CN111696793A - Preparation method of NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor - Google Patents
Preparation method of NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor Download PDFInfo
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- CN111696793A CN111696793A CN202010468120.XA CN202010468120A CN111696793A CN 111696793 A CN111696793 A CN 111696793A CN 202010468120 A CN202010468120 A CN 202010468120A CN 111696793 A CN111696793 A CN 111696793A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 37
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 24
- 239000004964 aerogel Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000007773 negative electrode material Substances 0.000 claims abstract description 14
- 239000011245 gel electrolyte Substances 0.000 claims abstract description 12
- 239000007774 positive electrode material Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000007772 electrode material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- TZHYBRCGYCPGBQ-UHFFFAOYSA-N [B].[N] Chemical compound [B].[N] TZHYBRCGYCPGBQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 31
- 239000011259 mixed solution Substances 0.000 claims description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 239000000017 hydrogel Substances 0.000 claims description 20
- 238000004108 freeze drying Methods 0.000 claims description 15
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 14
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 238000009210 therapy by ultrasound Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 101710134784 Agnoprotein Proteins 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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Abstract
The invention discloses a preparation method of an NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor, which comprises the steps of firstly preparing a nitrogen-boron doped graphene aerogel electrode and an RGO/PPy/Ag silver doped polypyrrole graphene aerogel electrode material, pressing the two electrodes onto a nickel sheet, coating KOH/PVA gel electrolyte on the surface of a positive electrode material and a negative electrode material of the nickel sheet, facing the surface of the positive electrode material and the surface of the negative electrode material of the nickel sheet, pressing and drying at room temperature to complete the assembly of an all-solid asymmetric super capacitor; the preparation method has the advantages of simple and efficient process, good reproducibility and large-scale preparation, and the prepared device has the characteristics of large power density, wide working voltage window, rapid charge and discharge and the like. The sensor module is combined with the field of piezoelectric sensors, so that the application field of the super capacitor is widened, and the resistance of the sensor module in a complex environment is optimized.
Description
Technical Field
The invention belongs to the field of super-capacitor-based new material energy storage, and provides an NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor.
Background
As the design combining the field of the super capacitor and the field of the piezoelectric sensor, the high power density and the strong environment adaptability of the super capacitor for quick charge and discharge are inherited, meanwhile, the elastic aerogel electrode also has the characteristics of light weight, small area, implantation, stress bearing capability, certain recovery capability and the like, the design idea of the piezoelectric sensor is combined, and the piezoelectric sensor integrated module based on the super capacitor is designed on the basis of the design idea of the piezoelectric sensor.
The super capacitor is applied to the sensor module, the power supply of the whole sensor system is guaranteed by taking the super capacitor as a power supply, the elastic electrode is prepared, the stress changing outside can be responded, the change of the electrochemical performance of the super capacitor can be reflected in the circuit module, the electrode is prepared based on a freeze drying process, meanwhile, the electrode polymerized with the polypyrrole material has hydrophilicity, and is not easily influenced by factors such as temperature difference, external liquid mixing and physical deformation brought by a practical application scene, and the design can be completely applied to stress detection of human textiles or a severe natural environment.
In order to improve the energy density of the super capacitor, the preparation of the asymmetric super capacitor is one of the safest and effective ways for improving the energy density. The asymmetric super capacitor is used for increasing the working voltage by assembling two electrodes with different potential windows. Two electrodes with different voltage windows are needed for preparing the asymmetric super capacitor, and a positive electrode material with relatively positive potential and a negative electrode material with relatively negative potential are used as the positive electrode material and the negative electrode material.
The NBGA// RGO/PPy/Ag asymmetric elastic supercapacitor is an asymmetric all-solid-state elastic supercapacitor assembled by taking a nitrogen-boron doped graphene NBGA material as a positive electrode and a silver doped polypyrrole graphene oxide RGO/PPy/Ag material as a negative electrode. Wherein the nitrogen-boron-doped graphene NBGA is an aerogel material formed by mixing, carrying out a hydrothermal reaction on graphene oxide, ammonia water and boric acid, and carrying out freeze drying, and the silver-doped polypyrrole graphene oxide (RGO/PPy/Ag) is graphene oxide, polypyrrole and silver nitrate solution (AgNO)3) AAnd (3) carrying out hydrothermal reaction and freeze-drying the formed aerogel material. The two aerogel materials are prepared by a high-temperature high-pressure hydrothermal reaction and a freeze drying process, the preparation process is simple, the good electrochemical performance is achieved, the stress electrochemical performance is changed along with the change of the high-temperature high-pressure hydrothermal reaction and the freeze drying process, and the aerogel materials are suitable for being assembled into a super capacitor to serve as a power supply to be applied to a piezoelectric sensor module.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of an NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor, which is applied to a piezoelectric sensor module to research the relationship between the electrochemical performance of a super-capacitor and the circuit parameters of the sensor under external stress.
The preparation method of the NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor comprises the following steps:
the method comprises the following steps: preparation of nitrogen-boron doped graphene aerogel electrode
(1) Mixing a 2mg/ml boric acid solution, a 5mg/ml graphene oxide solution and a 28% ammonia water solution according to a volume ratio of 3-18:600:10, and carrying out ultrasonic treatment on the mixed solution for 60-90 minutes to ensure that the mixed solution is uniformly distributed;
(2) placing the mixed solution in a high-pressure reaction kettle at the temperature of 120-140 ℃ for hydrothermal reaction for 12-14h, and standing at room temperature after the reaction is finished to form hydrogel;
(3) taking out the hydrogel in the reaction kettle, dialyzing for 6h in a solvent, washing off redundant dialysate, putting into an environment at the temperature of 18 ℃ below zero for 48h for freeze drying, taking out a sample, and naturally drying to form NBGA, wherein the NBGA represents nitrogen-boron doped graphene aerogel;
step two: preparation of RGO/PPy/Ag silver-doped polypyrrole graphene aerogel electrode material
(1) 3mg/ml graphene oxide solution and 1mg/ml AgNO3The volume ratio of the solution to 10mg/ml PPy ethanol solution is 40:5-15:1, and the mixed solution is subjected to ultrasonic treatment for 60 minutes to be uniformly distributed
(2) Placing the mixed solution in a high-pressure reaction kettle at 120 ℃ for 14h for hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel
(3) Taking out the hydrogel in the reaction kettle, dialyzing for 6h in a solvent, washing off redundant dialysate, putting the dialysate into an environment at the temperature of 18 ℃ below zero for 48h, freeze-drying, taking out a sample, and naturally drying to form RGO/PPy/Ag, wherein the RGO/PPy/Ag is used as a negative electrode material;
step three: assembly of all-solid-state asymmetric super-capacitor type piezoelectric sensor
(1) Cutting the positive and negative electrode materials into slices with a certain area, taking two nickel sheets with the area of 2x2cm, respectively pressing the positive and negative electrode materials on the nickel sheets by a tablet press under the pressure of 10Mpa, and soaking the pressed nickel sheets in 6mol/L KOH for 6 hours;
(2) and preparing a KOH/PVA gel electrolyte, coating a proper amount of the KOH/PVA gel electrolyte on a nickel sheet with positive and negative electrode material surfaces, enabling the positive and negative electrode material surfaces of the nickel sheet to be opposite, pressing and drying at room temperature to finish the assembly of the all-solid-state asymmetric supercapacitor.
(3) And charging the assembled device at 1.6V for 10 minutes, directly connecting the device with a micro-current sensor, and applying stress (0.1N-10N) in a certain range to the super capacitor through a pressure gauge to measure corresponding response current.
Preferably, the ultrasonic treatment time of the mixed solution in the step one- (1) is 60 minutes.
Preferably, the solvent in the step one- (3) is water: ethanol is 100: 1.
The invention has the beneficial effects that: the preparation process is simple and efficient, the reproducibility is good, the scale preparation can be realized, and the prepared device has the characteristics of large power density, wide working voltage window, rapid charge and discharge and the like. The sensor module is combined with the field of piezoelectric sensors, so that the application field of the super capacitor is widened, and the resistance of the sensor module in a complex environment is optimized.
Drawings
FIG. 1: NBGA// RGO/PPy/Ag asymmetric elastic super capacitor type piezoelectric sensor schematic diagram.
Detailed Description
For a better understanding of the present invention, reference will now be made to the following examples which are set forth to illustrate, but are not to be construed to limit the present invention.
As shown in FIG. 1, the test of the NBGA// RGO/PPy/Ag asymmetric elastic super capacitor type piezoelectric sensor comprises two steps, wherein the first step is to charge the NBGA// RGO/PPy/Ag device under the voltage of 1.6V provided by the constant voltage power supply 1 for ten minutes, 3456 are the current collector nickel plate, the anode material RGO/PPy/Ag, the gel electrolyte PVA-KOH and the cathode material NBGA which form the super capacitor, and the two symmetrical pressure gauges do not provide pressure. The second step is to determine the stress-current relationship by means of the micro-current sensor 7 under different stresses of 0.1N to 10N applied to the charged device by means of two identical pressure gauges 2.
The first embodiment is as follows: mixing a 2mg/ml boric acid solution, a 5mg/ml graphene oxide solution and a 28% ammonia water solution according to a volume ratio of 3:600:10, and carrying out ultrasonic treatment on the mixed solution for 60 minutes to ensure that the mixed solution is uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 120 ℃ for 14h for hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h in 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h for freeze drying, taking out a sample, and naturally drying to form aerogel NBGA.
3mg/ml graphene oxide solution and 1mg/ml AgNO3The solution and 10mg/ml PPy ethanol solution are mixed according to the volume ratio of 40:5:1, and the mixed solution is subjected to ultrasonic treatment for 60 minutes to be uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 120 ℃ for 14h for hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h under 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h, freeze-drying, taking out a sample, and naturally drying to form aerogel RGO/PPy/Ag.
Assembling the all-solid-state asymmetric supercapacitor:
(1) cutting the two electrode materials into slices with a certain area, taking two nickel sheets with the area of 2x2cm, respectively pressing the electrode materials on the nickel sheets by a tablet machine under the pressure of 10Mpa for 2min, and soaking the pressed nickel sheets in 6M KOH for 6h
(2) Preparing KOH/PVA gel electrolyte, coating a proper amount of the KOH/PVA gel electrolyte on the same surface of a nickel sheet electrode, lightly pressing and drying at room temperature to finish the assembly of the all-solid-state asymmetric supercapacitor
(3) And charging the assembled device at 1.6V for 10 minutes, directly connecting the device with a micro-current sensor, and applying stress (0.1N-10N) in a certain range to the super capacitor through a pressure gauge to measure corresponding response current.
The second embodiment is as follows: mixing a 2mg/ml boric acid solution, a 5mg/ml graphene oxide solution and a 28% ammonia water solution according to a volume ratio of 12:600:10, and carrying out ultrasonic treatment on the mixed solution for 80 minutes to ensure that the mixed solution is uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 130 ℃ for 13h for hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h in 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h for freeze drying, taking out a sample, and naturally drying to form aerogel NBGA.
3mg/ml graphene oxide solution and 1mg/ml AgNO3The solution and 10mg/ml PPy ethanol solution are mixed according to the volume ratio of 40:10:1, and the mixed solution is subjected to ultrasonic treatment for 80 minutes to be uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 130 ℃ for 13h for hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h under 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h, freeze-drying, taking out a sample, and naturally drying to form aerogel RGO/PPy/Ag.
Assembling the all-solid-state asymmetric supercapacitor:
(1) cutting the two electrode materials into slices with a certain area, taking two nickel sheets with the area of 2x2cm, respectively pressing the electrode materials on the nickel sheets by a tablet machine under the pressure of 10Mpa for 2min, and soaking the pressed nickel sheets in 6M KOH for 6h
(2) Preparing KOH/PVA gel electrolyte, coating a proper amount of the KOH/PVA gel electrolyte on the same surface of a nickel sheet electrode, lightly pressing and drying at room temperature to finish the assembly of the all-solid-state asymmetric supercapacitor
(3) And charging the assembled device at 1.6V for 10 minutes, directly connecting the device with a micro-current sensor, and applying stress (0.1N-10N) in a certain range to the super capacitor through a pressure gauge to measure corresponding response current.
The third concrete implementation mode: mixing a 2mg/ml boric acid solution, a 5mg/ml graphene oxide solution and a 28% ammonia water solution according to a volume ratio of 18:600:10, and carrying out ultrasonic treatment on the mixed solution for 90 minutes to ensure that the mixed solution is uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 140 ℃ for 12h to perform hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h in 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h for freeze drying, taking out a sample, and naturally drying to form aerogel NBGA.
3mg/ml graphene oxide solution and 1mg/ml AgNO3The solution and 10mg/ml PPy ethanol solution are mixed according to the volume ratio of 40:15:1, and the mixed solution is subjected to ultrasonic treatment for 90 minutes to be uniformly distributed. And (3) placing the mixed solution in a 25ml high-pressure reaction kettle at 140 ℃ for 12h to perform hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel. Taking out the hydrogel in the reaction kettle, dialyzing for 6h under 100ml of solvent (water: ethanol is 100:1), washing off redundant dialysate, putting into an environment at 18 ℃ below zero for 48h, freeze-drying, taking out a sample, and naturally drying to form aerogel RGO/PPy/Ag.
Assembling the all-solid-state asymmetric supercapacitor:
(1) cutting the two electrode materials into slices with a certain area, taking two nickel sheets with the area of 2x2cm, respectively pressing the electrode materials on the nickel sheets by a tablet machine under the pressure of 10Mpa for 2min, and soaking the pressed nickel sheets in 6M KOH for 6h
(2) Preparing KOH/PVA gel electrolyte, coating a proper amount of the KOH/PVA gel electrolyte on the same surface of a nickel sheet electrode, lightly pressing and drying at room temperature to finish the assembly of the all-solid-state asymmetric supercapacitor
(3) And charging the assembled device at 1.6V for 10 minutes, directly connecting the device with a micro-current sensor, and applying stress (0.1N-10N) in a certain range to the super capacitor through a pressure gauge to measure corresponding response current.
Claims (3)
- The preparation method of the NBGA// RGO/PPy/Ag asymmetric elastic super-capacitor type piezoelectric sensor comprises the following steps:the method comprises the following steps: preparation of nitrogen-boron doped graphene aerogel electrode(1) Mixing a 2mg/ml boric acid solution, a 5mg/ml graphene oxide solution and a 28% ammonia water solution according to a volume ratio of 3-18:600:10, and carrying out ultrasonic treatment on the mixed solution for 60-90 minutes to ensure that the mixed solution is uniformly distributed;(2) placing the mixed solution in a high-pressure reaction kettle at the temperature of 120-140 ℃ for hydrothermal reaction for 12-14h, and standing at room temperature after the reaction is finished to form hydrogel;(3) taking out the hydrogel in the reaction kettle, dialyzing for 6h in a solvent, washing off redundant dialysate, putting into an environment at the temperature of 18 ℃ below zero for 48h for freeze drying, taking out a sample, and naturally drying to form NBGA, wherein the NBGA represents nitrogen-boron doped graphene aerogel;step two: preparation of RGO/PPy/Ag silver-doped polypyrrole graphene aerogel electrode material(1) 3mg/ml graphene oxide solution and 1mg/ml AgNO3The volume ratio of the solution to 10mg/ml PPy ethanol solution is 40:5-15:1, and the mixed solution is subjected to ultrasonic treatment for 60-90 minutes to be uniformly distributed(2) Placing the mixed solution in a high-pressure reaction kettle at the temperature of 120-140 ℃ for 12-14h to carry out hydrothermal reaction, and standing at room temperature after the reaction is finished to form hydrogel(3) Taking out the hydrogel in the reaction kettle, dialyzing for 6h in a solvent, washing off redundant dialysate, putting the dialysate into an environment at the temperature of 18 ℃ below zero for 48h, freeze-drying, taking out a sample, and naturally drying to form RGO/PPy/Ag, wherein the RGO/PPy/Ag is used as a negative electrode material;step three: assembly of all-solid-state asymmetric super-capacitor type piezoelectric sensor(1) Cutting the positive and negative electrode materials into slices with a certain area, taking two nickel sheets with the area of 2x2cm, respectively pressing the positive and negative electrode materials on the nickel sheets by a tablet press under the pressure of 10Mpa, and soaking the pressed nickel sheets in 6mol/L KOH for 6 hours;(2) and preparing a KOH/PVA gel electrolyte, coating a proper amount of the KOH/PVA gel electrolyte on a nickel sheet with positive and negative electrode material surfaces, enabling the positive and negative electrode material surfaces of the nickel sheet to be opposite, pressing and drying at room temperature to finish the assembly of the all-solid-state asymmetric supercapacitor.
- 2. The method for preparing NBGA// RGO/PPy/Ag asymmetric elastic super capacitor type piezoelectric sensor of claim 1, wherein: and (3) carrying out ultrasonic treatment on the mixed solution in the step one- (1) for 60 minutes.
- 3. The method for preparing NBGA// RGO/PPy/Ag asymmetric elastic super capacitor type piezoelectric sensor of claim 1, wherein: the solvent in the step one- (3) is water: ethanol is 100: 1.
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| CN113441094A (en) * | 2021-05-21 | 2021-09-28 | 安徽大学 | Boron-graphene composite aerogel, preparation and application thereof |
| CN114262464A (en) * | 2021-12-22 | 2022-04-01 | 西南大学 | Preparation method and application of bio-based aerogel piezoelectric sensing device |
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