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Nitrogen-doped reduced graphene oxide modified graphite felt electrode and preparation method thereof

A technology of graphite felt and graphene, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of affecting the electrical properties of the electrodes and reducing the conductivity of the electrodes, and achieve the effect of increasing the specific surface area and reducing the efficiency of the process

Active Publication Date: 2018-09-28
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the addition of oxygen-containing derivatives of graphene will lead to a decrease in the conductivity of the electrode, thereby affecting the final electrical properties of the electrode.

Method used

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  • Nitrogen-doped reduced graphene oxide modified graphite felt electrode and preparation method thereof
  • Nitrogen-doped reduced graphene oxide modified graphite felt electrode and preparation method thereof
  • Nitrogen-doped reduced graphene oxide modified graphite felt electrode and preparation method thereof

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Effect test

Embodiment 1

[0046] A preparation method of a nitrogen-doped reduced graphene oxide modified graphite felt electrode, the steps of which are as follows:

[0047] S1, carry out hydrophilic treatment to graphite felt electrode;

[0048] S2, configure the mixed solution of nitrogen-containing compound and graphene oxide, disperse the mixed solution of nitrogen-containing compound and graphene oxide into the graphite felt electrode through hydrophilic treatment, and freeze-dry to obtain graphene oxide and nitrogen-containing Compound-doped graphite felt composite electrode preform;

[0049] S3, the graphene oxide prepared in step S2 and the graphite felt composite electrode prefabricated body doped with nitrogen-containing compounds are placed in a tube furnace, and the N 2 Under the protection of atmosphere, the graphene oxide and nitrogen-containing compound doped graphite felt composite electrode preform is heat-treated, so that the nitrogen-containing compound in the graphite felt composi...

Embodiment 2

[0061] A preparation method of a nitrogen-doped reduced graphene oxide modified graphite felt electrode, the steps of which are as follows:

[0062] S1, carry out hydrophilic treatment to graphite felt electrode;

[0063] S2, configure the mixed solution of nitrogen-containing compound and graphene oxide, disperse the mixed solution of nitrogen-containing compound and graphene oxide into the graphite felt electrode through hydrophilic treatment, and freeze-dry to obtain graphene oxide and nitrogen-containing Compound-doped graphite felt composite electrode preform;

[0064] S3, the graphene oxide prepared in step S2 and the graphite felt composite electrode prefabricated body doped with nitrogen-containing compounds are placed in a tube furnace, and the N 2 Under the protection of atmosphere, the graphene oxide and nitrogen-containing compound doped graphite felt composite electrode preform is heat-treated, so that the nitrogen-containing compound in the graphite felt composi...

Embodiment 3

[0071] A preparation method of a nitrogen-doped reduced graphene oxide modified graphite felt electrode, the steps of which are as follows:

[0072] S1, carry out hydrophilic treatment to graphite felt electrode;

[0073] S2, configure the mixed solution of nitrogen-containing compound and graphene oxide, disperse the mixed solution of nitrogen-containing compound and graphene oxide into the graphite felt electrode through hydrophilic treatment, and freeze-dry to obtain graphene oxide and nitrogen-containing Compound-doped graphite felt composite electrode preform;

[0074] S3, the graphene oxide prepared in step S2 and the graphite felt composite electrode prefabricated body doped with nitrogen-containing compounds are placed in a tube furnace, and the N 2 Under the protection of atmosphere, the graphene oxide and nitrogen-containing compound doped graphite felt composite electrode preform is heat-treated, so that the nitrogen-containing compound in the graphite felt composi...

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Abstract

The invention discloses a nitrogen-doped reduced graphene oxide modified graphite felt electrode and a preparation method thereof. The preparation method comprises the steps of: firstly dispersing a mixed solution of a nitrogen-containing compound and graphene oxide into a hydrophilically treated graphite felt electrode, freeze-drying to obtain a graphite felt composite electrode preform, and thenplacing the graphite felt composite electrode preform in the tube furnace for heat treatment, so as to obtain the graphite felt electrode. Another preparation method comprises the steps of: firstly dispersing a mixed solution of graphene oxide into a hydrophilically treated graphite felt electrode, freeze-drying to obtain a graphite felt composite electrode preform, and then separately performingheat treatment with independent control of the temperature on the graphite felt composite electrode perform and nitrogen-containing compound under N2 atmosphere protection, so as to obtain the graphite felt electrode. The nitrogen-doped reduced graphene oxide-modified graphite felt electrode prepared by the above two methods is capable of improving the anode reaction redox current, enhancing theelectrochemical reversibility and reducing the charge transfer impedance, and has the potential to improve the performance of the all-vanadium flow battery.

Description

technical field [0001] The invention relates to a graphite felt electrode and a preparation method thereof, in particular to a nitrogen-doped reduced graphene oxide modified graphite felt electrode and a preparation method thereof. Background technique [0002] All-vanadium flow battery (VFB) is a kind of vanadium element with four different valence ions (V 3+ / V 2+ and VO 2+ / VO 2 + ) and a certain concentration of sulfuric acid solution to form a reaction electrolyte, through two peristaltic pumps, the electrolyte circulates on both sides of the proton exchange membrane, and the special battery energy storage system that completes the current loop by ion conduction, as a large-scale storage It can be widely used in wind energy, solar energy storage, and power grid peak shaving and other fields. [0003] Graphite felt, as a kind of carbon material, is currently the main electrode material in the field of all-vanadium redox flow batteries, and has the advantages of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/96
CPCH01M4/88H01M4/8882H01M4/96Y02E60/50
Inventor 孙红李强刘甲强李洁喻明富
Owner SHENYANG JIANZHU UNIVERSITY
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