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Preparation method for flexible self-supporting porous carbon nanofiber electrode and application thereof

A nanofiber, self-supporting technology, applied in nanotechnology, battery electrodes, nanotechnology, etc., can solve the problems of high production cost and complex production process, and achieve the effect of improving electrical conductivity, good mechanical properties, and increasing specific surface area

Active Publication Date: 2018-01-19
湖州超钠新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of complex production process and high production cost of existing sodium-ion battery electrodes, the present invention intends to provide a method for preparing a flexible self-supporting porous carbon nanofiber electrode with adjustable doping types

Method used

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  • Preparation method for flexible self-supporting porous carbon nanofiber electrode and application thereof
  • Preparation method for flexible self-supporting porous carbon nanofiber electrode and application thereof
  • Preparation method for flexible self-supporting porous carbon nanofiber electrode and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] In this example, coaxial electrospinning is used to prepare nitrogen-doped flexible self-supporting porous carbon nanofiber electrode material, and it is used as a negative electrode material for sodium-ion batteries. The specific steps are:

[0023] Dissolve 1g of polyacrylonitrile and 1g of polyvinylpyrrolidone in 10 ml of organic solvent 1,2-dimethylformamide, respectively, and magnetically stir at 30 °C for 12 h to obtain an electrospinning precursor; A special coaxial needle, with polyvinylpyrrolidone solution as the core and polyacrylonitrile solution as the shell, at a temperature of 50 °C and a humidity of 10%, the two precursors flowed to the spinning needle at a constant speed of 10 μl / min. Adjust the distance from the needle to the receiver to 20 cm, form nanofibers under the action of an electrostatic field of 15kV, and use the receiver to receive the fibers to form spun fiber cloth; arrange the spun fibers in a muffle furnace for pre-oxidation, and the heati...

Embodiment 2

[0027] The process and method of this embodiment are the same as those in Embodiment 1. The difference is that the added polymer containing doping elements is changed from polyacrylonitrile to polythiophene.

Embodiment 3

[0029] The process and method of this embodiment are the same as those in Embodiment 1. The difference is that the added decomposing pore-forming polymer is changed from polyvinylpyrrolidone to polymethylmethacrylate.

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Abstract

The invention discloses a preparation method for a flexible self-supporting porous carbon nanofiber electrode and an application of the flexible self-supporting porous carbon nanofiber electrode in asodium ion battery. The nanofiber electrode is prepared by dissolving different high polymers into organic solution as core / shell layer spinning solution and carrying out a coaxial electrostatic spinning method. The preparation method has the advantages that the raw material cost is low, the technology is simple, and the sulfur-doped, nitrogen-doped or nitrogen and sulfur co-doped flexible self-supporting electrode can be prepared efficiently. The flexible self-supporting pure carbon nanofiber electrode prepared by the method is taken as a sodium ion battery anode material, and the sodium ionbattery has the advantages of high specific capacity and high cycling stability. The electrode has high flexibility, so the possibility of applying the electrode to a flexible device is provided. Thepreparation cost is low, so the electrode is applicable to large-scale development and application of the sodium ion battery.

Description

technical field [0001] The invention relates to a preparation method of a self-supporting porous carbon nanofiber electrode and its application in a sodium ion battery, belonging to the field of secondary batteries. Background technique [0002] In recent years, due to its advantages of light weight, high voltage, high capacity, high power, stable discharge, and environmental friendliness, lithium-ion batteries have shown broad potential in portable electronic devices, electric vehicles, space technology, and defense industries. Application prospects and potential huge economic benefits. However, limited lithium resources and rising lithium raw material prices limit the large-scale development of lithium-ion batteries. [0003] On the other hand, the reserves of sodium element are extremely abundant, ranking fourth among the metal elements in the earth's crust, accounting for 2.64% of the total reserves, and the price is low. It is in the same main group as lithium, with si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/60H01M10/054B82Y30/00
CPCY02E60/10
Inventor 姜银珠朱杭
Owner 湖州超钠新能源科技有限公司
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