Preparation method of LaAlO3 nanofiber, product of preparation method and application of LaAlO3 nanofiber

A nanofiber and fiber technology, applied in the preparation of LaAlO3 nanofibers and its products and application fields, can solve the problems of unfriendly human body and environment, good chemical stability, long preparation time, etc., to improve electrochemical performance and cycle stability. Good performance, simple and convenient preparation method

Inactive Publication Date: 2021-03-16
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LaAlO 3 It is a typical perovskite structure material, which has many advantages such as small dielectric constant, good chemical stability, wide energy gap, large specific surface area, good thermal stability, etc., so it is widely used in electronic devices, catalysis, sewage treatment As a potential supercapacitor electrode material, there are few studies on its electrochemical performance
Moreover, the existing preparation process still has many disadvantages such as long preparation time, high synthesis temperature, large energy consumption, unfriendly to human body and environment, etc.

Method used

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  • Preparation method of LaAlO3 nanofiber, product of preparation method and application of LaAlO3 nanofiber
  • Preparation method of LaAlO3 nanofiber, product of preparation method and application of LaAlO3 nanofiber
  • Preparation method of LaAlO3 nanofiber, product of preparation method and application of LaAlO3 nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of LaAlO for supercapacitor 3 A method for preparing nanofibers, comprising the steps of:

[0030] a, 0.2916g of lanthanum nitrate and 0.2526g of aluminum nitrate were dissolved in 10g of DMF in turn, and then 1.65g of PVP was added thereto to obtain the required spinning solution for electrospinning;

[0031] b. Preparation of La(NO by electrospinning 3 ) 2 / Al(NO 3 ) 3 / PVP precursor fiber, the voltage is 18kV, the solution injection speed is 0.5ml / h, the spinning drum speed is 100r / min, the receiving distance is 20cm, and the electrospinning temperature is 25°C;

[0032] c, the resulting La(NO 3 ) 2 / Al(NO 3 ) 3 / After the PVP precursor fiber was dried at 80°C for 12h, in a box-type resistance furnace, the temperature was raised to 750°C at a heating rate of 5°C / min for sintering for 2h, and then cooled at a cooling rate of 1°C / min to obtain LaAlO 3 Nanofibers.

[0033] With the LaAlO that embodiment 1 makes 3 Nanofibers were tested by XRD, microsc...

Embodiment 2

[0035] A kind of LaAlO for supercapacitor 3 A method for preparing nanofibers, comprising the steps of:

[0036] a, 0.1458g of lanthanum nitrate and 0.1263g of aluminum nitrate were dissolved in 5g of DMF in turn, and then 0.825g of PVP was added thereto to obtain the required spinning solution for electrospinning;

[0037] b. Preparation of La(NO by electrospinning 3 ) 2 / Al(NO 3 ) 3 / PVP precursor fiber, the voltage is 10kV, the solution injection speed is 0.1ml / h, the spinning drum speed is 80r / min, the receiving distance is 5cm, and the electrospinning temperature is 0°C;

[0038] c, the resulting La(NO 3 ) 2 / Al(NO 3 ) 3 / After the PVP precursor fiber was dried at 50°C for 2h, in a box-type resistance furnace, the temperature was raised to 700°C at a heating rate of 0.5°C / min for sintering for 2h, and then cooled at a cooling rate of 0.5°C / min to obtain LaAlO 3 Nanofibers.

Embodiment 3

[0040] A kind of LaAlO for supercapacitor 3 A method for preparing nanofibers, comprising the steps of:

[0041] a, 0.4374g of lanthanum nitrate and 0.3789g of aluminum nitrate were dissolved in 15g of DMF in turn, and then 2.475g of PVP was added thereto to obtain the required spinning solution for electrospinning;

[0042] b. Preparation of La(NO by electrospinning 3 ) 2 / Al(NO 3 ) 3 / PVP precursor fiber, the voltage is 30kV, the solution injection speed is 0.6ml / h, the spinning speed is 300r / min, the receiving distance is 25cm, and the electrospinning temperature is 40°C;

[0043] c, the resulting La(NO 3 ) 2 / Al(NO 3 ) 3 / After the PVP precursor fiber was dried at 120°C for 24h, in a box-type resistance furnace, the temperature was raised to 850°C at a heating rate of 5°C / min for sintering for 4h, and then cooled at a cooling rate of 5°C / min to obtain LaAlO 3 Nanofibers.

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Abstract

The invention discloses a preparation method of a nanofiber. The preparation method comprises the following steps: a, dissolving 0.1458-0.4374 part of lanthanum nitrate and 0.1263-0.3789 part of aluminum nitrate in 5-15 parts of N,N-dimethylformamide, and adding 0.825-2.475 parts of polyvinylpyrrolidone to obtain an electrostatic spinning precursor solution; b, preparing a La(NO3)2/Al(NO3)3/PVP precursor fiber by an electrostatic spinning method; and c, drying and sintering at the temperature of 730-850 DEG C to obtain the LaAlO3 nanofiber. The invention further discloses the obtained LaAlO3 nanofiber and application of the LaAlO3 nanofiber in a supercapacitor electrode. The LaAlO3 nanofiber prepared by the method is uniform and continuous in thickness, the diameter is 50-80 nm, the fibersize is greatly reduced, the specific surface area is increased, and the electrochemical performance of the LaAlO3 fiber material is favorably improved.

Description

technical field [0001] The present invention relates to fiber preparation method and application, specifically a kind of LaAlO 3 Preparation methods of nanofibers and their products and applications. Background technique [0002] With the deterioration of the earth's environment and the increasing demand for energy, people's demand for high-performance chemical power sources is becoming more and more urgent. Supercapacitor is a high-performance electrochemical energy storage device between rechargeable batteries and traditional capacitors. It has many advantages such as large capacity, high energy density, and long service life. LaAlO 3 It is a typical perovskite structure material, which has many advantages such as small dielectric constant, good chemical stability, wide energy gap, large specific surface area, good thermal stability, etc., so it is widely used in electronic devices, catalysis, sewage treatment As a potential supercapacitor electrode material, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08C01F17/34C01F17/10B82Y40/00D01D5/00H01G11/26H01G11/46H01G11/86
CPCB82Y40/00C01P2004/16C01P2004/64C01P2006/40C01F17/10C01F17/34D01D5/003D01F9/08H01G11/26H01G11/46H01G11/86Y02E60/13
Inventor 韦俊霖董松涛汪蕾张亚梅
Owner JIANGSU UNIV OF SCI & TECH
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