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Super-capacitor electrode based on vertical oriented graphene and manufacturing method thereof

A supercapacitor, vertical orientation technology, applied in the direction of capacitors, electrolytic capacitors, circuits, etc., can solve the problems of complicated process and difficult promotion, so as to improve the speed of adsorption and desorption, reduce negative effects, and avoid the use of binders Effect

Inactive Publication Date: 2012-07-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has achieved certain results in laboratory-scale research, but overall the process is more complicated and difficult to promote

Method used

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  • Super-capacitor electrode based on vertical oriented graphene and manufacturing method thereof
  • Super-capacitor electrode based on vertical oriented graphene and manufacturing method thereof
  • Super-capacitor electrode based on vertical oriented graphene and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: A stainless steel sheet is used as a current collector, and a normal pressure normal glow discharge plasma-enhanced vapor deposition technique is used to manufacture a supercapacitor electrode with vertically oriented graphene as an active material.

[0030] A 0.025 mm stainless steel sheet and a needle tip with a taper of 1:10 are placed in a quartz tube, and the quartz tube is placed in a heating furnace. The needle tip is perpendicular to the surface of the stainless steel sheet, and the distance between the needle tip and the stainless steel sheet is 7 mm. The stainless steel sheet is grounded, and the needle tip is connected to a high-voltage negative power supply. A mixed gas of hydrogen and argon is introduced into the quartz tube (total flow rate: 2000 ml / min; volume ratio: 1:1), and the stainless steel sheet is heated to 700 oc. On hold at 700 o Under the premise of C heating, the mixed gas of hydrogen and argon is closed, and the mixed gas of arg...

Embodiment 2

[0031] Example 2: Using nickel foam as a current collector, the normal pressure normal glow discharge plasma enhanced vapor deposition technology is used to fabricate a supercapacitor electrode with vertically oriented graphene as an active material.

[0032] Place nickel foam and a needle tip with a taper of 1:10 in the quartz tube, and the quartz tube is placed in the heating furnace. The needle tip is perpendicular to the surface of the stainless steel sheet, and the distance between the needle tip and the stainless steel sheet is 7 mm. The nickel foam is grounded, and the needle tip is connected to a high-voltage negative power supply. A mixed gas of hydrogen and argon is introduced into the quartz tube (total flow rate: 2000 ml / min; volume ratio: 1:1), and the stainless steel sheet is heated to 1000 by a heating furnace o c. In keeping 1000 o Under the premise of C heating, the mixed gas of hydrogen and argon is closed, and the mixed gas of argon, acetylene and water v...

Embodiment 3

[0033] Example 3: Using copper sheets as current collectors, microwave plasma enhanced vapor deposition technology was used to manufacture supercapacitor electrodes with vertically oriented graphene as active materials.

[0034] Place the copper sheet inside the microwave plasma reactor. The plasma reactor was pumped down to 100 Pa. Turn on the microwave plasma reactor and adjust the input power to 600 watts to heat the copper sheet to 600 o c. After 10 minutes, a mixed gas of methane and hydrogen was introduced (total flow rate: 200 ml / min; volume ratio: 10:1), and the microwave plasma input power was adjusted to 800 watts. After 20 minutes, turn off the microwave plasma power supply, turn off methane and hydrogen at the same time, and at the same time pass in a mixture of hydrogen and argon (total flow rate: 200 ml / min; volume ratio: 1:1), and cool down naturally. When the temperature is below 50 o At C, turn off the mixed gas of hydrogen and argon, take out the sample, ...

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Abstract

The invention discloses a super-capacitor electrode based on vertical oriented graphene and a manufacturing method thereof. The electrode comprises a current collector and a graphene nanosheet, wherein the graphene nanosheet is vertical to the surface of the current collector; each graphene nanosheet comprises 1-10 layers of graphene. In the manufacturing process, the current collector is heated to 600-1000 DEG C; a carbon element contained gas is adopted as a precursor gas to generate a plasma; the current collector is placed in the plasma; a vertical oriented graphene nanosheet directly grows on the surface of the current collector by using a plasma reinforced chemical vapor deposition method, and after the vertical oriented graphene nanosheet grows for 5 minutes to 8 hours, the obtained current collector with the vertical oriented graphene nanosheet grown on the surface is the super-capacitor electrode. The super-capacitor electrode with the vertical oriented graphene as active material can be made in one step so that the use of adhesives and agglomeration of graphene are avoided, the benefit of material infiltration and ionic diffusion is achieved and the potential in effective energy storage area of the graphene and the property of the super-capacitor is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a vertically oriented graphene-based supercapacitor electrode and a manufacturing method thereof. Background technique [0002] Energy storage is an important link in the process of energy utilization and sustainable development, and the development of energy storage technology is a key factor in promoting the large-scale development of new energy. Supercapacitors are electrochemical energy storage devices between traditional capacitors and secondary batteries. The supercapacitor in the strict sense is an electric double layer capacitor, and its working principle is the interface electric double layer theory (Electrochemical double-layer capacitance) proposed by German physicist H. Helmholtz in 1853, that is, through The charge separation process at the material and electrolyte interface generates electrostatic capacitance for energy storage. Traditional electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 薄拯岑可法严建华王智化池涌
Owner ZHEJIANG UNIV
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