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Polyacrylonitrile/polyimide-based composite carbon airgel electrode material and preparation method

A polyimide-based and polyacrylonitrile technology, which is applied in the field of polyacrylonitrile nanofiber/polyimide-based composite carbon airgel electrode materials and its preparation, can solve the problems of inhibiting electrochemical activity, improving, and limiting ratio Surface area and other issues, to achieve the effect of improving mechanical compression performance, increasing specific surface area, and good compressive strength

Inactive Publication Date: 2019-05-03
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Electrospun polyacrylonitrile-based carbon nanofiber membrane is a class of carbon materials with excellent performance, which has been widely used in the field of energy storage, but its single-dimensional composition greatly limits its specific surface area, thereby inhibiting its electrochemical activity. promotion

Method used

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  • Polyacrylonitrile/polyimide-based composite carbon airgel electrode material and preparation method
  • Polyacrylonitrile/polyimide-based composite carbon airgel electrode material and preparation method
  • Polyacrylonitrile/polyimide-based composite carbon airgel electrode material and preparation method

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Effect test

Embodiment 1

[0046] Stir and dissolve 3 g of polyacrylonitrile (PAN) powder in 30 mL of DMF to obtain polyacrylonitrile spinning solution, which is spun into a nanofiber membrane by electrospinning technology. The specific parameters are: the diameter of the spinning container is the diameter of the pinhole A 5 mL plastic syringe of 0.5 mm was used, the voltage was 18 kV, the flow rate was 0.2 mm / min, the receiving distance was 15 cm, and the spinning time was 1 h. Then the polyacrylonitrile precursor was pre-oxidized to obtain the pre-oxidized polyacrylonitrile (o-PAN) nanofiber membrane. The specific parameters were: the heating rate was 2 °C / min, and the platform temperature was raised to 250 °C and kept for 2 h. 1 g of the above-mentioned o-PAN nanofibers was weighed and dispersed in 50 mL of deionized water after high-speed stirring at 18000 r / min for 30 min to obtain a suspension (1). At the same time, 2 g of water-soluble polyamic acid was dissolved in another 50 mL of deionized wat...

Embodiment 2

[0050] Stir and dissolve 3 g of polyacrylonitrile (PAN) powder in 30 mL of DMF to obtain polyacrylonitrile spinning solution, which is spun into a nanofiber membrane by electrospinning technology. The specific parameters are: the diameter of the spinning container is the diameter of the pinhole A 5 mL plastic syringe of 0.5 mm was used, the voltage was 18 kV, the flow rate was 0.2 mm / min, the receiving distance was 15 cm, and the spinning time was 1 h. Then the polyacrylonitrile precursor was pre-oxidized to obtain the pre-oxidized polyacrylonitrile (o-PAN) nanofiber membrane. The specific parameters were: the heating rate was 2 °C / min, and the platform temperature was raised to 250 °C and kept for 2 h. Weigh 2 g of the above-mentioned o-PAN nanofibers and disperse them in 50 mL of deionized water after high-speed stirring at 18000 r / min for 30 min to obtain a suspension (1). At the same time, 1 g of water-soluble polyamic acid was dissolved in another 50 mL of deionized water...

Embodiment 3

[0054] Stir and dissolve 3 g of polyacrylonitrile (PAN) powder in 30 mL of DMF to obtain polyacrylonitrile spinning solution, which is spun into a nanofiber membrane by electrospinning technology. The specific parameters are: the diameter of the spinning container is the diameter of the pinhole A 5 mL plastic syringe of 0.5 mm was used, the voltage was 18 kV, the flow rate was 0.2 mm / min, the receiving distance was 15 cm, and the spinning time was 1 h. Then the polyacrylonitrile precursor was pre-oxidized to obtain the pre-oxidized polyacrylonitrile (o-PAN) nanofiber membrane. The specific parameters were: the heating rate was 2 °C / min, and the platform temperature was raised to 250 °C and kept for 2 h. Weigh 3 g of the above-mentioned o-PAN nanofibers, stir them at 18000 r / min for 30 min, disperse them in 50 mL of deionized water, pour them into a mold with a fixed shape, and freeze-dry them for 48 h to obtain a single-component polypropylene Nitrile nanofiber airgel, denoted...

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Abstract

The invention belongs to the technical field of an energy storage material, and specifically relates to a polyacrylonitrile nanometer fiber / polyimide-based composite carbon aerogel electrode material and a preparation method thereof. The composite electrode material takes an electrostatic spinning polyacrylonitrile nanometer fiber and a polyamide acid macro molecule as precursors and is prepared by means of a self-assembly process, a freeze drying technology, an imidizing method, a carbonization method and the like. Since there are rich oxygen-containing functional groups on the surface of pre-oxidized polyacrylonitrile nanometer fiber, the oxygen-containing functional groups are easily combined with carboxyl on a polyamide acid molecular chain, and accordingly, a self-assembly process takes place. The prepared composite carbon aerogel electrode material is a three-dimensional composite material composed of a one-dimensional carbon nanometer fiber and two-dimensional sheet-shaped carbon, the specific surface area of the material itself is greatly improved, more active spots are provided for efficient adsorption of charge, and the application scope of the material is expanded. The composite electrode material can be widely applied to such energy storage fields as a supercapacitor, a lithium ion battery and the like.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and in particular relates to a polyacrylonitrile nanofiber / polyimide-based composite carbon airgel electrode material and a preparation method thereof. Background technique [0002] With the continuous depletion of petroleum and fossil energy and the increasing demand for clean energy, the development of new high-performance energy storage devices can not only reduce energy consumption during storage and transportation, but also meet people's energy demand in different places . Supercapacitors are a new class of energy storage devices that have been widely studied at present. They have outstanding advantages such as fast charge and discharge rates, high energy density, and long cycle life. They are feasible alternatives to lithium-ion batteries. According to different energy storage mechanisms, supercapacitor electrode materials can be mainly divided into two categories: pseudoc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/36H01G11/34H01G11/86
CPCY02E60/13
Inventor 刘天西赖飞立缪月娥左立增
Owner FUDAN UNIV
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