A kind of preparation method of supercapacitor with flexible stress sensing function

Abstract

The invention provides a method for preparing a supercapacitor with a flexible stress sensing function, comprising the following steps: S1), preparation of silver nanowires; S2), preparation of supercapacitor positive electrode materials, S3), preparation of supercapacitor negative electrode materials ; S4), the preparation of aqueous gel electrolyte and intermediate membrane; the present invention deposits different kinds of metals to prepare electrodes by electrodeposition, the method is simple, cheap, easy to operate, and can be produced in large scale; the sponge is used as a dielectric layer It has the effect of significantly improving the initial capacitance and strain, thereby improving the sensitivity and response speed of the sensor performance, and enhancing the stability of the device; silver nanowires enhance the conductivity of the electrode; the asymmetric double electrode has higher specific capacity and high rate performance. long-term stability. The characteristics of hard on the outside and soft on the inside are conducive to returning to the original state after strain. It has both supercapacitive performance and flexible stress sensing performance, and is more widely used.

Description

technical field

[0001] The invention relates to the technical field of supercapacitors, in particular to a method for preparing a supercapacitor with a flexible stress sensing function. Background technique

[0002] Miniaturized electronic components with multiple functions are an important development direction, especially in flexible wearables, flexible energy devices, etc. Specific application directions put forward higher requirements for the size and weight of devices. A single device can only achieve a single functional application, and it is far from meeting people's development needs in terms of device raw materials, structures, applications, etc. Compared with common traditional batteries, flexible supercapacitors have high capacity density and temperature adaptability. Good, stable and long-lasting advantages. At the same time, flexible supercapacitors can be used for flexible stress sensing by exploring changes in electrode materials and device structures. Dual-...

Examples

Embodiment 1

[0037] A method for preparing a supercapacitor with a flexible stress sensing function, comprising the following steps:

[0038] S1), preparation of silver nanowires

[0039] S101), at room temperature, 2 mmol of glucose, 1.5 mmol of silver nitrate, and 0.3 mmol of ferric sulfate were dissolved in deionized water respectively, and then the three reactants were mixed together, and the volume ratio of the reactants was 2:2:1, And obtain a bright yellow solution by magnetic stirring;

[0040] S102), 4.5g of polyvinylpyrrolidone PVP is added to the bright yellow solution in step S101), magnetically stirred until the PVP is fully dissolved, then it is transferred to a high-pressure reactor, and the temperature is Heating at 160°C for 10 hours, after hot water treatment, a gray-green precipitate was obtained;

[0041] S103), then wash the gray-green precipitate several times with dilute nitric acid, remove the oxide layer on the surface of the silver nanowires, add ethanol for sev...

Embodiment 2

[0053] A method for preparing a supercapacitor with a flexible stress sensing function, comprising the following steps:

[0054] S1), preparation of silver nanowires

[0055] S101), at room temperature, 4 mmol of glucose, 3.5 mmol of silver nitrate, and 0.7 mmol of ferric sulfate were dissolved in deionized water respectively, and then the three reactants were mixed together, and the volume ratio of the reactants was 2:2:1, And obtain a bright yellow solution by magnetic stirring;

[0056] S102), 6.5g of polyvinylpyrrolidone PVP is added to the bright yellow solution in step S101), magnetically stirred until the PVP is fully dissolved, then it is transferred to a high-pressure reactor, and the temperature is Heating at 200°C for 10 hours, after hot water treatment, a gray-green precipitate was obtained;

[0057] S103), then wash the gray-green precipitate several times with dilute nitric acid, remove the oxide layer on the surface of the silver nanowires, add ethanol for sev...

technical field

[0001] The invention relates to the technical field of supercapacitors, in particular to a method for preparing a supercapacitor with a flexible stress sensing function. Background technique

[0002] Miniaturized electronic components with multiple functions are an important development direction, especially in flexible wearables, flexible energy devices, etc. Specific application directions put forward higher requirements for the size and weight of devices. A single device can only achieve a single functional application, and it is far from meeting people's development needs in terms of device raw materials, structures, applications, etc. Compared with common traditional batteries, flexible supercapacitors have high capacity density and temperature adaptability. Good, stable and long-lasting advantages. At the same time, flexible supercapacitors can be used for flexible stress sensing by exploring changes in electrode materials and device structures. Dual-...

Examples

Embodiment 1

[0037] A method for preparing a supercapacitor with a flexible stress sensing function, comprising the following steps:

[0038] S1), preparation of silver nanowires

[0039] S101), at room temperature, 2 mmol of glucose, 1.5 mmol of silver nitrate, and 0.3 mmol of ferric sulfate were dissolved in deionized water respectively, and then the three reactants were mixed together, and the volume ratio of the reactants was 2:2:1, And obtain a bright yellow solution by magnetic stirring;

[0040] S102), 4.5g of polyvinylpyrrolidone PVP is added to the bright yellow solution in step S101), magnetically stirred until the PVP is fully dissolved, then it is transferred to a high-pressure reactor, and the temperature is Heating at 160°C for 10 hours, after hot water treatment, a gray-green precipitate was obtained;

[0041] S103), then wash the gray-green precipitate several times with dilute nitric acid, remove the oxide layer on the surface of the silver nanowires, add ethanol for sev...

Embodiment 2

[0053] A method for preparing a supercapacitor with a flexible stress sensing function, comprising the following steps:

[0054] S1), preparation of silver nanowires

[0055] S101), at room temperature, 4 mmol of glucose, 3.5 mmol of silver nitrate, and 0.7 mmol of ferric sulfate were dissolved in deionized water respectively, and then the three reactants were mixed together, and the volume ratio of the reactants was 2:2:1, And obtain a bright yellow solution by magnetic stirring;

[0056] S102), 6.5g of polyvinylpyrrolidone PVP is added to the bright yellow solution in step S101), magnetically stirred until the PVP is fully dissolved, then it is transferred to a high-pressure reactor, and the temperature is Heating at 200°C for 10 hours, after hot water treatment, a gray-green precipitate was obtained;

[0057] S103), then wash the gray-green precipitate several times with dilute nitric acid, remove the oxide layer on the surface of the silver nanowires, add ethanol for sev...

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