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Preparation method and application of ZnMn2O4 tube-in-tube nanofibers

A nanofiber and tube-in-tube technology, applied in nanotechnology, nanotechnology, fiber processing, etc., can solve problems such as poor uniformity of tube-in-tube fibers, high equipment requirements, and difficult adjustment of coaxial spinning parameters

Inactive Publication Date: 2021-09-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coaxial spinning has disadvantages such as difficult adjustment of parameters, high requirements on equipment, and poor uniformity of formed tube-in-tube fibers.

Method used

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  • Preparation method and application of ZnMn2O4 tube-in-tube nanofibers
  • Preparation method and application of ZnMn2O4 tube-in-tube nanofibers
  • Preparation method and application of ZnMn2O4 tube-in-tube nanofibers

Examples

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Effect test

no. 1 example

[0040] A ZnMn 2 o 4 A method for preparing tube-in-tube nanofibers, comprising the steps of:

[0041] (1) 1 mmol of zinc acetate dihydrate (Zn(CH 3 COO) 2 2H 2 O) and 2 mmol of manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O) added in the dehydrated alcohol of 5mL and the DMF of 5mL, treat Zn(CH 3 COO) 2 2H 2 O and Mn(CH 3 COO) 2 4H 2 After O was completely dissolved, 1.5 g of PVP K90 was added to the obtained metal salt solution, and after stirring at room temperature for 10 h, a light caramel-colored viscous solution was obtained, namely the spinning solution.

[0042] (2) Put the spinning solution prepared in step (1) into a 10mL syringe, set the distance between positive and negative electrodes to 15cm, set the upper limit of humidity to 50%, and set the injection speed to 0.06mm min -1 . Positive high voltage 12kV, negative high voltage 5kV. The spinning temperature was set to 40°C, and the fiber membrane was made by single nozzle electrospinning meth...

no. 2 example

[0046] A ZnMn 2 o 4 A method for preparing tube-in-tube nanofibers, comprising the steps of:

[0047] (1) 1 mmol of zinc acetate dihydrate (Zn(CH 3 COO) 2 2H 2 O) and 2 mmol of manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O) added in the dehydrated alcohol of 7mL and the DMF of 3mL, treat Zn(CH 3 COO) 2 2H 2 O and Mn(CH 3 COO) 2 4H 2 After O was completely dissolved, 1.2 g of PVP K90 was added to the obtained metal salt solution, and after stirring at room temperature for 10 h, a light caramel-colored viscous solution was obtained, namely the spinning solution.

[0048] (2) Put the spinning solution prepared in step (1) into a 10mL syringe, set the distance between positive and negative electrodes to 15cm, set the upper limit of humidity to 50%, and set the injection speed to 0.06mm min -1 . Positive high voltage 12kV, negative high voltage 5kV. The spinning temperature was set to 30°C, and the fiber membrane was made by single-nozzle electrospinning meth...

no. 3 example

[0058] A ZnMn 2 o 4 A method for preparing tube-in-tube nanofibers, comprising the steps of:

[0059] (1) 1 mmol of zinc acetate dihydrate (Zn(CH 3 COO) 2 2H 2 O) and 2 mmol of manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O) added to 10mL of dehydrated ethanol, treat Zn(CH 3 COO) 2 2H 2 O and Mn(CH 3 COO) 2 2H 2 After O was completely dissolved, 1.0 g of PVP K90 was added to the obtained metal salt solution, and after stirring at room temperature for 10 h, a light caramel-colored viscous solution was obtained, namely the spinning solution.

[0060] (2) Put the spinning solution prepared in step (1) into a 10mL syringe, set the distance between positive and negative electrodes to 15cm, set the upper limit of humidity to 50%, and set the injection speed to 0.1mm min -1 . Positive high voltage 10kV, negative high voltage 5kV. The spinning temperature was set at 25°C, and the fiber membrane was made by single-nozzle electrospinning.

[0061] (3) Dry the fibe...

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Abstract

The invention relates to the technical field of battery catalysts, in particular to a preparation method of ZnMn2O4 tube-in-tube nanofibers. The preparation method comprises the following steps that (1), zinc salt and manganese salt are dissolved in ethanol or a mixed solvent of DMF and ethanol, then PVP is added into the obtained metal salt solution, and a spinning solution is obtained after the PVP is completely dissolved; (2), the spinning solution is prepared into the fiber membrane by using a single-nozzle electrostatic spinning method; (3), the fiber membrane is dried, heated and pretreated to obtain the pretreated fiber membrane; and (4), annealing treatment is carried out on the pretreated fiber membrane to obtain the ZnMn2O4 tube-in-tube nanofibers. The ZnMn2O4 tube-in-tube nanofibers are prepared by regulating and controlling the volatilization rate of the solvent in the spinning solution and the subsequent heat treatment process, and has the advantages that the specific surface area is relatively large, and the tube-in-tube structure can effectively relieve the problem of volume expansion of the material in the charge-discharge cycle process, so that the lithium storage performance of the material is improved.

Description

technical field [0001] The invention relates to the technical field of battery anode materials, in particular to a ZnMn 2 o 4 Preparation methods and applications of tube-in-tube nanofibers. Background technique [0002] Information disclosed in this Background section is intended to enhance understanding of the general background of the invention and should not be taken as an acknowledgment or in any way to suggest that this information constitutes prior art that is already known to a person of ordinary skill in the art. [0003] With the continuous improvement of people's requirements for lithium-ion batteries, it is very important to develop an anode material with high specific capacity. Among the many anode materials that have been reported so far, transition metal oxides ZnMn 2 o 4 Because of its high lithium storage capacity, abundant reserves on the earth, environmental friendliness, and simple preparation process, it has attracted close attention from the majorit...

Claims

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Application Information

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IPC IPC(8): D01F9/08D04H1/728D04H1/4282D06C7/00D01D5/00H01M4/50H01M10/0525B82Y30/00
CPCD01F9/08D04H1/728D04H1/4282D06C7/00D01D5/003H01M4/50H01M10/0525B82Y30/00H01M2004/027H01M2004/022Y02E60/10
Inventor 原长洲徐森炀侯林瑞秦理
Owner UNIV OF JINAN
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