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Preparation method of magnesium ferrite nanofiber negative electrode material

A nanofiber and anode material technology, applied in the fields of nanomaterials and chemical power sources, can solve the problems of poor cycle stability and no substantial application value, and achieve high discharge platform, stable cycle performance, and environmental friendliness.

Inactive Publication Date: 2016-11-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results of electrochemical tests show that the cycle stability of materials prepared by this method is poor, and they have no substantial application value.

Method used

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  • Preparation method of magnesium ferrite nanofiber negative electrode material
  • Preparation method of magnesium ferrite nanofiber negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 3.0g of PVP and dissolve it in 8.5g DMF and 8.5g ethanol mixed solvent, prepare a solution with a mass fraction of 15%, put it into a magnetic rotor, and stir at room temperature for 8 to 24 hours. After the solution is evenly stirred, add 0.1256 C of g 4 h 6 MgO 4 4H 2 O and 0.4744g of Fe(NO 3 ) 3 9H 2 O(C 4 h 6 MgO 4 4H 2 O and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2), and continue to stir at room temperature for 5-10 hours until a brown homogeneous solution is obtained. Then, the uniform spinning solution configured was spun in a self-made electrospinning device, the spinning voltage was 18kV, the receiving distance was 16cm, and the spinning speed was 0.5mL / h to obtain PVP / C 4 h 6 MgO 4 / Fe(NO 3 ) 3 Composite nanofiber membrane. Then put the obtained composite nanofibrous membrane into a tube furnace for calcination, raise the temperature from room temperature to 800°C in an air atmosphere, keep the temperature for 3h, the heating rate i...

Embodiment 2

[0020] Weigh 3.0g of PVP and dissolve in 8.5g DMF and 8.5g ethanol mixed solvent, prepare a solution with a mass fraction of 15%, put it into a magnetic rotor, and stir at room temperature for 8 to 24 hours. After the solution is evenly stirred, add 0.1884 C of g 4 h 6 MgO 4 4H 2 O and 0.7116g of Fe(NO 3 ) 3 9H 2 O(C 4 h 6 MgO 4 4H 2 O and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2), and continue to stir at room temperature for 5-10 hours until a brown homogeneous solution is obtained. Then, the uniform spinning solution configured was spun in a self-made electrospinning device, the spinning voltage was 20kV, the receiving distance was 18cm, and the spinning speed was 0.5mL / h to obtain PVP / C 4 h 6 MgO 4 / Fe(NO 3 ) 3 Composite nanofiber membrane. Then put the obtained composite nanofiber membrane into a tube furnace for calcination, raise the temperature from room temperature to 800°C in an air atmosphere, keep the temperature for 3h, and the heating rate is...

Embodiment 3

[0022] Weigh 2.4g of PVP and dissolve it in 8.8g DMF and 8.8g ethanol mixed solvent, prepare a solution with a mass fraction of 12%, put it into a magnetic rotor, and stir at room temperature for 8 to 24 hours. After the solution is evenly stirred, add 0.1884 C of g 4 h 6 MgO 4 4H 2 O and 0.7116g of Fe(NO 3 ) 3 9H 2 O(C 4 h 6 MgO 4 4H 2 O and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2), and continue to stir at room temperature for 5-10 hours until a brown homogeneous solution is obtained. Then, the uniform spinning solution configured was spun in a self-made electrospinning device, the spinning voltage was 18kV, the receiving distance was 20cm, and the spinning speed was 0.5mL / h to obtain PVP / C 4 h 6 MgO 4 / Fe(NO 3 ) 3Composite nanofiber membrane. Then put the obtained composite nanofibrous membrane into a tube furnace for calcination, raise the temperature from room temperature to 600°C in an air atmosphere, keep the temperature for 3h, the heating rate is...

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Abstract

The invention discloses a preparation method of a magnesium ferrite nanofiber negative electrode material, and belongs to the technical field of nanometer materials and chemical power supplies. The MgFe2O4 nanofiber negative electrode material is prepared through an electrostatic spinning and calcination technology, and the method is simple in preparation process, low in cost, friendly to the environment and beneficial to further production expansion. The lithium ion battery negative electrode material, namely MgFe2O4 nanofiber, has a high discharge platform, large initial discharge capacity and stable circulating performance, and has wide development prospects as a new generation of lithium ion battery negative electrode material.

Description

technical field [0001] The invention relates to a preparation method of magnesium ferrite nanofibers, a negative electrode material for lithium ion batteries, and belongs to the technical field of nanomaterials and chemical power sources. Background technique [0002] Lithium-ion battery is another rechargeable battery after lead-acid battery, nickel-cadmium battery and nickel-metal hydride battery. It has a series of advantages such as high specific capacity, high open circuit voltage, long cycle life, no memory effect and no environmental pollution. , as a new type of green and environmentally friendly energy, it has gradually become the first choice for portable electronic device batteries, and has been widely used in the field of power energy. The negative electrode material is one of the key materials that affect the performance of lithium-ion batteries. Although traditional graphite and other carbon materials have been commercialized as anode materials for lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M4/52C01G49/00B82Y30/00
CPCB82Y30/00C01G49/00H01M4/523H01M10/0525Y02E60/10
Inventor 乔辉罗磊陈克费雅倩魏取福
Owner JIANGNAN UNIV
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