All-solid flexible micro super capacitor based on GQD/Co(OH)2 composite material

A technology of supercapacitors and composite materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid capacitor current collectors, and hybrid/electric double layer capacitors. It can solve the problems of low matrix selectivity, short cycle life, and small specific capacitance, and achieve The effect of high energy density, high specific capacity, and small volume

Active Publication Date: 2017-12-15
GUANGDONG JIUZHOU SOLAR ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current flexible micro-supercapacitors still have disadvantages such as low substrate selectivity, small specific capacitance, large impedance, and short cycle life.

Method used

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  • All-solid flexible micro super capacitor based on GQD/Co(OH)2 composite material
  • All-solid flexible micro super capacitor based on GQD/Co(OH)2 composite material
  • All-solid flexible micro super capacitor based on GQD/Co(OH)2 composite material

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Experimental program
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Embodiment 1

[0028] A GQD / Co(OH) based 2 The all-solid flexible micro-supercapacitor of composite material, its preparation comprises the following steps:

[0029] (1) Preparation of a nanoporous gold wire current collector: a gold-silver alloy wire with a diameter of 300 μm was immersed in nitric acid for 48 hours, and cleaned after corrosion.

[0030] (2)GQD / Co(OH) 2 Preparation of composite materials

[0031] a) Synthesis of GQD: Pour 540mg of graphite oxide into 40mL of organic solvent (DMF), mix evenly with ultrasound, transfer to a reaction kettle for solvothermal reaction, the temperature is 200°C, and the reaction time is 8h; after the reaction is completed, cool to room temperature, After pouring out, use a 200 μm microporous membrane to filter to obtain the GQD solution;

[0032] b)GQD / Co(OH) 2 The preparation of composite material: dry a) make GQD solution, the GQD powder of gained is diluted to three times volume (120mL) of original organic solution with deionized water (th...

Embodiment 2

[0039] The present invention is based on GQD / Co(OH) 2 An all-solid flexible micro-supercapacitor of composite materials, which comprises the following steps:

[0040] (1) Preparation of a nanoporous gold wire current collector: a gold-silver alloy wire with a diameter of 20 μm was immersed in nitric acid for 12 hours, and cleaned after corrosion.

[0041] (2)GQD / Co(OH) 2 Preparation of composite materials

[0042] a) Synthesis of GQD: 540mg of graphite oxide was poured into 40mL of organic solvent (DMF), mixed evenly by ultrasonic, transferred to the reaction kettle for solvothermal reaction, the reaction temperature was 160°C, the reaction time was 10h, after the reaction was completed, cooled to room temperature, poured After extraction, the GQD solution was obtained by suction filtration with a 450 μm microporous membrane.

[0043] b)GQD / Co(OH) 2 Preparation of composite materials: Dilute the GQD powder obtained after drying the GQD solution to three times (120mL) of the ...

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Abstract

The invention provides an all-solid flexible micro super capacitor based on a GQD / Co(OH)2 composite material. The positive electrode of the all-solid flexible micro super capacitor is prepared from a GQD / Co(OH)2 composite material. The GQD / Co(OH)2 composite material is prepared according to the steps as follows: evenly mixing the aqueous solution of GQD (Graphene Quantum Dot) powder, Co(NO3)<2>.6H2O, KCl and water; and getting the GQD / Co(OH)2 composite material through galvanostatic deposition with the mixed solution as electrolyte and nanoporous gold wires as working electrodes. The all-solid flexible micro super capacitor based on a GQD / Co(OH)2 composite material provided by the invention has good conductivity and high energy density, and the capacity thereof is easy to control.

Description

technical field [0001] The invention belongs to the technical field of all-solid flexible micro-supercapacitors, in particular to a GQD / Co(OH)-based 2 Composite all-solid-state flexible micro-supercapacitors. Background technique [0002] All-solid-state flexible micro-supercapacitors have obvious advantages in terms of power density and foldable bending, and are gradually becoming an emerging and cutting-edge research direction in the field of chip energy storage devices. It can be used as a miniature power source and is compatible with microelectronic devices, and has great application prospects. However, current flexible micro-supercapacitors still have disadvantages such as low substrate selectivity, small specific capacitance, large impedance, and short cycle life. Therefore, the development of new high-efficiency flexible micro-supercapacitors has become a hot spot for current researchers. The key is to ensure that the device is flexible and portable while improving ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/68H01G11/70H01G11/72H01G11/84H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/68H01G11/70H01G11/72H01G11/84H01G11/86
Inventor 陈心满夏秋雨冀凤振张晓楠王栋梁章勇
Owner GUANGDONG JIUZHOU SOLAR ENERGY TECH CO LTD
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