following steps: taking niobium chloride as niobium source, under normal temperature, niobium chloride is dissolved in 20ml deionized water to form solution A2; A mixture of P123 with cetyltrimethylammonium bromide and dodecyltrimethylammonium chloride in a ratio of 12:1, wherein cetyltrimethylammonium bromide and dodecyltrimethylammonium The mass ratio of methylammonium chloride is 1:1; respectively dissolved in 40ml deionized water to form solution B2; after the first stirring for 1 hour, the stirred solution A2 and solution B2 are mixed to obtain a niobium ion concentration of 1.01 mmol / L mixed solution C2; continue to stir for 60 minutes, then transfer the mixed solution C2 to the reaction kettle, carry out hydrothermal reaction at 120 ° C, react for 36 hours, and naturally cool to room temperature; move the reacted solution to the centrifuge Carry out cen...

Embodiment 3

[0036]The preparation method of niobium pentoxide nanorod material with regular hollow square box-like, comprises the following steps: take niobium acetate as niobium source, under normal temperature, niobium acetate is dissolved in 20ml deionized water, forms solution A3; Select mass ratio as A mixture of 20:1 P123 and cetyltrimethylammonium bromide, dodecyltrimethylammonium chloride and cetyltrimethylammonium chloride was dissolved in deionized water to obtain solution B3; Wherein, the mass ratio of cetyltrimethylammonium bromide, dodecyltrimethylammonium chloride and cetyltrimethylammonium chloride in solution B3 is 1:1:1; After stirring once for 24 hours, mix the stirred solution A3 and solution B3 to obtain a mixed solution C3 with a niobium ion concentration of 3.4mmol / L, continue to stir for 10min, then transfer the mixed solution C3 to the reaction kettle, and heat it at 200°C , carry out hydrothermal reaction, react for 12 hours, and naturally cool to room temperature...

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Abstract

The invention discloses a preparation method of a niobium pentoxide nanorod material with a regular hollow square box shape. The preparation method comprises the following steps: dissolving soluble niobium salt, a nonionic surfactant and a cationic surfactant into deionized water respectively, stirring uniformly and mixing, continuously stirring, performing hydrothermal reaction on the mixed solution, and performing centrifugal treatment on the solution reacted completely to obtain a solid substance; washing and drying the obtained solid substance, and performing calcination in the air to obtain the niobium pentoxide nanorod material with the regular hollow square box shape. By using the preparation method, the problem that the existing sodium ions are dispersed slowly in niobium pentoxide crystals is solved, dispersion of the sodium ions is improved by improving the dispersion distance of the ions, and the electrochemical performance of the material serving as a negative electrode material is improved; the niobium pentoxide nanorod material with the regular hollow square box shape is high in rate performance, excellent in cycling performance and stable in structure; the preparation method is simple in process, easy to operate and low in cost.

Description

technical field [0001] The invention relates to a battery negative electrode material and its preparation, in particular to a niobium pentoxide nanorod material with a regular hollow square box shape, its preparation method and application. Background technique [0002] With the advent of the era of electric vehicles, it poses a severe challenge to the global lithium source, and sodium is not only rich in content and low in cost, but also has a lower decomposition potential and higher density in sodium-ion batteries, which can store more The energy has the unique advantage of large-scale energy storage. Therefore, Na-ion batteries have attracted extensive attention. [0003] The principle of sodium-ion batteries is the same as that of lithium-ion batteries. Sodium ions are intercalated and extracted between the positive and negative electrodes to realize charging and discharging, so sodium-ion batteries have many similarities with lithium-ion batteries. However, since the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G33/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G33/00C01P2004/04C01P2004/16C01P2004/38C01P2004/64C01P2006/40
Inventor 陈晗石崇福向楷雄朱裔荣周伟陈宪宏
Owner HUNAN UNIV OF TECH
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