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An all-solid-state flexible micro-supercapacitor based on GQD/cobalt hydroxide composite

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: 2019-08-16
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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  • An all-solid-state flexible micro-supercapacitor based on GQD/cobalt hydroxide composite
  • An all-solid-state flexible micro-supercapacitor based on GQD/cobalt hydroxide composite
  • An all-solid-state flexible micro-supercapacitor based on GQD/cobalt hydroxide composite

Examples

Experimental program
Comparison scheme
Effect test

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: Pour 540mg of graphite oxide into 40mL of organic solvent (DMF), mix evenly with ultrasound, transfer to a reaction kettle for solvothermal reaction, the reaction temperature is 160°C, the reaction time is 10h, after the reaction is completed, cool to room temperature, pour 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: The GQD powder obtained after drying the GQD solution was diluted with deionized water to three times (120mL)...

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Abstract

The present invention provides a kind of based on GQD / Co(OH) 2 An all-solid flexible micro-supercapacitor of composite material, the positive electrode of the all-solid-state flexible micro-supercapacitor adopts GQD / Co(OH) 2 Composite materials are prepared, the GQD / Co(OH) 2 Composite material is made according to the method comprising following steps: the aqueous solution of GQD (graphene quantum dot) powder, Co(NO 3 ) 2 .6H 2 O, KCl and water are evenly mixed, the mixed solution is used as the electrolyte, and the nanoporous gold wire is used as the working electrode to obtain GQD / Co(OH) by constant current deposition 2 composite material. Based on GQD / Co(OH) provided by the present invention 2 The all-solid flexible micro-supercapacitor of the composite material has good conductivity and high energy density, and its capacity 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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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/68H01G11/70H01G11/72H01G11/84H01G11/86
CPCY02E60/13
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