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Preparation of SnO2-NiO nanotube with hollow structure and application of SnO2-NiO nanotube in supercapacitor

A technology of sno2-nio and nanotubes, applied in the field of nanomaterials, can solve problems such as environmental pollution and operational safety impact, cumbersome operation and preparation, unfavorable large-scale actual production, etc., achieve excellent electrochemical activity, alleviate volume change, and multi-charge Storage of active site effects

Pending Publication Date: 2022-05-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantage is that in the process of precursor preparation, liquid fuel and acetic acid are used as mixed solvents, and the precursor solution is atomized at the same time, and xylene is burned to form a high-temperature flame ignition spray, which has a negative impact on environmental pollution and operational safety during treatment and use. to have a certain impact
[0005] Patent CN 107008336 A utilizes redox mechanism to prepare a kind of SnO 2 @Fe 2 o 3 Composite material, nano SnO 2 Dispersed in liquid medium to obtain SnO 2 dispersion; in the presence of a reducing agent, the nano-SnO 2 The Sn(IV) on the surface is reduced to the low oxidation state of tin to obtain SnO 2 Reducing solution; the above SnO 2 Reducing solution and Fe 2 o 3 The solution is mixed evenly, fully reacted, and the product is separated to obtain SnO 2 @Fe 2 o 3 Nanocomposite materials, this method is low in cost, environmentally friendly, good in repeatability, and high in efficiency, but its disadvantage is that the operation and preparation are cumbersome, which is not conducive to large-scale actual production

Method used

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  • Preparation of SnO2-NiO nanotube with hollow structure and application of SnO2-NiO nanotube in supercapacitor
  • Preparation of SnO2-NiO nanotube with hollow structure and application of SnO2-NiO nanotube in supercapacitor
  • Preparation of SnO2-NiO nanotube with hollow structure and application of SnO2-NiO nanotube in supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A hollow structure of SnO 2 -The preparation method of NiO nanotube, its specific preparation steps are as follows:

[0036] 1), weigh 1.0g PVP, 6ml DMF and 6ml C 2 h 5 OH solution mixed, add 1.0mmol of SnCl 4 With 1.0mmol Ni(NO 3 ) 2 ·6H 2 O solid metal salt; after mechanical stirring at room temperature for 12h to mix evenly, light green Sn 4+ / Ni 2+ / PVP sol;

[0037] 2), the light green Sn prepared in step 1) 4+ / Ni 2+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , voltage 22KV, the solid carbon fiber film material obtained, first undergoes pre-oxidation treatment in the air at 200°C for 3h, and then heats up to 500°C at a heating rate of 5°C / min in the air atmosphere for heat treatment, and at this temperature Keep for 3h, then cool to room temperature to get the final product.

[0038] Adopt TEM, SEM and XRD etc. to the SnO of the hollow structure that above emb...

Embodiment 2

[0040] A hollow structure of SnO 2 -The preparation method of NiO nanotube, its specific preparation steps are as follows:

[0041] 1), weigh 1.0g PVP, 6ml DMF and 6ml C 2 h 5 OH solution mixed, add 1.0mmol of SnCl 4 with 0.5mmol Ni(NO 3 ) 2 ·6H 2 O solid metal salt; after mechanical stirring at room temperature for 12h to mix evenly, light green Sn 4+ / Ni 2+ / PVP sol;

[0042] 2), the light green Sn prepared in step 1) 4+ / Ni 2+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , voltage 22KV, the solid carbon fiber film material obtained, first undergoes pre-oxidation treatment in the air at 200 °C for 3 hours, and then heats up to 500 °C at a heating rate of 5 °C / min in the air atmosphere for heat treatment, and at this temperature Keep for 3h, then cool to room temperature to get the final product.

Embodiment 3

[0044] A hollow structure of SnO 2 -The preparation method of NiO nanotube, its specific preparation steps are as follows:

[0045] 1), weigh 1.0g PVP, 6ml DMF and 6ml C 2 h 5 OH solution mixed, add 0.5mmol of SnCl 4 With 1.0mmol Ni(NO 3 ) 2 ·6H 2 O solid metal salt; after mechanical stirring at room temperature for 12h to mix evenly, light green Sn 4+ / Ni 2+ / PVP sol;

[0046] 2), the light green Sn prepared in step 1) 4+ / Ni 2+ / PVP sol, processed by electrospinning technology, the spinning temperature is controlled at 25°C, and the injection speed is 1.0mL·h -1 , voltage 22KV, the solid carbon fiber film material obtained, first undergoes pre-oxidation treatment in the air at 200 °C for 3 hours, and then heats up to 500 °C at a heating rate of 5 °C / min in the air atmosphere for heat treatment, and at this temperature Keep for 3h, then cool to room temperature to get the final product.

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Abstract

The invention discloses a preparation method of a SnO2-NiO nanotube with a hollow structure and an application of the SnO2-NiO nanotube in a supercapacitor. Belongs to the technical field of nanomaterials. The preparation method comprises the following steps: 1, preparing Sn < 4 + > / Ni < 2 + > / PVP mixed sol by utilizing an electrostatic adsorption method between an oxygen-containing functional group on the surface of PVP and transition metal; 2, carrying out an electrostatic spinning technology on the Sn < 4 + > / Ni < 2 + > / PVP mixed sol to obtain a solid carbon fiber film; 3, the solid carbon fiber thin film is subjected to pre-oxidation and then oxidation treatment, and the SnO2-NiO nanotube of the hollow structure is obtained. According to the invention, the problems of tedious process, safety, environmental protection and the like caused by conventional synthesis methods for preparing the hollow nanostructure, such as a soft and hard template method, an ion exchange method, a hydrothermal reaction and the like, are avoided. Meanwhile, PVP, Sn < 2 + > and Ni < 2 + > selected in the invention have the advantages of adjustable composition, high electrochemical activity and stability, convenience in batch production and the like, and the material shows higher specific capacity and stability in a supercapacitor test as a pseudocapacitor material, and has the power characteristic and cycling stability of instantaneous large-current discharge in actual production and application.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and relates to a hollow structure SnO 2 - Preparation method of NiO nanotubes; in particular, relates to a hollow-structured SnO with high electrochemical specific capacity and stability 2 - Preparation method of NiO heterojunction nanotube supercapacitor electrode material and its application in supercapacitor. Background technique [0002] Energy and the environment are global problems, and the development of new, green and sustainable energy has become the most urgent research hotspot. As an important class of electrochemical energy storage devices, supercapacitors have a power ten times higher than that of batteries due to their advantages such as high current fast charge and discharge capabilities, high energy utilization efficiency, long cycle life, and low maintenance costs. The density and the charge storage capacity of tens or even hundreds of times of traditional capacitors can m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G53/04H01G11/24H01G11/46
CPCC01G19/02C01G53/04H01G11/24H01G11/46C01P2002/72C01P2004/03C01P2004/04C01P2006/40C01P2004/82C01P2004/64C01P2004/62C01P2004/13
Inventor 张一卫李同飞徐林孙冬梅唐亚文
Owner SOUTHEAST UNIV
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