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Process for preparing stretchable supercapacitor based on highly conductive graphene/nickel particle mixed structure

A technology of supercapacitors and hybrid structures, applied in the field of capacitors, can solve the problems of complex preparation process of stretchable graphene-based active materials, inability to directly apply stretchable supercapacitors, and affecting the performance of stretchable supercapacitors. Low peak, good conductivity, simple and controllable effect

Inactive Publication Date: 2015-09-02
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are still two problems to be solved in the preparation of high-performance graphene-based active electrodes and their stretchable supercapacitors: 1. The preparation process of stretchable graphene-based active materials is complicated and the preparation cost is high
However, nickel foam cannot be stretched and cannot be directly applied in stretchable supercapacitors
If no current collector is used, the performance of the stretchable supercapacitor will be affected due to the large contact resistance between graphene and the external conductor that leads the current.

Method used

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  • Process for preparing stretchable supercapacitor based on highly conductive graphene/nickel particle mixed structure
  • Process for preparing stretchable supercapacitor based on highly conductive graphene/nickel particle mixed structure
  • Process for preparing stretchable supercapacitor based on highly conductive graphene/nickel particle mixed structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Take nickel foam with a size of 8cm×8cm and place it in a tube furnace;

[0052] 2. Turn on the vacuum pump to pump the air pressure of the tube furnace to the ultimate vacuum state of 3×10 -6 Torr;

[0053] 3. Keep vacuum 3×10 -6 After Torr for 15 minutes (the effect of vacuum for 15 minutes is to remove impurities, air, etc. inside the quartz tube to ensure that the reaction chamber is clean), the air pressure of the quartz tube 3 is raised to 3 × 10 -3 Torr;

[0054] 4. Set the hydrogen flow meter to 100sccm, and inject hydrogen into the vacuum chamber;

[0055] 5. After the tube furnace temperature rises to 300°C, anneal at a constant temperature for 20 minutes;

[0056] 6. After the tube furnace temperature rises to 1000°C, inject methane into the vacuum chamber, set the gas flow meter to 200 sccm, and stay for 30 minutes for growth;

[0057] 7. Turn off the methane gas flow meter and quickly lower the temperature of the tube furnace to room temperature at ...

Embodiment 2

[0079] Graphene is grown on a nickel foam substrate and finally a graphene / nickel particle hybrid structure is grown to prepare a stretchable capacitor, including the following preparation steps

[0080] 1. Take nickel foam with a size of 8cm×9cm and place it in a tube furnace;

[0081] 2. Turn on the vacuum pump to pump the air pressure of the tube furnace to the ultimate vacuum state of 3×10 -6 Torr;

[0082] 3. Keep vacuum 3×10 -6 After Torr for 15 minutes (the effect of vacuum for 15 minutes is to remove impurities, air, etc. inside the quartz tube to ensure that the reaction chamber is clean), the air pressure of the quartz tube 3 is raised to 3 × 10 -3 Torr;

[0083] 4. Set the hydrogen flow meter to 100sccm, and inject hydrogen into the vacuum chamber;

[0084] 5. After the tube furnace temperature rises to 300°C, anneal at a constant temperature for 20 minutes;

[0085] 6. After the tube furnace temperature rises to 1000°C, inject methane into the vacuum chamber, ...

Embodiment 3

[0110] Graphene is grown on a nickel foam substrate and finally a graphene / nickel particle hybrid structure is grown to prepare a highly conductive stretchable capacitor, including the following preparation steps:

[0111]1. Take nickel foam with a size of 5cm×9cm and place it in a tube furnace;

[0112] 2. Turn on the vacuum pump to pump the air pressure of the tube furnace to the ultimate vacuum state of 3×10 -6 Torr;

[0113] 3. Keep vacuum 3×10 -6 After Torr for 15 minutes (the effect of vacuum for 15 minutes is to remove impurities, air, etc. inside the quartz tube to ensure that the reaction chamber is clean), the air pressure of the quartz tube 3 is raised to 3 × 10 -3 Torr;

[0114] 4. Set the hydrogen flow meter to 100sccm, and inject hydrogen into the vacuum chamber;

[0115] 5. After the tube furnace temperature rises to 300°C, anneal at a constant temperature for 20 minutes;

[0116] 6. After the tube furnace temperature rises to 1000°C, inject methane into th...

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Abstract

The invention relates to a process for preparing a stretchable supercapacitor based on a highly conductive graphene / nickel particle mixed structure. Firstly, a chemical vapor deposition method is used for preparing spongy graphene material on a nickel foam, and the prepared graphene / nickel foam are immersed in an etching solution for slow reaction so that most of the nickel metal can be chemically displaced into various small nickel particles; secondly, the spongy graphene / nickel particle mixed structure is fished out from the etching solution by using a seal-type fishing method, cleaned and dried, and a pre-stretched elastic substrate slowly returns back to the original length or area; and thirdly, the prepared stretchable graphene / nickel particle mixed structure is used as electrode material, and an all-solid-state stretchable supercapacitor is prepared according to the elastomer / electrode / solid electrolyte / electrode / elastomer structure. According to the invention, the capacitance of a conventional capacitor is increased, contact resistance is reduced, the stretching stability, frequency and performance are excellent, the cost is low, and the method is controllable and suitable for mass production.

Description

technical field [0001] The invention relates to a preparation method of a stretchable capacitor, in particular to a preparation method of a stretchable supercapacitor with a highly conductive sponge-like graphene / nickel particle mixed nanostructure, belonging to the technical field of capacitors. Background technique [0002] As a new type of electronic equipment today, stretchable electronic devices can still exhibit good electrical properties under the condition of large mechanical stress, and have a wide range of applications in human implants, flexible portable devices, wearable devices, wireless sensing devices, etc. the use of. To realize its independent driving ability, it is particularly important to develop stretchable energy storage devices such as supercapacitors. However, the progress of related research is relatively slow, mainly because it is difficult to prepare stretchable electrode materials with excellent electrical and electrochemical properties. [0003...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/36H01G11/24B22F1/02
CPCH01G11/24H01G11/30H01G11/36H01G11/86B22F1/16Y02E60/13
Inventor 杨诚毕懿卿路婧张超满宝元姜守振
Owner SHANDONG NORMAL UNIV
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