Grapheme-polyaniline super capacitor electrode material and preparation method thereof

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,...

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