A kind of preparation method and application of hollow graphene fiber electrode

A graphene fiber and graphene technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of long preparation time and complicated steps, and achieve the effect of fast and controllable preparation

Active Publication Date: 2019-03-08
宁国市龙晟柔性储能材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the above two methods, graphene oxide is hydrothermally or chemically reduced to obtain graphene, and the required steps are more complicated and the preparation time is longer.

Method used

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  • A kind of preparation method and application of hollow graphene fiber electrode
  • A kind of preparation method and application of hollow graphene fiber electrode
  • A kind of preparation method and application of hollow graphene fiber electrode

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Experimental program
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Effect test

Embodiment 1

[0024] Preparation of hollow graphene fiber electrodes:

[0025] First, 100 mL of a 3 mg / mL graphene oxide aqueous solution was prepared by a chemical oxidation exfoliation method. Weigh 1.06g of lithium perchlorate, add it into 100mL of graphene oxide aqueous solution and stir to dissolve for 1h to obtain a precursor mixed solution. A copper wire with a diameter of 100 μm was used as the working electrode, a saturated potassium chloride electrode was used as the reference electrode, and a platinum wire electrode was used as the counter electrode to construct an electrochemical deposition reduction system. Put the above electrochemical reduction system into the graphene oxide mixed solution, and apply a constant voltage of -1.2V between the working electrode and the reference electrode. The deposition reduction time is 180s. Under the action of the electric field, the graphene oxide sheet will Adsorbed on the surface of copper wire electrode and electrochemically reduced to g...

Embodiment 2

[0029] Preparation of hollow graphene fiber electrodes:

[0030] First, 100 mL of a 5 mg / mL graphene oxide aqueous solution was prepared by a chemical oxidation exfoliation method. Weigh 2.12g of lithium perchlorate, add it into 100mL graphene oxide aqueous solution and stir and dissolve for 1h to obtain a precursor mixed solution. An iron wire with a diameter of 500 μm was used as the working electrode, a saturated potassium chloride electrode was used as the reference electrode, and a platinum wire electrode was used as the counter electrode to construct an electrochemical deposition reduction system. Put the above electrochemical reduction system into the graphene oxide mixed solution, and apply a constant voltage of -1.2V between the working electrode and the reference electrode, and the deposition reduction time is 60s. Under the action of the electric field, the graphene oxide sheet will Adsorbed on the surface of copper wire electrode and electrochemically reduced to g...

Embodiment 3

[0034] Preparation of hollow graphene fiber electrodes:

[0035] First, 100 mL of a 1 mg / mL graphene oxide aqueous solution was prepared by a chemical oxidation exfoliation method. Weigh 0.53 g of lithium perchlorate, add it into 100 mL of graphene oxide aqueous solution and stir to dissolve for 1 h to obtain a precursor mixed solution. An aluminum wire with a diameter of 50 μm was used as a working electrode, a saturated potassium chloride electrode was used as a reference electrode, and a platinum wire electrode was used as a counter electrode to construct an electrochemical deposition reduction system. Put the above electrochemical reduction system into the graphene oxide mixed solution, and apply a constant voltage of -1.2V between the working electrode and the reference electrode. The deposition and reduction time is 300s. Under the action of the electric field, the graphene oxide sheet will Adsorbed on the surface of copper wire electrode and electrochemically reduced t...

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Abstract

The invention discloses a preparation method for a hollow graphene fiber electrode and an application of hollow graphene fiber, and relates to the technical fields of flexible energy storage and a wearable device. A precursor mixed solution is prepared firstly and an electrochemical deposition restoring system is established; then a metal wire electrode deposited with graphene is restored by electrochemical deposition; and finally, the electrode is dissolved by an acid solution to prepare the hollow graphene fibre. The conductivity of the prepared fiber electrode can reach 10S / cm; the capacity of a prepared fiber-shaped supercapacitor is about 100F / g; and the capacity still can be maintained at 90% after one hundred million times of charging-discharging test.

Description

Technical field: [0001] The invention relates to the technical field of flexible energy storage and wearable devices, in particular to a preparation method and application of a hollow graphene fiber electrode. Background technique: [0002] Novel fiber-shaped electronic devices, including fiber-shaped solar cells and fiber-shaped energy storage devices, as an important part of flexible electronics, have a significant impact on the development of wearable devices. Compared with traditional planar or bulk electronic devices, fiber-shaped electronic devices can achieve large deformations such as bending, stretching, and even three-dimensional distortion, and are easy to integrate. They can be formed with good flexibility and high permeability through mature textile technology. The energy storage fabric can effectively meet the development needs of wearable devices. [0003] Although fiber-shaped energy storage devices have received extensive attention from academia and industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/40H01G11/86
CPCY02E60/13
Inventor 王兵杰武青青吴景霞苑玥
Owner 宁国市龙晟柔性储能材料科技有限公司
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