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High-flexibility graphene-based supercapacitor based on laser processing and preparation method thereof

A supercapacitor and graphene-based technology, applied in the field of capacitors, can solve the problems of difficult processing of tiny devices, inability to achieve fine processing, and rough processing, and achieve the effects of easy operation, increased area, and improved tensile performance

Pending Publication Date: 2021-11-12
吉林大学重庆研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ordinary photoreduction process is rough and cannot be finely processed, and the processing process of some tiny devices is difficult, so it is necessary to find a more refined processing method
[0007] In addition, the electrolyte is also one of the important components of supercapacitors. At present, most supercapacitor electrolytes are acidic or alkaline substances, which will cause certain harm to the human body and cause irreparable damage to the environment. Therefore, Electrolytes that are harmless to the human body and the environment are being searched for

Method used

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  • High-flexibility graphene-based supercapacitor based on laser processing and preparation method thereof
  • High-flexibility graphene-based supercapacitor based on laser processing and preparation method thereof
  • High-flexibility graphene-based supercapacitor based on laser processing and preparation method thereof

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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, the present embodiment provides a highly flexible graphene-based supercapacitor based on laser processing, the highly flexible graphene-based supercapacitor is a planar structure, composed of graphene / fiber composite electrode 1 and graphene oxide / Composed of a fiber composite diaphragm 2; the graphene / fiber composite electrode 1 is an interdigitated region formed by laser scanning on the surface of the graphene oxide / fiber composite diaphragm 2.

[0049] The graphene / fiber composite electrode 1 has a porous structure, which can increase the specific surface area of ​​the material, is conducive to full contact with the electrolyte, and improves the performance of the supercapacitor; and the surface of the fiber has a large number of oxygen-containing functional groups, which can absorb water molecules in the environment, Generate more water and hydrogen ions, and the graphene oxide / fiber composite electrolyte after absorbing water molecules w...

Embodiment 2

[0052] Such as figure 2 Shown, a kind of preparation method of the highly flexible graphene-based supercapacitor based on laser processing, concrete steps are as follows:

[0053] (1) At room temperature, weigh 2g of graphite, 2g of sodium nitrate and 12g of potassium permanganate; transfer the weighed graphite and sodium nitrate to a 1000mL glass beaker, weigh 100mL of concentrated sulfuric acid through a 100mL graduated cylinder, and Transfer to a beaker, put the stirrer into the beaker, and stir in a constant temperature heating magnetic stirrer; the temperature is 0°C, and the rotation speed is set to 400 rpm; slowly put 12g of potassium permanganate into the medicine spoon within 30 minutes ;Stir for 90 minutes after the addition; adjust the temperature of the constant temperature heating magnetic stirrer to 35°C, and continue stirring for 2 hours after the temperature rise is completed;

[0054] Slowly add 80mL of deionized water dropwise with a rubber dropper, and add...

Embodiment 3

[0070] The preparation process of the highly flexible graphene-based supercapacitor based on laser processing in this embodiment is as follows:

[0071] (1) At room temperature, weigh 2.1 g of graphite, 2.1 g of sodium nitrate and 12.6 g of potassium permanganate. Transfer the weighed graphite and sodium nitrate to a 1000 mL glass beaker. Weigh 100.8mL of concentrated sulfuric acid through a graduated cylinder and transfer it into a beaker. Put the stirring bar into the beaker and stir in a constant temperature heating magnetic stirrer. The temperature was 1 °C, and the rotation speed was set at 400 rpm. Slowly put 12.6g of potassium permanganate into the medicine spoon within 30min. After the addition, stir for another 90 minutes. Adjust the temperature of the constant temperature heating magnetic stirrer to 36°C, and continue stirring for 2 hours after the temperature rise is completed;

[0072] Slowly add 84mL of deionized water dropwise using a rubber-tip dropper, slo...

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Abstract

The invention relates to a high-flexibility graphene-based supercapacitor based on laser processing and a preparation method thereof, and belongs to the technical field of capacitors. The preparation method comprises the following steps: (1) employing a Hummers method to prepare a graphene oxide solution; (2) preparing a fiber solution, fully stirring and mixing the graphene oxide solution prepared in the step (1) and the fiber solution according to a certain mass ratio to prepare a graphene oxide / fiber dispersion liquid, and performing vacuum filtration to prepare a composite material membrane; and (3) processing the composite material membrane obtained in the step (2) into a proper electrode shape through laser to obtain the high-toughness graphene-based supercapacitor based on laser processing. According to the invention, the preparation method is simple in preparation process; the composite material electrode obtained through laser processing is loose and porous, good in water absorption, good in flexibility, excellent in tensile property and high in specific capacitance; as a composite material, compared with a traditional supercapacitor made of a single electrode material, the supercapacitor is higher in energy storage and more stable in circulation; and water is used as electrolyte, so that safety and environment protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and in particular relates to a highly flexible graphene-based supercapacitor based on laser processing and a preparation method thereof. Background technique [0002] The rapid development of smart electronic devices, such as furniture robots and sports bracelets, has greatly promoted the market demand for various energy storage devices. Supercapacitors have attracted extensive attention due to their advantages of ultra-long cycle life and fast charge-discharge speed. [0003] In recent years, with the development of micro-robots, supercapacitors are also developing towards higher energy storage, smaller volume, and better flexibility. [0004] A supercapacitor consists of electrodes, a diaphragm, and an electrolyte. Its typical device structures include layered structure, planar structure and so on. For a supercapacitor with a layered structure, the electrodes on both sides are used as the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/30H01G11/26H01G11/86H01G11/56
CPCH01G11/36H01G11/30H01G11/26H01G11/86H01G11/56Y02E60/13
Inventor 韩冬冬张永来李纪超周昊孙洪波
Owner 吉林大学重庆研究院
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