Grapheme-polyaniline super capacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors. The effect of pseudocapacitance

Inactive Publication Date: 2013-06-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly obtains graphite oxide single-layer/polyaniline single-layer conductive film through electrostatic attraction and oxidative doping, and the substrate is directly used as a current collector, which simplifies the operation, but becau

Method used

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  • Grapheme-polyaniline super capacitor electrode material and preparation method thereof
  • Grapheme-polyaniline super capacitor electrode material and preparation method thereof
  • Grapheme-polyaniline super capacitor electrode material and preparation method thereof

Examples

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Example Embodiment

[0032] Example 1

[0033] Cut the graphite paper sheet into a 1×3cm rectangle with scissors, and the edges of the cut graphite paper sheet should be neat. Use a red carbon pen to draw a line 1cm away from one end of the graphite paper on one side of the graphite paper to make it a 1×1cm square as the electrolysis site. Add 20mL of electrolyte solution into a round dry and clean glass dish with a specification of 50×30mm. The electrolyte solution is sulfuric acid with a pH value of 1.3. The electrolysis device is a DC power supply. Take two cut graphite paper sheets and connect them to the power supply For the positive and negative electrodes, the ends (1×1cm) of the two pieces of graphite paper closest to the straight line are completely submerged below the liquid level of the electrolyte, the straight line is level with the liquid level, and the two electrodes are facing each other in parallel with a distance of 1 cm. When starting electrolysis, slowly adjust the voltage to ...

Example Embodiment

[0038] Example 2

[0039] Cut the graphite paper sheet into a 1×3cm rectangle with scissors, and the edges of the cut graphite paper sheet should be neat. Use a red carbon pen to draw a line 1cm away from one end of the graphite paper on one side of the graphite paper to make it a 1×1cm square as the electrolysis site. Add 20mL of electrolyte solution into a round dry and clean glass dish with a specification of 50×30mm. The electrolyte solution is sulfuric acid with a pH value of 2.3. For the positive and negative electrodes, the ends (1×1cm) of the two pieces of graphite paper closest to the straight line are completely submerged below the liquid level of the electrolyte, the straight line is level with the liquid level, and the two electrodes are facing each other in parallel with a distance of 1 cm. When starting electrolysis, slowly adjust the voltage to 8.0V (the field strength is 800V / m), and the electrolysis time is 10min, then take out the graphite paper sheet of the...

Example Embodiment

[0043] Example 3

[0044] Cut the graphite paper sheet into a 2×4cm rectangle with scissors, and the edges of the cut graphite paper sheet should be neat. Use a red carbon pen to draw a straight line 2cm away from one end of the graphite paper on one side of the graphite paper to make it a 2×2cm square as the electrolysis site. Add 30mL of electrolyte solution into a round dry and clean glass dish with a specification of 50×30mm. The electrolyte solution is hydrochloric acid with a pH value of 1.0. The electrolysis device is a DC power supply. Take two cut graphite paper sheets and connect them to the power supply For the positive and negative electrodes, the ends (2×2cm) of the two pieces of graphite paper closest to the straight line are completely submerged below the liquid level of the electrolyte, the straight line is level with the liquid level, and the two electrodes are facing each other in parallel with a distance of 5 cm. When starting electrolysis, slowly adjust th...

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Abstract

The invention provides a grapheme-polyaniline super capacitor electrode material which refers to a composite electrode material composed of the polyaniline which deposits on the surface of the grapheme in a constant potentials mode. The shape of the polyaniline is self-supporting and is gained by electrolyzing graphite paper. The polyaniline is on the basement of the graphite paper. The preparation comprise a step of connecting the graphite paper with a positive and negative electrode, immersing the graphite paper in the electrolyte with the process of electrolyzation in 5-50 minutes; a step of taking out the graphite paper of the positive electrode which is washed with distilled water and is dried in a vacuum drying oven; a step of regarding a saturated Ag/AgC1 electrode as a reference electrode and a platinum sheet as a auxiliary electrode. The electrolytic graphite paper which is dealt with positive electrode is regarded as a working electrode. The polyaniline is deposited in the mixed solution of aniline and H2SO4, the deposition voltage is 0.5-1.2 V and the polyaniline is deposited for 1-40minutes. The graphite paper is washed by the distilled water and then is dried by putting into the vacuum drying oven after the graphite paper is taken out. The method has the advantages of being simple in preparation technology, low in cost and avoiding effectively the grapheme from overlapping so as to gain a well conductive electrode material.

Description

technical field [0001] The invention belongs to the technical field of inorganic-organic composite materials, and in particular relates to an electrode material and a preparation method thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are an energy storage device between ordinary batteries and traditional capacitors, and have developed rapidly in recent years. Due to its advantages such as large specific power, long cycle life, low price and environmental friendliness, the research on electrode materials for supercapacitors has become a hot spot in current research. [0003] Using graphite paper as a raw material to prepare supercapacitor electrode materials has the advantages of convenient material acquisition, low cost, and remarkable effect, and has attracted more and more attention from researchers. The preparation process of graphite paper is first to treat graphite powder with Hummers method to obtain expanded graphite,...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/48H01G11/86
CPCY02E60/13
Inventor 臧建兵王艳辉辛国祥
Owner YANSHAN UNIV
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