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Preparation method of nitrogen-doped graphene electrode material

A technology of nitrogen-doped graphene and electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of unstable operation of electrodes for a long time, and achieve the effects of simple preparation process, good stability, and good output power

Active Publication Date: 2017-02-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a shortcoming that the electrode is unstable for a long time

Method used

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  • Preparation method of nitrogen-doped graphene electrode material
  • Preparation method of nitrogen-doped graphene electrode material
  • Preparation method of nitrogen-doped graphene electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0049]Use carbon paper (2*2*1cm) as the base, clean the carbon paper in 1.0 M HCl solution, soak for 5 minutes, remove impurities, and wash with deionized water; continue to wash with 1.0 M NaOH, rinse with deionized water . Next, the carbon paper was electrolyzed in water; two pieces of carbon paper were used as positive and negative electrodes respectively, and an alternating current of 15 V was applied between the positive and negative electrodes, and the electrolysis time was 8 minutes. Among them, the carbon paper electrode specification is 2*2*1cm. During the electrolysis process, the distance between the two electrodes is 6 cm, and the 2*2cm sides are facing each other. After electrolysis, the carbon paper was immersed in 10 mM dopamine hydrochloride buffer (pH 7.0) for self-polymerization reaction at room temperature for 30 minutes. The carbon paper obtained after electrolysis was taken out, dried, and calcined at 950° C. for 12 minutes under the protection of nitroge...

Embodiment 2

[0053] Use carbon paper (2*2*0.5cm) as the base, clean the carbon paper in 1.0 M HCl solution to remove impurities, soak for 5 minutes, wash with deionized water, continue to wash with 1.0 M NaOH solution, and deionize Wash with water. Next, the carbon paper was electrolyzed in water; two pieces of carbon paper were used as positive and negative electrodes respectively, and an alternating current of 12 V was applied between the positive and negative electrodes, and the electrolysis time was 10 minutes. Among them, the carbon paper electrode specification is 2*2*0.5cm. During the electrolysis process, the distance between the two electrodes is 5cm, and the 2*2cm sides are facing each other. After the electrolysis, the carbon paper was immersed in 10 mM dopamine hydrochloride buffer solution (pH 7.0) for self-polymerization reaction for 30 minutes. The carbon paper was taken out, dried, and calcined at 900° C. for 15 minutes under the protection of nitrogen to obtain a nitrogen...

Embodiment 3

[0057] With graphite plate (2*2*0.5cm) as the base, clean the carbon paper in 1.0 M HCl solution to remove impurities, soak in HCl solution for 5 minutes, wash with deionized water; continue to wash with 1.0 M NaOH solution , washed with deionized water; then, the graphite plate was electrolyzed in an aqueous solution. Two graphite plates are used as positive and negative electrodes respectively. An alternating current of 10 V was applied between the positive and negative electrodes, and the electrolysis time was 20 minutes. Among them, the carbon paper electrode specification is 2*2*0.5cm. During the electrolysis process, the distance between the two electrodes is 5cm, and the 2*2cm sides are facing each other. After electrolysis, the carbon paper was immersed in egg white solution (5 mL egg white / 100 mL water) for 30 minutes. The graphite plate was taken out, dried, and calcined at 850° C. for 20 minutes under the protection of nitrogen to obtain a nitrogen-doped graphene ...

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Abstract

The invention discloses a preparation method of a nitrogen-doped graphene electrode material. The preparation method comprises the following steps: 1) using a carbon-based material as a substrate; 2) putting the carbon-based material into water, and applying current between a positive electrode and a negative electrode for electrolysis; 3) after the electrolysis is finished, immerging the carbon-based material into a nitrogen-containing compound solution for soaking; 4) taking out the carbon-based material, drying, and carbonizing in an anaerobic condition to obtain the nitrogen-doped graphene electrode. According to the method disclosed by the invention, conventional water is taken as an electrolyte solution, and chemical agents with relatively high toxicity such as potassium permanganate, sulfuric acid and hydrogen peroxide are not needed; the carbon-based material with uniform gaps can be obtained by using alternating current to replace original direct current; and nitrogen element is deposited on the surface of the electrode by using carbonization, so that the nitrogen-doped graphene electrode is prepared and obtained. The method disclosed by the invention is simple and quick in preparation process, the obtained electrode is relatively high in output power, the long-time operational stability is relatively high, and the method is a sustainable in-situ preparation nitrogen-doped graphene electrode method.

Description

technical field [0001] The invention specifically relates to a preparation method of a nitrogen-doped graphene electrode material. Background technique [0002] MFC is a device that uses electroactive microorganisms to oxidize organic matter to generate electricity. Because it can treat sewage and generate electricity, it is considered a green energy technology and the most promising new technology for sewage treatment in the future. However, the current low power output of this technology limits its application in production. There are several ways to increase its power: ① high-efficiency anode materials; ② high-efficiency cathode catalysts; ③ reactor configuration design; ④ optimization of operating conditions. Larger specific surface area and good biocompatibility are the preferred factors for selecting anode supports. Anode surface modification with nanomaterials and conductive polymers is the preferred method to obtain anodes with large specific surface area. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16H01M4/86H01M4/88H01M4/90
CPCH01M4/86H01M4/8647H01M4/88H01M4/90H01M4/9083H01M8/16Y02E60/50
Inventor 唐家桓陈姗姗周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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