Hollow porous carbon nanofiber with tin oxide loaded on inner tube wall as well as preparation method and application of hollow porous carbon nanofiber

A technology of nanofibers and tin oxide, applied in the manufacture of hollow filaments, fiber chemical characteristics, negative electrodes, etc., can solve the problems of easy expansion of tin oxide, unstable interface, hindering practical application, etc. The effect of life and service efficiency, enhanced adsorption and storage capacity

Pending Publication Date: 2021-10-29
SHANGHAI UNIV OF ENG SCI
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the repeated deintercalation of ions and the easy volume expansion of tin oxide during cycling, resulting in agglomeration and pulverization, and its low energy density and interfacial instability during cycling hinder its practical application.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow porous carbon nanofiber with tin oxide loaded on inner tube wall as well as preparation method and application of hollow porous carbon nanofiber
  • Hollow porous carbon nanofiber with tin oxide loaded on inner tube wall as well as preparation method and application of hollow porous carbon nanofiber
  • Hollow porous carbon nanofiber with tin oxide loaded on inner tube wall as well as preparation method and application of hollow porous carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1As shown, the preparation method of the hollow porous carbon nanofibers with tin oxide on the inner wall of the present embodiment comprises the following steps:

[0042] (1) Mix 1.4g polyacrylonitrile (PAN), 0.5g polymethylmethacrylate (PMMA) and 0.2g polyvinylpyrrolidone (PVP) and add them to 17.6g of N,N-dimethylformamide , stirred for 6h and ultrasonically treated for 4h to prepare the shell spinning solution.

[0043] (2), 2.2g polyvinylpyrrolidone and 0.2g stannous chloride dihydrate (SnCl 2 2H 2 O) After mixing, add 1 g of ethanol and 17.6 g of N,N-dimethylformamide into a mixed solvent, stir for 6 h and ultrasonically treat for 4 h to prepare a core layer spinning solution.

[0044] (3) The prepared shell spinning solution and the core spinning solution were respectively injected into a 5mL syringe with a coaxial needle of 16G / 21G, and coaxial electrospinning was carried out at a spinning voltage of 20kV to obtain carbon fibers Precursor; whe...

Embodiment 2

[0048] The amount of stannous chloride dihydrate in Example 1 was changed to 0.1 g, and the rest were the same as in Example 1, and the finally obtained material was denoted as HPCNF-2. The content of tin oxide in the pores of this component material is less and unevenly distributed, so the effect of tin oxide is less obvious, and the specific surface area is 25cm 2 / g, the specific capacitance is 1237.5F / g at a current density of 1A / g. This electrode material is assembled into a supercapacitor, such as image 3 As shown, after 10,000 charge-discharge cycles, the stability is better, reaching 90.6%.

Embodiment 3

[0050] The amount of stannous chloride dihydrate in Example 1 was changed to 0.3g, all the others were the same as in Example 1, and the finally obtained material was denoted as HPCNF-3. There are more tin oxide distributed in the fiber hollow channel of this component material, but less effectively adheres to the tube wall, causing certain blockage to the hollow channel, and the specific surface area is 19.6cm 2 / g, the specific capacitance is 1024.2F / g at a current density of 1A / g. This electrode material is assembled into a supercapacitor, such as Figure 4 As shown, after 10,000 charge-discharge cycles, the stability is good at 88.2%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention provides hollow porous carbon nanofiber with tin oxide loaded on an inner tube wall as well as a preparation method and application of the hollow porous carbon nanofiber. The preparation method comprises the following steps of mixing polyacrylonitrile, polymethyl methacrylate and polyvinylpyrrolidone to obtain a shell layer spinning solution; dissolving polyvinylpyrrolidone and stannous chloride dehydrate to obtain a core layer spinning solution; performing coaxial electrostatic spinning on the shell layer spinning solution and the core layer spinning solution to obtain a carbon fiber precursor; and carrying out pre-oxidation and carbonization treatment to obtain the hollow porous carbon nanofiber with tin oxide loaded on the inner tube wall. Compared with porous carbon nanofiber prepared by a traditional method, the hollow porous carbon nanofiber has the advantages that the tin oxide and carbon fiber are combined to form a network skeleton, so that the carbon fiber has more active sites and higher specific capacitance, and meanwhile, controllable ion and electron transmission channels of the carbon fiber improve the charge storage stability and efficiency of the tin oxide; and the prepared hollow porous carbon nanofiber can be applied to the aspects of lithium batteries, supercapacitors and the like.

Description

technical field [0001] The invention belongs to the technical field of novel porous carbon nanofibers, and in particular relates to a hollow porous carbon nanofiber whose inner tube wall supports tin oxide and its preparation method and application. Background technique [0002] Carbon-based flexible porous carbon nanofiber materials are an important class of fiber materials, especially in the field of new energy. Electrospinning to prepare polyacrylonitrile-based carbon nanofibers is a convenient method for preparing carbon-based flexible porous carbon nanofiber materials, which has the advantages of simple operation, low cost, and easy adjustment of product structure. The polyacrylonitrile-based carbon nanofibers prepared by this method have the advantages of three-dimensional structure, high porosity, high specific surface area, high conductivity and high storage performance, and are widely used in catalyst carrier materials, supercapacitor electrode materials and in Lit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/21D01F9/22D01F1/10D01F1/08H01G11/24H01G11/36H01G11/46H01M4/48H01M4/62H01M10/0525
CPCD01F9/21D01F9/22D01F1/10D01F1/08H01M4/483H01M4/628H01M10/0525H01M4/625H01G11/36H01G11/24H01G11/46H01M2004/027H01M2004/021Y02E60/10Y02E60/13
Inventor 孔方圆辛斌杰刘毅余淼沈冬冬于文杰罗健袁秀文
Owner SHANGHAI UNIV OF ENG SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap