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Graphene/Na2S composite nano material used for super capacitor and preparation method thereof

A technology of composite nanomaterials and supercapacitors, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as complex procedures, difficult process control, and insufficient performance stability, and achieve simple equipment technology and easy operation Easy to do, good performance effects

Inactive Publication Date: 2018-01-16
南陵县生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the composite nanomaterials of graphene and sulfide are usually prepared in solution, the process is complicated, and the process is not easy to control, so the performance stability is not enough.

Method used

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  • Graphene/Na2S composite nano material used for super capacitor and preparation method thereof
  • Graphene/Na2S composite nano material used for super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Mix graphene powder and Na2S powder according to the ratio of mass percentage 72.5:27.5, and then mechanically grind for 3 hours to make it evenly mixed;

[0019] 2) Perform rapid annealing treatment on the above mixed material, pass N 2 -H 2 S mixed gas, gas pressure is normal pressure, N 2 and H 2 The partial pressure ratio of S is 10:90. When the temperature rises to the set value of 1000°C, put the mixed material into the annealing area, and the annealing time is 30 seconds;

[0020] 3) After annealing, stop feeding N 2 , only feed H2S, and evacuate the vacuum to 100 Pa within 10 seconds, then maintain the vacuum in the H2S atmosphere, and naturally cool to room temperature to obtain graphene / Na2S composite nanomaterials.

[0021] For the prepared graphene / Na 2 S-composite nanomaterials were subjected to morphology analysis using transmission electron microscopy (TEM). figure 1 For the graphene / Na that this embodiment obtains 2 Transmission electron micros...

Embodiment 2

[0024] 1) Mix graphene powder with Na 2 The S powder was mixed according to the ratio of mass percentage 70:30, and then mechanically ground for 3 hours to make it evenly mixed;

[0025] 2) Perform rapid annealing treatment on the above mixed material, pass N 2 -H 2 S mixed gas, gas pressure is normal pressure, N 2 and H 2 The partial pressure ratio of S is 10:90. When the temperature rises to the set value of 1000°C, put the mixed material into the annealing area, and the annealing time is 30 seconds;

[0026] 3) After annealing, stop feeding N 2 , only through H 2 S, and pump the vacuum to 100Pa within 10 seconds, then in H 2 Maintain the vacuum degree in the S atmosphere, cool down to room temperature naturally, and obtain the graphene / Na2S composite nanomaterial.

[0027] To the graphene / Na that present embodiment makes 2 The morphology of the S composite nanomaterial was analyzed using a transmission electron microscope (TEM), and the morphology was basically the ...

Embodiment 3

[0029] 1) Mix graphene powder with Na 2 The S powder was mixed according to the ratio of mass percentage 75:25, and then mechanically ground for 3 hours to make it evenly mixed;

[0030] 2) Perform rapid annealing treatment on the above mixed material, pass N 2 -H 2 S mixed gas, gas pressure is normal pressure, N 2 and H 2 The partial pressure ratio of S is 10:90. When the temperature rises to the set value of 1000°C, put the mixed material into the annealing area, and the annealing time is 30 seconds;

[0031] 3) After annealing, stop feeding N 2 , only through H 2 S, and pump the vacuum to 100Pa within 10 seconds, then in H 2 Maintain the vacuum degree in the S atmosphere, cool down to room temperature naturally, and obtain the graphene / Na2S composite nanomaterial.

[0032] To the graphene / Na that present embodiment makes 2 The morphology of the S composite nanomaterial was analyzed using a transmission electron microscope (TEM), and the morphology was basically the sa...

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Abstract

The present invention discloses a graphene / Na2S composite nano material used for a super capacitor and a preparation method thereof. The method comprises the following steps of 1) mixing the graphenepowder and the Na2S powder according to the proportion of a certain mass percent, grinding to mix uniformly; 2) annealing the above mixed material rapidly, injecting an N2-H2S mixed gas, wherein the gas pressure intensity is the normal pressure and the intrinsic standoff ratio of the N2 and the H2S is 10:90; when the temperature rises to a set value 1000 DEG C, putting the mixed material in an annealing area, wherein the annealing time is 30 seconds; 3) after annealing, maintaining a vacuum degree in the H2S atmosphere, and naturally cooling to a room temperature, thereby obtaining the graphene / Na2S composite nano material. The present invention also discloses the graphene / Na2S composite nano material prepared by the above preparation method, wherein most of the Na2S is granular, a small part of the Na2S is nano wire-shaped, the grapheme is a two-dimensional sheet structure, and the Na2S is distributed and attached to the sheet-like grapheme.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to the field of composite nanomaterials of graphene and sulfide. Background technique [0002] The development of supercapacitors began in the 1970s. It is a new type of energy storage element between traditional capacitors and batteries. The theoretical capacitance of supercapacitors is thousands of times that of ordinary capacitors, the power density is dozens of times higher than that of ordinary batteries, the number of charge and discharge cycles can reach 100,000 times, and it can work under severe temperature conditions without pollution to the environment . Due to the above advantages, since the emergence of supercapacitors, it has attracted extensive attention from all over the world as a new type of energy storage device. Supercapacitors have broad application prospects in many fields, such as electric vehicles, industrial power supplies, military aerospace, etc. Howev...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01G11/86
CPCY02E60/13
Inventor 刘海燕
Owner 南陵县生产力促进中心