CN110970230A - Hydrogel polymerized in situ on surface of phytic acid/sulfuric acid gel, preparation method thereof and application thereof in flexible supercapacitor - Google Patents
Hydrogel polymerized in situ on surface of phytic acid/sulfuric acid gel, preparation method thereof and application thereof in flexible supercapacitor Download PDFInfo
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 79
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 title claims abstract description 54
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229940068041 phytic acid Drugs 0.000 title claims abstract description 54
- 235000002949 phytic acid Nutrition 0.000 title claims abstract description 54
- 239000000467 phytic acid Substances 0.000 title claims abstract description 54
- 239000000499 gel Substances 0.000 title claims abstract description 47
- 239000000017 hydrogel Substances 0.000 title claims abstract description 44
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229920000767 polyaniline Polymers 0.000 claims abstract description 60
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- 230000035876 healing Effects 0.000 claims abstract description 7
- 239000013543 active substance Substances 0.000 claims abstract description 4
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 98
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 48
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 24
- 230000000379 polymerizing effect Effects 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 claims description 2
- 239000002322 conducting polymer Substances 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000006355 external stress Effects 0.000 abstract description 2
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000000724 energy-dispersive X-ray spectrum Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur 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
- H01G11/54—Electrolytes
- H01G11/56—Solid electrolytes, e.g. gels; Additives therein
-
- 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
- H01G11/48—Conductive polymers
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
The invention provides a polymeric hydrogel formed by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel, a preparation method thereof and application thereof in a flexible supercapacitor, wherein the polymeric hydrogel comprises phytic acid/sulfuric acid gel (PAD/H)2SO4) The gel is used as flexible electrolyte, and electrochemical active substance conductive polymer Polyaniline (PANI) is polymerized to phytic acid/sulfuric acid gel (PAD/H) in situ2SO4) Obtaining polyaniline in situ polymerization hydrogel (PAD/H) on the surface of the gel2SO4-PANI). The flexible super capacitor prepared by the invention can still maintain better electrochemical properties such as energy density and ion transmission when the external stress deforms or damages the flexible super capacitor even after the cutting/healing cycle and the deformation or damage period or the cutting/self-healing cycle.
Description
Technical Field
The invention relates to the technical field of electrochemical energy storage, in particular to a polymeric hydrogel formed by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel, a preparation method thereof and application thereof in a flexible supercapacitor.
Background
In recent years, the explosive development of intelligent electronic devices, particularly wearable and portable devices, has put new demands on energy storage devices. To meet the requirements of flexibility, deformability, safety, etc., more intelligent development such as supercapacitors with self-protection, heat resistance, high voltage window and self-healing against external stimuli has attracted increasing attention.
Because conventional capacitors have hindered the development of next generation portable and wearable electronics, flexible energy storage devices have attracted a great deal of research interest, and researchers have been working on providing devices that are flexible to withstand various strain conditions, large deformations, and even physical damage. Currently, most research is focused on the design and fabrication of flexible supercapacitor electrodes, such as the compounding of capacitive materials with flexible substrates, or the direct fabrication of free-standing carbon films. However, this strategy does not enable light flexible supercapacitors with strong mechanical strength and excellent electrochemical performance, and new ideas and methods are needed.
As another key component in determining the performance of flexible devices, self-healing stretchable electrolytes with high ionic conductivity may provide an ideal solution to these needs.
In addition, the conventional flexible device has a multi-layered laminate structure composed of a gel polymer electrolyte sandwiched between two stacked electrodes. But the performance of this structure is relatively poor due to the large contact resistance at the electrode/electrolyte interface. Are relatively fragile during physical deformation or damage, resulting in reduced durability. Therefore, the multilayer stack structure inevitably brings difficulties to the transport of electrons and ions within the device. Therefore, there is a great need for an efficient and timely self-healing supercapacitor construction for practical flexible devices.
Disclosure of Invention
The invention overcomes the defects in the prior art, and provides a polymeric hydrogel formed by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel, a preparation method thereof and application thereof in a flexible supercapacitor.
The purpose of the invention is realized by the following technical scheme.
A polymerized hydrogel prepared by in-situ polymerizing polyaniline on the surface of phytic acid/sulfuric acid gel (PAD/H)2SO4) As a flexible electrolyte, the electrochemical active substance conducting polymer Polyaniline (PANI) is polymerized to phytic acid/sulfuric acid gel (PAD/H) in situ2SO4) The surface is obtained, namely the polymeric hydrogel (PAD/H) of polyaniline in-situ polymerized on the surface of the phytic acid/sulfuric acid gel2SO4-PANI)。
A method for preparing polymeric hydrogel by in-situ polymerizing polyaniline on the surface of phytic acid/sulfuric acid gel comprises polymerizing phytic acid/sulfuric acid gel (PAD/H)2SO4) Soaking (15mm × 10mm × 2mm) in phytic acid and Aniline (ANI) solution, adding Ammonium Persulfate (APS) into the solution, and maintaining at low temperature for 10-15H to obtain polymeric hydrogel (PAD/H) prepared by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel2SO4-PANI), wherein the concentration of the Aniline (ANI) solution is 0.3-2.5M, and the mass ratio of Aniline (ANI) and phytic acid is (2-5): 1, the amount of Ammonium Persulfate (APS) material is 20-30% of the amount of Aniline (ANI) material.
The concentration of the Aniline (ANI) solution is 0.4-2.0M, and the mass ratio of the Aniline (ANI) to the phytic acid is (3-4): 1, the amount of Ammonium Persulfate (APS) material is 22-25% of the amount of Aniline (ANI) material.
The low temperature is 0-5 ℃, and the reaction time is 10-12 h.
The preparation method of the flexible supercapacitor comprises the step of polymerizing polyaniline in situ on the polymeric hydrogel (PAD/H) on the surface of phytic acid/sulfuric acid gel2SO4-PANI) and drying at 50-80 deg.C for 1-3h, and polymerizing in situ on the surface of phytic acid/sulfuric acid gel along polyaniline with a cutterPolymeric hydrogel of (PAD/H)2SO4-PANI) edges were cut to avoid short-circuiting, trimmed to a size of (8-12) mm x (4-6) mm x (1-3) mm, and the trimmed polyaniline was polymerized in situ in a polymeric hydrogel (PAD/H) on the surface of phytic acid/sulfuric acid gel2SO4PANI) is sandwiched between carbon cloths, and a flexible supercapacitor is obtained.
The drying condition is drying at 60-70 deg.C for 1-2 h.
The invention has the beneficial effects that: the flexible super capacitor prepared by the invention can still maintain better electrochemical properties such as energy density and ion transmission when the external stress deforms or damages the flexible super capacitor even after the cutting/healing cycle and the deformation or damage period or the cutting/self-healing cycle.
Drawings
FIG. 1 is polyaniline in situ polymerization on PAD/H2SO4The principle and the schematic diagram of a flexible supercapacitor are prepared by electrolyte surface and edge cutting;
FIG. 2 is an SEM representation of a polymerized hydrogel prepared in example 1 by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel and a cross-sectional topography of a freeze-dried supercapacitor;
FIG. 3 is an SEM representation of the polyaniline structure of the surface layer of the freeze-dried flexible supercapacitor prepared in example 1;
FIG. 4 is an element distribution diagram of the freeze-dried flexible supercapacitor prepared in example 1 and an EDX spectrum of the freeze-dried flexible supercapacitor;
fig. 5 is a stress-strain curve of the freeze-dried flexible supercapacitor prepared in example 2 after the tenth cut/recovery cycle;
FIG. 6 is a CV curve of the lyophilized flexible supercapacitor prepared in example 2;
FIG. 7 is a constant current charge and discharge (GCD) curve of the lyophilized flexible supercapacitor prepared in example 2;
FIG. 8 is the supercapacitor at 5mA cm after the 10 th cutting/healing cycle of the lyophilized flexible supercapacitor prepared in example 3-2Cycling stability curve at current density.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example 1
Electrode material polyaniline in-situ polymerized hydrogel on surface of phytic acid/sulfuric acid gel
A piece of PAD/H2SO4The hydrogel (15mm × 10mm × 2mm) was immersed in 5mL of a solution of phytic acid and Aniline (ANI) at a concentration of 1M, and the monomer mass ratio of Aniline (ANI) to phytic acid was 4: 1, then 25% Ammonium Persulfate (APS) (mol%, APS/ANI) dissolved in 5mL of deionized water was added to the above solution and held at 4 ℃ for 12 h.
Assembly of flexible supercapacitors
Washing the obtained hydrogel with deionized water, drying at 70 deg.C for 1 hr to obtain stretchable and instantly self-healing super capacitor in full gel state, and cutting along PAD/H2SO4The edges of the PANI were cut to avoid short circuits and the supercapacitor was trimmed to the required dimensions (10mm x 5mm x 2 mm). Polymerizing the trimmed polyaniline in situ on the polymeric hydrogel (PAD/H) on the surface of the phytic acid/sulfuric acid gel2SO4PANI) is sandwiched between carbon cloths, and a flexible supercapacitor is obtained.
FIG. 2 is an SEM representation of the polymerized hydrogel prepared in example 1 and formed by polyaniline in-situ polymerization on the surface of phytic acid/sulfuric acid gel and a cross-sectional topography of a freeze-dried supercapacitor, and b and c are partially enlarged sectional views. As can be seen from the figure, in situ growth is on porous PAD/H2SO4The polyaniline network on top of the electrolyte exhibits a flocculent or cloudy morphology.
FIG. 3 is an SEM representation of the polyaniline structure of the surface layer of the freeze-dried flexible supercapacitor prepared in example 1. The polyaniline structure of the outermost layer is almost flat and rough. The difference in the shape of PANI at different growth sites may be caused by the difference between the electrode material and PAD/H during in situ polymerization2SO4The mixing of the electrolyte materials is relevant.
FIG. 4 is the element distribution diagram of the freeze-dried flexible supercapacitor prepared in example 1 and the freeze-dried flexible supercapacitorEDX spectra of the stage capacitors. The nitrogen elements, mainly originating from the conductive PANI, are concentrated in the outer layer region of the flexible device (fig. 2-4a), while the sulfur elements, originating from the electrolyte, are mainly concentrated inside the supercapacitor (fig. 2-4 b). The carbon element is uniformly distributed in the whole cross section. However, there is no significant separation of the elements distributed inside and outside the device, and the diffusion phenomenon of the elements indicates that there is little significant interface between the electrode and electrolyte sites of the supercapacitor. The formation of this unique structure is mainly attributed to the in-situ polymerization mechanism of polyaniline active electrode materials. In this process, aniline monomer (ANI) can permeate into the electrolyte network, rather than at PAD/H2SO4The surface layer is simply stacked, so that an electrolyte-PANI coexisting composite structure is formed, the special design is favorable for improving the transmission efficiency of electrons and ions, and the phenomena of stripping of electrode active substances or cracking of an electrolyte interface in the physical deformation or damage process are avoided.
Example 2
Electrode material polyaniline in-situ polymerized hydrogel on surface of phytic acid/sulfuric acid gel
A piece of PAD/H2SO4The hydrogel (15mm × 10mm × 2mm) was immersed in 5mL of a phytic acid and Aniline (ANI) solution having a concentration of 1M, and a monomer mass ratio of Aniline (ANI) to phytic acid of 3: 1, 20% Ammonium Persulfate (APS) (mol%, APS/ANI) dissolved in 5mL of deionized water was then added to the above solution and held at 0 ℃ for 10 h.
Assembly of flexible supercapacitors
The hydrogel obtained was first washed with deionized water and dried at 65 ℃ for 2 hours to prepare a stretchable and instantaneously self-healing all-gel supercapacitor using a cutter pair along the PAD/H2SO4The edges of the PANI were cut to avoid short circuits and the supercapacitor was trimmed to the required dimensions (8mm x 4mm x 1 mm). Polymerizing the trimmed polyaniline in situ on the polymeric hydrogel (PAD/H) on the surface of the phytic acid/sulfuric acid gel2SO4PANI) is sandwiched between carbon cloths, and a flexible supercapacitor is obtained.
Fig. 5 is a stress-strain curve of the freeze-dried flexible supercapacitor prepared in example 2 after the tenth cut/recovery cycle. The flexible supercapacitor is capable of undergoing 10-20 cycles of cutting/healing without significant degradation of mechanical properties.
Fig. 7 is a constant current charge and discharge (GCD) curve of the lyophilized flexible supercapacitor prepared in example 2. Realize at 0.5mA cm-2The capacitance of the flexible super capacitor is 400-450mF cm-2。
Example 3
Electrode material polyaniline in-situ polymerized hydrogel on surface of phytic acid/sulfuric acid gel
A piece of PAD/H2SO4The hydrogel (15mm × 10mm × 2mm) was immersed in 5mL of a solution of phytic acid and Aniline (ANI) at a concentration of 1M, in a monomer mass ratio of Aniline (ANI) to phytic acid of 5: 1, 30% Ammonium Persulfate (APS) (mol%, APS/ANI) dissolved in 5mL of deionized water was then added to the above solution and held at 5 ℃ for 15 h.
Assembly of flexible supercapacitors
Washing the obtained hydrogel with deionized water, drying at 60 deg.C for 2 hr to obtain stretchable and instantly self-healing super capacitor in full gel state, and cutting along PAD/H2SO4The edges of the PANI were cut to avoid short circuits and the supercapacitor was trimmed to the required dimensions (12mm x 6mm x 3 mm). Polymerizing the trimmed polyaniline in situ on the polymeric hydrogel (PAD/H) on the surface of the phytic acid/sulfuric acid gel2SO4PANI) is sandwiched between carbon cloths, and a flexible supercapacitor is obtained.
FIG. 8 is the supercapacitor at 5mA cm after the 10 th cutting/healing cycle of the lyophilized flexible supercapacitor prepared in example 3-2Cycling stability curve at current density. After the 10 th healing, the device also exhibited excellent circulatory stability comparable to the original counterpart.
Example 4
Electrode material polyaniline in-situ polymerized hydrogel on surface of phytic acid/sulfuric acid gel
A piece of PAD/H2SO4The hydrogel (15mm × 10mm × 2mm) was immersed in 5mL of a solution of phytic acid and Aniline (ANI) at a concentration of 1M, in a monomer mass ratio of Aniline (ANI) to phytic acid of 2: 1, 22% Ammonium Persulfate (APS) (mol%, APS/ANI) dissolved in 5mL of deionized water was then added to the above solution and held at 3 ℃ for 14 h.
Assembly of flexible supercapacitors
Washing the obtained hydrogel with deionized water, drying at 50 deg.C for 2 hr to obtain stretchable and instantly self-healing super capacitor in full gel state, and cutting along PAD/H2SO4The edges of the PANI were cut to avoid short circuits and the supercapacitor was trimmed to the required dimensions (10mm x 5mm x 2 mm). Polymerizing the trimmed polyaniline in situ on the polymeric hydrogel (PAD/H) on the surface of the phytic acid/sulfuric acid gel2SO4PANI) is sandwiched between carbon cloths, and a flexible supercapacitor is obtained.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The polymeric hydrogel formed by in-situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel is characterized in that: with phytic acid/sulphuric acid gel (PAD/H)2SO4) As a flexible electrolyte, the electrochemical active substance conducting polymer Polyaniline (PANI) is polymerized to phytic acid/sulfuric acid gel (PAD/H) in situ2SO4) The surface is obtained, namely the polymeric hydrogel (PAD/H) of polyaniline in-situ polymerized on the surface of the phytic acid/sulfuric acid gel2SO4-PANI)。
2. A method for preparing the polymeric hydrogel of claim 1 by in situ polymerization of polyaniline on the surface of phytic acid/sulfuric acid gel, characterized in that: a method for preparing polymeric hydrogel by in-situ polymerizing polyaniline on the surface of phytic acid/sulfuric acid gel comprises polymerizing phytic acid/sulfuric acid gel (PAD/H)2SO4) (15 mm. times.10 mm. times.2 mm) was immersed in phytic acid and anilineAdding Ammonium Persulfate (APS) into the solution (ANI), and keeping the solution at low temperature for 10-15H to obtain the polymeric hydrogel (PAD/H) formed by in-situ polymerization of polyaniline on the surface of the phytic acid/sulfuric acid gel2SO4-PANI), wherein the concentration of the Aniline (ANI) solution is 0.3-2.5M, and the mass ratio of Aniline (ANI) and phytic acid is (2-5): 1, the amount of Ammonium Persulfate (APS) material is 20-30% of the amount of Aniline (ANI) material.
3. The method for preparing the polymeric hydrogel on the surface of the phytic acid/sulfuric acid gel by in-situ polymerization of polyaniline according to claim 2, wherein: the concentration of the Aniline (ANI) solution is 0.4-2.0M, and the mass ratio of the Aniline (ANI) to the phytic acid is (3-4): 1.
4. the method for preparing the polymeric hydrogel on the surface of the phytic acid/sulfuric acid gel by in-situ polymerization of polyaniline according to claim 2, wherein: the amount of Ammonium Persulfate (APS) material is 22-25% of the amount of Aniline (ANI) material.
5. The method for preparing the polymeric hydrogel on the surface of the phytic acid/sulfuric acid gel by in-situ polymerization of polyaniline according to claim 2, wherein: the low temperature is 0-5 ℃, and the reaction time is 10-12 h.
6. The use of the polyaniline in situ polymerized hydrogel on the surface of phytic acid/sulfuric acid gel according to claim 1 in flexible supercapacitors.
7. Use according to claim 6, characterized in that: polymeric hydrogel (PAD/H) prepared by in-situ polymerizing polyaniline on surface of phytic acid/sulfuric acid gel2SO4-PANI) and drying at 50-80 deg.C for 1-3H, and polymerizing the polymerized hydrogel (PAD/H) on the surface of phytic acid/sulfuric acid gel in situ along polyaniline with a cutter2SO4-PANI) to avoid short circuits, trimmed to size (8-12) mmx (4-6) mmx (1-3) mm, and sandwiching the free-standing hydrogel between carbon cloths to obtain a flexible supercapacitor.
8. Use according to claim 7, characterized in that: the drying condition is drying at 60-70 deg.C for 1-2 h.
9. Use according to claim 6, characterized in that: the flexible supercapacitor was able to go through 10-20 cycles of cutting/healing without significant degradation of mechanical properties.
10. Use according to claim 6, characterized in that: the flexible super capacitor is 0.5mAcm-2The capacitance is 400-450mFcm-2。
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| CN111825857A (en) * | 2020-06-28 | 2020-10-27 | 闽江学院 | Hydrogel and preparation method and application thereof |
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