Preparation of graphene/manganese oxide flexible electrode for super capacitor by employing laser one-step method

A supercapacitor, manganese oxide flexible technology, applied in the field of electrochemistry, can solve problems such as waste of raw materials, complicated process, and environmental pollution by waste materials

Inactive Publication Date: 2016-11-09
于有海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite materials prepared by these methods have high conductivity and relatively large specific capacity, but th

Method used

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  • Preparation of graphene/manganese oxide flexible electrode for super capacitor by employing laser one-step method
  • Preparation of graphene/manganese oxide flexible electrode for super capacitor by employing laser one-step method
  • Preparation of graphene/manganese oxide flexible electrode for super capacitor by employing laser one-step method

Examples

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Effect test

Embodiment 1

[0039] Graphene oxide (GO) was prepared by the improved Hummer method, taking 0.1g of GO, MnSO 40.2g, add distilled water, mix and stir to obtain a mixed solution;

[0040] Apply the obtained mixed solution evenly on the PET film, and dry it to obtain the electrode precursor;

[0041] N at a flow rate of 1 l / min 2 In the atmosphere, use a laser with a power of 300mW and a scan rate of 8 cm / s for irradiation reduction. The laser irradiation route can be set according to the needs. When GO is reduced by laser irradiation, MnSO 4 It is decomposed into manganese oxide to obtain graphene / manganese oxide flexible electrode;

Embodiment 2

[0043] GO was prepared by the improved Hummer method, GO 0.1g, MnCO 3 0.3g, added into distilled water, mixed and stirred to obtain a mixed solution;

[0044] Apply the obtained mixed solution evenly on the polyimide (PI) film, and dry it to obtain the electrode precursor;

[0045] N at a flow rate of 0.5 l / min 2 Under the atmosphere, use a laser with a power of 200mW and a scan rate of 6 cm / s for irradiation reduction. The laser irradiation route can be set according to the needs. When GO is reduced by laser irradiation, MnCO 3 It is decomposed into manganese oxide to obtain graphene / manganese oxide flexible electrode;

Embodiment 3

[0047] Positive and negative electrodes all adopt the graphene / manganese oxide flexible electrode that obtains in embodiment 1, use Na 2 SO 4 / Smoked silica gel is used as the electrolyte and packaged to obtain a symmetrical supercapacitor. Such as image 3 As shown, the graphene / manganese oxide supercapacitor includes: graphene / manganese oxide C1 and C2 (ie, the graphene / manganese oxide electrode obtained in Example 1); package K, and electrolyte solution (not shown).

[0048] Among them, the graphene / manganese oxide electrodes C1 and C2 are the graphene / manganese oxide electrodes obtained in Example 1, filled with Na2SO4 / smoked silica gel electrolyte (not shown) in the middle, and the electrolyte naturally isolates the electrodes in space, thereby omitting Diaphragm part of a conventional supercapacitor.

[0049] image 3 The K packaging material (light-curing glue) shown in , cures and encapsulates the graphene / manganese oxide electrodes C1 and C2, thereby forming a s...

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Abstract

The invention belongs to the field of electrochemical materials, and discloses a method for preparing graphene/manganese oxide flexible electrodes by using laser one-step in-situ reduction of graphene oxide and decomposing manganese compounds, which is applied to supercapacitors. Wherein the preparation method of the graphene/manganese oxide flexible electrode comprises the following steps: uniformly mixing the aqueous solution of graphene oxide and the compound of manganese, coating on the flexible substrate; under the protection of an inert atmosphere, utilizing laser to irradiate the graphene oxide prepared by the above steps / Manganese compound film: while graphene oxide is reduced to graphene by laser, manganese compound is thermally decomposed to obtain manganese oxide. Pure graphene supercapacitors have low specific capacitance; manganese oxide supercapacitors have poor cycle stability. Combining these two materials can maximize their strengths and avoid weaknesses, give full play to the advantages of both, and obtain supercapacitors with good cycle stability and high specific capacity. The advantages of the present invention are: one-step laser reduction of graphene oxide and decomposition of manganese compounds to obtain reduced graphene and manganese oxide flexible composite electrodes, and assemble them into flexible supercapacitors. The preparation process is simple, the efficiency is high, and the preparation process is green and environmentally friendly. It can be produced industrially.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and mainly relates to a graphene / manganese oxide flexible electrode and a preparation method thereof for a high-performance flexible supercapacitor. Background technique [0002] Due to the increasing shortage of oil resources and the increasingly serious environmental pollution caused by the exhaust emissions of internal combustion engines burning fossil fuels, people are studying new energy devices to replace internal combustion engines. The research and development of hybrid power, fuel cell, and chemical battery products and applications have been carried out, and certain results have been achieved. However, due to their inherent shortcomings such as short service life, poor temperature characteristics, environmental pollution by chemical batteries, complex systems, and high cost, there has been no good solution. Supercapacitors, which have the advantages of high energy density, high power de...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/84H01G11/46H01G11/36
CPCY02E60/13H01G11/86H01G11/36H01G11/46H01G11/84
Inventor 于有海闵永刚彭莉孟冰露
Owner 于有海
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