CN111640587A - Non-polar voltage-regulating high-capacity electrolytic capacitor and preparation method thereof - Google Patents
Non-polar voltage-regulating high-capacity electrolytic capacitor and preparation method thereof Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000003792 electrolyte Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 21
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 17
- 239000004917 carbon fiber Substances 0.000 claims abstract description 17
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 14
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920000767 polyaniline Polymers 0.000 claims abstract description 9
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 9
- 229920000123 polythiophene Polymers 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 6
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 6
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 6
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 238000000151 deposition Methods 0.000 claims description 15
- 230000008021 deposition Effects 0.000 claims description 15
- 238000004070 electrodeposition Methods 0.000 claims description 11
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 10
- 239000005011 phenolic resin Substances 0.000 claims description 10
- 229920001568 phenolic resin Polymers 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- YUKQRDCYNOVPGJ-UHFFFAOYSA-N thioacetamide Chemical compound CC(N)=S YUKQRDCYNOVPGJ-UHFFFAOYSA-N 0.000 claims description 6
- DLFVBJFMPXGRIB-UHFFFAOYSA-N thioacetamide Natural products CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 6
- 230000001476 alcoholic effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000000462 isostatic pressing Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000002052 molecular layer Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000007639 printing Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000010408 film Substances 0.000 abstract description 12
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 2
- 229910019626 (NH4)6Mo7O24 Inorganic materials 0.000 description 4
- 229910052961 molybdenite Inorganic materials 0.000 description 4
- QPVSSARHYZXAPM-UHFFFAOYSA-N 2-amino-2-oxoethanesulfonic acid Chemical compound NC(=O)CS(O)(=O)=O QPVSSARHYZXAPM-UHFFFAOYSA-N 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 2
- 239000002001 electrolyte material Substances 0.000 description 2
- 239000002135 nanosheet Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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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
- H01G11/66—Current collectors
- H01G11/68—Current collectors characterised by their material
-
- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
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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
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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
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
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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
- H01G11/66—Current collectors
- H01G11/70—Current collectors characterised by their structure
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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
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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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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
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Abstract
The invention relates to the technical field of electric storage devices, in particular to a non-polar voltage-regulating high-capacity electrolytic capacitor and a preparation method thereof. The utility model provides a nonpolarity pressure regulating large capacity electrolytic capacitor, electrolytic capacitor includes collecting electrode, polymer conducting film, electrolyte, plastic envelope layer, the collecting electrode includes porous carbon material and molybdenum disulfide, molybdenum disulfide grows on carbon cloth surface through the hydrothermal method. The polymer conductive film is formed by polymerizing conductive polymers, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene. The porous carbon material is a sheet structure made of carbon fiber, activated carbon and carbon nanotubes. The porous carbon material effectively improves the contact area between the electrode and the electrolyte, and the molybdenum disulfide and the conductive polymer perform double-layer conduction, so that the conductivity and the voltage resistance of the capacitor are greatly improved, and the effective capacity of the capacitor is effectively improved.
Description
Technical Field
The invention relates to the technical field of electric storage devices, in particular to a non-polar voltage-regulating high-capacity electrolytic capacitor and a preparation method thereof.
Background
The super capacitor is mainly formed by four parts, namely a packaging material, a diaphragm, electrolyte and positive and negative working electrodes, wherein the packaging material is generally a hard metal shell or an aluminum-plastic packaging film, and plays roles in sealing devices, reducing external influence and protecting safety. The separator functions to prevent contact short-circuiting of the working electrode, and is required to have excellent mechanical stability and chemical stability, as well as high ionic conductivity.
The electrolyte material determines the voltage window and the internal resistance of the super capacitor, and directly influences the energy density and the power density of the device. At present, the electrolyte materials mainly used include aqueous electrolytes, organic electrolytes, and ionic electrolytes. The water system electrolyte is the electrolyte which is applied earliest and most widely, has the advantages of high conductivity, low internal resistance and good electrode material wettability, but the requirements of acidic or alkaline aqueous solution on the corrosion resistance and safety of devices are higher. Due to the limitation of theoretical decomposition voltage of water, the voltage window of the water system electrolyte device is smaller than 1.2V, and the energy density of the device is not favorably improved. Although the wide voltage range of organic and ionic electrolytes can bring the energy density of the devices to the standard of commercial use, the high cost and safety of use remain serious challenges for their practical application.
Disclosure of Invention
The invention aims to provide a non-polar voltage-regulating high-capacity electrolytic capacitor and a preparation method thereof, which aim to solve the problems in the background technology.
The utility model provides a nonpolarity pressure regulating large capacity electrolytic capacitor, electrolytic capacitor includes collecting electrode, polymer conducting film, electrolyte, plastic envelope layer, the collecting electrode includes porous carbon material and molybdenum disulfide, molybdenum disulfide grows on carbon cloth surface through the hydrothermal method.
Preferably, the polymer conductive film is formed by polymerizing a conductive polymer, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene.
Preferably, the porous carbon material is a sheet structure made of carbon fiber, activated carbon and carbon nanotubes.
A preparation method of a non-polar voltage-regulating large-capacity electrolytic capacitor comprises the following steps:
step 1: placing a porous carbon material in an alcohol solution of phenolic resin, and pressing into a sheet structure by an isostatic pressing process;
step 2: preparing a collector, taking thioacetamide and (NH4)6Mo7O24·4H2Dissolving O powder in deionized water, stirring for 20-40min by a magnetic stirrer until the solution is clarified, placing the porous carbon fiber sheet structure prepared in the step 1 in the solution, heating in water bath, and taking out to enable MoS to grow on the surface of the porous carbon fiber sheet structure2Repeatedly washing the nano layer with deionized water for 2-3 times, and vacuum drying at low temperature;
and step 3: coating a membrane, namely covering a high-molecular conductive membrane on the surface of a collector by an electrochemical deposition method, wherein a reaction solution in an electrochemical workstation is a mixed solution of sulfuric acid and at least one of polyaniline, polypyrrole, polythiophene and polyterestyrene, and SCE is used as a reference electrode to prepare an electrode plate after deposition is finished, and cleaning the electrode plate by using an ethanol solution to remove surface impurities;
and 4, step 4: placing the electrode plates prepared in the step 3 into PVA/LiCl electrolyte gel for soaking for 2-3h, taking out the electrode plates, mutually attaching the two electrode plates, and filling a proper amount of PVA/LiCl electrolyte into gaps of the electrode plates to prepare a capacitor prototype;
and 5: taking a capacitor prototype, uniformly dividing the capacitor prototype into capacitor pieces with equal areas through laser, welding corresponding pins on the capacitor pieces, plastically packaging the capacitor through heat molding, and jet-printing corresponding codes to obtain the nonpolar voltage-regulating large-capacity electrolytic capacitor.
Preferably, the concentration of the phenolic resin alcoholic solution in the step 1 is 10-20%.
Preferably, thioacetamide and (NH4) in the step 26Mo7O24·4H2The mass fraction ratio of the O powder is 3-7%: 5 to 12 percent.
Preferably, the heating temperature of the water bath in the step 2 is 190-210 ℃, and the water bath time is 10-14 h.
Preferably, in the step 3, during the electrochemical deposition, the deposition current density in the electrochemical workstation is 0.8mA cm < -2 >, and the deposition time is 3-5 h.
Preferably, the thickness of the nonpolar voltage-regulating large-capacity electrolytic capacitor is 0.8-1.2 mm.
Compared with the prior art, the invention has the beneficial effects that: the porous carbon material is adopted as a base material, the structure is compact and porous, the contact surface between an electrode and electrolyte can be effectively improved, and MoS is attached to the surface of the carbon material2，And MoS2The nano structure is a two-dimensional sheet structure, the conductivity of the electrode is greatly improved, a polymer conductive polymer film is formed on the surface of the collector through electrochemical deposition, and the polymer conductive polymer film is like MoS grown on carbon cloth through a net2The nanosheets are firmly wrapped, and the conductive polymer coated on the nanosheets bears part of stress generated in the charging and discharging process, so that the structural stability of the electrode material is maintained. In addition, MoS2The generated charges can be directly transferred by the conductive polymer in a free and rapid mode. Therefore, the carbon material and the active material MoS2Under the synergistic action of the conductive polymer and the conductive polymer, the conductive polymer/MoS2The electrochemical performance of the/carbon composite material is greatly improved.
Detailed Description
The invention discloses a non-polar voltage-regulating high-capacity electrolytic capacitor and a preparation method thereof, and the invention is further detailed by specific embodiments.
Example 1
The utility model provides a nonpolarity pressure regulating large capacity electrolytic capacitor, electrolytic capacitor includes the collecting electrode, the polymer conducting film, electrolyte, the plastic envelope layer, and the collecting electrode includes porous carbon material and molybdenum disulfide, and molybdenum disulfide grows on carbon cloth surface through the hydrothermal method.
The polymer conductive film is formed by polymerizing conductive polymers, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene, and the porous carbon material is specifically a sheet structure made of carbon fibers, activated carbon and carbon nanotubes.
A preparation method of a non-polar voltage-regulating large-capacity electrolytic capacitor comprises the following steps:
step 1: placing a porous carbon material in an alcohol solution of phenolic resin, and pressing into a sheet structure by an isostatic pressing process;
step 2: preparing a collector, taking thioacetamide and (NH4)6Mo7O24·4H2Dissolving O powder in deionized water, stirring for 30min by a magnetic stirrer until the solution is clarified, placing the porous carbon fiber sheet structure prepared in the step 1 in the solution, heating in water bath, and taking out to allow MoS to grow on the surface of the porous carbon fiber sheet structure2Repeatedly washing the nano layer with deionized water for 2-3 times, and vacuum drying at low temperature;
and step 3: coating a membrane, namely covering a high-molecular conductive membrane on the surface of a collector by an electrochemical deposition method, wherein a reaction solution in an electrochemical workstation is a mixed solution of polyaniline and sulfuric acid, SCE is used as a reference electrode, preparing an electrode plate after deposition is finished, and cleaning the electrode plate by using an ethanol solution to remove surface impurities;
and 4, step 4: placing the electrode plates prepared in the step 3 into PVA/LiCl electrolyte gel for soaking for 2-3h, taking out the electrode plates, mutually attaching the two electrode plates, and filling a proper amount of PVA/LiCl electrolyte into gaps of the electrode plates to prepare a capacitor prototype;
and 5: taking a capacitor prototype, uniformly dividing the capacitor prototype into capacitor pieces with equal areas through laser, welding corresponding pins on the capacitor pieces, plastically packaging the capacitor through heat molding, and jet-printing corresponding codes to obtain the nonpolar voltage-regulating large-capacity electrolytic capacitor.
The concentration of the phenolic resin alcoholic solution in the step 1 is 10%.
Sulfoacetamide and (NH4) in step 26Mo7O24·4H2Of O powderThe mass fraction ratio is 5: 10 percent.
The heating temperature of the water bath in the step 2 is 190-.
And 3, during electrochemical deposition in the step 3, the deposition current density in the electrochemical workstation is 0.8mA cm < -2 >, and the deposition time is 3-5 h.
The thickness of the non-polar voltage-regulating large-capacity electrolytic capacitor is 0.8-1.2 mm.
Example 2
The utility model provides a nonpolarity pressure regulating large capacity electrolytic capacitor, electrolytic capacitor includes the collecting electrode, the polymer conducting film, electrolyte, the plastic envelope layer, and the collecting electrode includes porous carbon material and molybdenum disulfide, and molybdenum disulfide grows on carbon cloth surface through the hydrothermal method.
The polymer conductive film is formed by polymerizing conductive polymers, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene.
The porous carbon material is sheet structure made of carbon fiber, active carbon and carbon nanotube.
A preparation method of a non-polar voltage-regulating large-capacity electrolytic capacitor comprises the following steps:
step 1: placing a porous carbon material in an alcohol solution of phenolic resin, and pressing into a sheet structure by an isostatic pressing process;
step 2: preparing a collector, taking thioacetamide and (NH4)6Mo7O24·4H2Dissolving O powder in deionized water, stirring for 30min by a magnetic stirrer until the solution is clarified, placing the porous carbon fiber sheet structure prepared in the step 1 in the solution, heating in water bath, and taking out to allow MoS to grow on the surface of the porous carbon fiber sheet structure2Repeatedly washing the nano layer with deionized water for 2-3 times, and vacuum drying at low temperature;
and step 3: coating a membrane, namely covering a high-molecular conductive membrane on the surface of a collector by an electrochemical deposition method, wherein a reaction solution in an electrochemical workstation is a mixed solution of polypyrrole and sulfuric acid, SCE is used as a reference electrode, preparing an electrode plate after deposition is finished, and cleaning the electrode plate by using an ethanol solution to remove surface impurities;
and 4, step 4: placing the electrode plates prepared in the step 3 into PVA/LiCl electrolyte gel for soaking for 2-3h, taking out the electrode plates, mutually attaching the two electrode plates, and filling a proper amount of PVA/LiCl electrolyte into gaps of the electrode plates to prepare a capacitor prototype;
and 5: taking a capacitor prototype, uniformly dividing the capacitor prototype into capacitor pieces with equal areas through laser, welding corresponding pins on the capacitor pieces, plastically packaging the capacitor through heat molding, and jet-printing corresponding codes to obtain the nonpolar voltage-regulating large-capacity electrolytic capacitor.
The concentration of the phenolic resin alcoholic solution in the step 1 is 10%.
Sulfoacetamide and (NH4) in step 26Mo7O24·4H2The mass fraction ratio of the O powder is 7%: 12 percent.
The heating temperature of the water bath in the step 2 is 190-.
And 3, during electrochemical deposition in the step 3, the deposition current density in the electrochemical workstation is 0.8mA cm < -2 >, and the deposition time is 3-5 h.
The thickness of the non-polar voltage-regulating large-capacity electrolytic capacitor is 0.8-1.2 mm.
Example 3
The utility model provides a nonpolarity pressure regulating large capacity electrolytic capacitor, electrolytic capacitor includes the collecting electrode, the polymer conducting film, electrolyte, the plastic envelope layer, and the collecting electrode includes porous carbon material and molybdenum disulfide, and molybdenum disulfide grows on carbon cloth surface through the hydrothermal method.
The polymer conductive film is formed by polymerizing conductive polymers, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene.
The porous carbon material is sheet structure made of carbon fiber, active carbon and carbon nanotube.
A preparation method of a non-polar voltage-regulating large-capacity electrolytic capacitor comprises the following steps:
step 1: placing a porous carbon material in an alcohol solution of phenolic resin, and pressing into a sheet structure by an isostatic pressing process;
step 2: preparing collector and taking sulfurAnd (NH4)6Mo7O24·4H2Dissolving O powder in deionized water, stirring for 30min by a magnetic stirrer until the solution is clarified, placing the porous carbon fiber sheet structure prepared in the step 1 in the solution, heating in water bath, and taking out to allow MoS to grow on the surface of the porous carbon fiber sheet structure2Repeatedly washing the nano layer with deionized water for 2-3 times, and vacuum drying at low temperature;
and step 3: coating a membrane, namely covering a high-molecular conductive membrane on the surface of a collector by an electrochemical deposition method, wherein a reaction solution in an electrochemical workstation is a mixed solution of polythiophene and sulfuric acid, SCE is used as a reference electrode, preparing an electrode plate after deposition is finished, and cleaning the electrode plate by using an ethanol solution to remove surface impurities;
and 4, step 4: placing the electrode plates prepared in the step 3 into PVA/LiCl electrolyte gel for soaking for 2-3h, taking out the electrode plates, mutually attaching the two electrode plates, and filling a proper amount of PVA/LiCl electrolyte into gaps of the electrode plates to prepare a capacitor prototype;
and 5: taking a capacitor prototype, uniformly dividing the capacitor prototype into capacitor pieces with equal areas through laser, welding corresponding pins on the capacitor pieces, plastically packaging the capacitor through heat molding, and jet-printing corresponding codes to obtain the nonpolar voltage-regulating large-capacity electrolytic capacitor.
The concentration of the phenolic resin alcoholic solution in the step 1 is 10%.
Sulfoacetamide and (NH4) in step 26Mo7O24·4H2The mass fraction ratio of the O powder is 3%: 5 percent.
The heating temperature of the water bath in the step 2 is 190-.
And 3, during electrochemical deposition in the step 3, the deposition current density in the electrochemical workstation is 0.8mA cm < -2 >, and the deposition time is 3-5 h.
The thickness of the non-polar voltage-regulating large-capacity electrolytic capacitor is 0.8-1.2 mm.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A nonpolarity voltage-regulating large-capacity electrolytic capacitor is characterized in that: the electrolytic capacitor comprises a collector electrode, a high polymer conductive film, electrolyte and a plastic package layer, wherein the collector electrode comprises a porous carbon material and molybdenum disulfide, and the molybdenum disulfide grows on the surface of carbon fiber cloth through a hydrothermal method.
2. The nonpolarity voltage-regulating large-capacity electrolytic capacitor as recited in claim 1, wherein: the polymer conductive film is formed by polymerizing conductive polymers, specifically at least one of polyaniline, polypyrrole, polythiophene and poly-p-styrene.
3. The nonpolarity voltage-regulating large-capacity electrolytic capacitor as recited in claim 1, wherein: the porous carbon material is a sheet structure made of carbon fiber, activated carbon and carbon nanotubes.
4. The method for preparing a nonpolarity voltage-regulating large-capacity electrolytic capacitor according to claim 1, characterized in that: the method comprises the following steps:
step 1: placing a porous carbon material in an alcohol solution of phenolic resin, and pressing into a sheet structure by an isostatic pressing process;
step 2: preparing a collector, taking thioacetamide and (NH)4)6Mo7O24·4H2Dissolving O powder in deionized water, stirring for 20-40min by a magnetic stirrer until the solution is clarified, placing the porous carbon fiber sheet structure prepared in the step 1 in the solution, heating in water bath, and taking out to enable MoS to grow on the surface of the porous carbon fiber sheet structure2Repeatedly washing the nano layer with deionized water for 2-3 times, and vacuum drying at low temperature;
and step 3: coating a membrane, namely covering a high-molecular conductive membrane on the surface of a collector by an electrochemical deposition method, wherein a reaction solution in an electrochemical workstation is a mixed solution of sulfuric acid and at least one of polyaniline, polypyrrole, polythiophene and polyterestyrene, and SCE is used as a reference electrode to prepare an electrode plate after deposition is finished, and cleaning the electrode plate by using an ethanol solution to remove surface impurities;
and 4, step 4: placing the electrode plates prepared in the step 3 into PVA/LiCl electrolyte gel for soaking for 2-3h, taking out the electrode plates, mutually attaching the two electrode plates, and filling a proper amount of PVA/LiCl electrolyte into gaps of the electrode plates to prepare a capacitor prototype;
and 5: taking a capacitor prototype, uniformly dividing the capacitor prototype into capacitor pieces with equal areas through laser, welding corresponding pins on the capacitor pieces, plastically packaging the capacitor through heat molding, and jet-printing corresponding codes to obtain the nonpolar voltage-regulating large-capacity electrolytic capacitor.
5. The method for preparing a non-polar voltage-regulating large-capacity electrolytic capacitor according to claim 4, characterized in that: in the step 1, the concentration of the phenolic resin alcoholic solution is 10-20%.
6. The method for preparing a non-polar voltage-regulating large-capacity electrolytic capacitor according to claim 4, characterized in that: thioacetamide and (NH) in the step 24)6Mo7O24·4H2The mass fraction ratio of the O powder is 3-7%: 5 to 12 percent.
7. The method for preparing a non-polar voltage-regulating large-capacity electrolytic capacitor according to claim 4, characterized in that: the heating temperature of the water bath in the step 2 is 190-210 ℃, and the water bath time is 10-14 h.
8. The method for preparing a non-polar voltage-regulating large-capacity electrolytic capacitor according to claim 4, characterized in that:in the electrochemical deposition in the step 3, the deposition current density in the electrochemical workstation is 0.8mA cm-2The deposition time is 3-5 h.
9. The method for preparing a non-polar voltage-regulating large-capacity electrolytic capacitor according to claim 4, characterized in that: the thickness of the non-polar voltage-regulating large-capacity electrolytic capacitor is 0.8-1.2 mm.
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