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Fabrication method of PEDOT:PSS-coated nano MnO<2>-based graphene nano wall electrode

A technology of graphene nano-wall and manufacturing method, which is applied in the direction of nanotechnology, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of limited surface area improvement, poor graphene wall structure, small effective surface area, etc., and achieve good dispersion and improved Scatter, avoid the effect of agglomeration

Active Publication Date: 2016-03-16
GUANGZHOU MOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the graphene wall prepared by pure plasma chemical vapor deposition is poor, and the distance between the walls is relatively large, so the improvement of the surface area is limited.
In addition, graphene nanowalls without surface modification are extremely hydrophobic, and their applications are limited. They are subsequently used in the process of preparing devices, such as electrodes for supercapacitors, lithium-ion batteries, and nanoparticle modification, liquid ( Such as electrolyte) cannot wet the interior of the graphene wall, resulting in an extremely small effective surface

Method used

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  • Fabrication method of PEDOT:PSS-coated nano MnO&lt;2&gt;-based graphene nano wall electrode
  • Fabrication method of PEDOT:PSS-coated nano MnO&lt;2&gt;-based graphene nano wall electrode
  • Fabrication method of PEDOT:PSS-coated nano MnO&lt;2&gt;-based graphene nano wall electrode

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Embodiment 1

[0036] Copper sheet is used as substrate 1, and graphene nanowall 2 is prepared by PECVD; nano-MnO coated with PEDOT:PSS (mass ratio 1:1) is prepared using manganese chloride as a precursor 2 Particle graphene nano-wall supercapacitor electrode, specific structure see figure 1 .

[0037] in CH 4 The plasma was used as a precursor, and Cu was heated to 800 °C in a PECVD reactor by passing argon and hydrogen at the same time. The graphene nano-wall 2 is grown on the substrate 1 by the PECVD method, and the growth time is controlled to be 30 minutes, so that the graphene nano-wall 2 with a height of 1 micron can be obtained. to N 2 The plasma was bombarded at 50W for 100s. Manganese chloride is used as a precursor and dissolved in water or ethanol. Add 1 part by mass of manganese chloride to the solution and stir thoroughly at 50°C to obtain a 0.5 mol / L manganese chloride solution. Add the citric acid of 5 mass parts in the manganese chloride solution that obtains as chelat...

Embodiment 2

[0040] Using metal nickel as the substrate, using PECVD to prepare graphene nanowalls; using manganese chloride as a precursor to prepare nano-MnO coated with PEDOT:PSS (mass ratio 1:2) 2 Granular graphene nanowall electrodes.

[0041] in CH 4 The plasma of Ni was used as a precursor, and Ni was heated to 800 °C in a PECVD reactor. The graphene nanowall is grown on the substrate by PECVD method, and the growth time is controlled to 60 minutes, and the graphene nanowall with a height of 3 microns can be obtained. with O 2 The plasma was bombarded for 210s at 60W power. Manganese chloride is used as a precursor and dissolved in water or ethanol. Add 5 parts by mass of manganese chloride to the solution, and stir thoroughly at 50°C to obtain a 0.5 mol / L manganese chloride solution. Add the tartaric acid of 10 mass parts in the manganese chloride solution that obtains as chelating agent. Concentrated hydrochloric acid was added dropwise to adjust the pH to 3. Then add 2-10 ...

Embodiment 3

[0043] Using silicon wafers as substrates, PECVD is used to prepare graphene nanowalls; manganese chloride is used as a precursor to prepare nano-MnO coated with PEDOT:PSS (1:0.5) 2 Granular graphene nanowall electrodes.

[0044] in CH 4 Plasma is used as a precursor, and the Si wafer is heated to 1000°C in a PECVD reactor. The graphene nanowall is grown on the substrate by PECVD method, and the growth time is controlled to be 150 minutes, and the graphene nanowall with a height of 5 microns can be obtained. Take NH 3 The plasma was bombarded at 100W for 165s. Manganese chloride is used as a precursor and dissolved in water or ethanol. Add 2 parts by mass of manganese chloride to the solution, and stir well at 50°C. Obtain 0.2mol / L manganese chloride solution. Add 4 parts by mass of citric acid to the obtained manganese chloride solution, tartaric acid is used as a chelating agent, and concentrated hydrochloric acid is added dropwise to adjust the pH to 3. Add 2-10 mass...

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Abstract

The invention discloses a fabrication method of a PEDOT:PSS-coated nano MnO<2> particle-based graphene nano wall electrode. The method comprises the following steps: (1) preparing a graphene nano wall; (2) carrying out modification on the surface of the graphene nano wall; (3) depositing a PEDOT:PSS / MnO<2> thin film on the graphene nano wall; and (4) carrying out heat treatment on a PEDOT:PSS / MnO<2> thin film-loaded graphene wall / substrate in a nitrogen environment at 100-400 DEG C. According to the super capacitor electrode prepared by the method disclosed by the invention, the conductivity of the graphene wall is enhanced through a PEDOT:PSS conductive polymer; corrosion to MnO<2> caused by an electrolyte is reduced by the super capacitor electrode as a protection layer; the electrode with electric double layers and pseudocapacitance characteristic is achieved through the graphene nano wall and PEDOT:PSS-coated MnO<2> nano-particles; compared with a traditional graphene wall, the specific capacitance is improved by more than 10 times; and the graphene nano wall electrode is simple in technological process and low in cost, and can be produced on a large scale.

Description

technical field [0001] The invention relates to the technical field of electronic materials for energy storage materials and electrical components, in particular to the technical field of doped nano-particle graphene supercapacitor materials. Background technique [0002] Supercapacitor (supercapacitor, ultracapacitor) is one of the most promising electrochemical energy storage technologies. Also known as electrical double layer capacitor (Electrical Doule-Layer Capacitor), electrochemical capacitor (Electrochemcial Capacitor, EC), gold capacitor, farad capacitor, store energy through polarized electrolyte. A supercapacitor can be regarded as two non-reactive porous electrode plates suspended in the electrolyte. When electricity is applied to the plates, the positive plate attracts negative ions in the electrolyte, and the negative plate attracts positive ions, actually forming two capacitive storage layer, the separated positive ions are near the negative plate, and the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/46B82Y30/00H01G11/86
CPCY02E60/13H01G11/36B82Y30/00H01G11/46H01G11/86
Inventor 郝奕舟陈剑豪王天戌
Owner GUANGZHOU MOXI TECH CO LTD
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