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Preparation method of supercapacitor with flexible stress sensing function

A supercapacitor and stress sensing technology, which is applied in the manufacture of hybrid/electric double layer capacitors, electrolytic capacitors, hybrid capacitor electrodes, etc., can solve the problems of inability to clearly feedback force and electrical signals, poor performance of positive and negative poles of supercapacitors, and inability to adapt Flexible stress changes and other issues, to achieve the effect of improving sensitivity and response speed, low price, and enhancing device stability

Active Publication Date: 2020-04-10
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For supercapacitors, there are few researches on the changes of the raw material composition and structural structure of the device. At the same time, there are often poor compatibility, poor performance of positive and negative electrodes of supercapacitors, and inability to adapt to changes in flexible stress. The capacitance value of the sensor is too small to be obvious. Problems such as feedback force and electrical signal exist

Method used

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  • Preparation method of supercapacitor with flexible stress sensing function
  • Preparation method of supercapacitor with flexible stress sensing function
  • Preparation method of supercapacitor with flexible stress sensing function

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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 nanowire, add ethanol and cent...

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 nanowire, add ethanol and cent...

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Abstract

The invention provides a preparation method of a supercapacitor with a flexible stress sensing function. The preparation method comprises the following steps: S1) preparing silver nanowires; S2) preparing a supercapacitor positive electrode material; S3) preparing a supercapacitor negative electrode material; and S4) preparing an aqueous gel electrolyte and an intermediate diaphragm. Different kinds of metal are deposited through adoption of an electro-deposition method to prepare the electrode, the method is simple, low in cost and easy to operate, and large-scale batch production can be achieved; the sponge serving as the dielectric layer has the effect of obviously improving the initial capacitance and strain, so that the sensitivity and the response speed of the sensor performance areimproved, and the device stability is enhanced; the silver nanowire enhances the conductivity of the electrode; and the asymmetric double electrodes are higher in specific capacity, high in rate capability and long in stability. The characteristics of hard outer part and soft inner part are beneficial to recovering to the original state after strain. The sensor has the super-capacitor performanceand the flexible stress sensing performance, and is wider in application range.

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-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/22H01G11/30H01G11/52H01G11/56H01G11/66H01G11/68G01L1/14B22F9/16C25D7/00B82Y30/00B82Y40/00
CPCH01G11/84H01G11/86H01G11/22H01G11/30H01G11/52H01G11/56H01G11/66H01G11/68G01L1/142B22F9/16C25D7/00B82Y30/00B82Y40/00B22F2009/165Y02E60/13
Inventor 沈耿哲何鑫梁天龙杨为家陈柏桦
Owner WUYI UNIV
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