CN101527204B - Carbon-based supercapacitor based on polyacrylamide gel electrolyte and preparation method thereof - Google Patents

Carbon-based supercapacitor based on polyacrylamide gel electrolyte and preparation method thereof Download PDF

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CN101527204B
CN101527204B CN2009100489619A CN200910048961A CN101527204B CN 101527204 B CN101527204 B CN 101527204B CN 2009100489619 A CN2009100489619 A CN 2009100489619A CN 200910048961 A CN200910048961 A CN 200910048961A CN 101527204 B CN101527204 B CN 101527204B
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polyacrylamide gel
preparation
capacitor
carbon
aperture
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CN101527204A (en
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孙卓
潘丽坤
庞飞燕
张燕萍
林丽锋
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Najing Science & Technology Co., Ltd., Shanghai
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Najing Science & Technology Co Ltd Shanghai
East China Normal University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/36Nanostructures, e.g. nanofibres, nanotubes or fullerenes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54Electrolytes
    • H01G11/56Solid electrolytes, e.g. gels; Additives therein
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66Current collectors
    • H01G11/70Current collectors characterised by their structure
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nanotechnology (AREA)
  • Materials Engineering (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

The invention relates to the super capacitor technical field, in particular to a carbon-based super capacitor based on polyacrylamide gel electrolyte and a preparation method thereof. The carbon-based super capacitor mainly consists of a capacitor shell, and electrodes, diaphragms and electrolyte which are placed in the capacitor shell. The electrodes are carbon nanotube-carbon fiber composite material electrodes, the electrolyte is polyacrylamide gel, and the capacitor shell is made from any one of polyvinyl alcohol, polymethyl methacrylate, polycarbonate, polyvinyl chloride, polyethylene, polypropylene or polystyrene. Compared with the prior art, the electrochemical super capacitor prepared by the method can be rapidly charged and discharged, and has the advantages of wide window voltage range, higher specific capacitance ranging from 20F/g to 50F/g and good electrochemical capacitor properties.

Description

Based on electrolytical carbon back ultracapacitor of polyacrylamide gel and preparation method
[technical field]
The present invention relates to the ultracapacitor technical field, relate in particular to a kind of based on electrolytical carbon back ultracapacitor of polyacrylamide gel and preparation method.
[background technology]
Ultracapacitor has the big and advantage higher than rechargeable battery power density than traditional capacitor power density, but and fast charging and discharging, long service life is a kind of novel, efficient, practical energy storing device, has a wide range of applications.And the key of electric chemical super electric capacity is the selection of electrode and electrolyte.
Gel electrolyte is because the good contact of itself and electrode and do not have advantages such as electrolyte leakage, high-energy-density and become current research focus, and it has overcome for example liquid electrolyte H 2SO 4, contaminated environment strong, easily defective such as gasification and, and quaternary ammonium salt (R at the phenomenon of leakage of storage, transportation and duration of work generation with corrosivity such as KOH 4N +), ClO 4 -Etc. the low weakness of conductivity; All solid state electrolyte and shortcomings such as electrode contact difference and film-forming process complexity have been overcome simultaneously again.
All the time, polyacrylamide gel is widely used in fields such as biology, medical science, it is good that the polyacrylamide gel electrolyte has mechanical strength, flexible, transparent, chemically stable is insensitive to pH and variations in temperature relatively, advantages such as the network configuration pore size is easy to control are suitable for the gel electrolyte of electric chemical super capacitor very much.
Electrode material also is the key factor of ultracapacitor performance, and the domestic and international at present electrode material that uses for example activated carbon has higher internal resistance, need carry out the lifting of conductivity with very complicated technology, and capacity is little; The synthesis technique complexity of carbon aerogels, with high costs; Metal oxide is relatively more expensive, and can pollute, and carbon nano-tube is as a kind of novel nano material, it has good electrical conductivity, big specific area, good chemical inertness, be fit to the hole of electrolyte ion migration (aperture is general>2nm), and mutual winding can form the network configuration of nanoscale, is considered to the especially ideal electrode material of high-capacity super capacitor of ultracapacitor.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, the electric chemical super capacitor that adopts polyacrylamide gel to make as electrode as electrolyte, carbon nano-tube-carbon fiber is in order to carry out the storage of energy.
For achieving the above object, the present invention proposes a kind of preparation method based on the electrolytical carbon back ultracapacitor of polyacrylamide gel, comprises being prepared as follows step: (1) preparation carbon nano-tube-carbon fibre composite electrode; (2) assembling electrode and barrier film: electrode is fixed in the capacitor casing, and in the middle of two electrodes, puts into barrier film, with the capacitor sealing, and at aperture of capacitor casing reservation; (3) vacuumizing and exhausting: carry out vacuumizing and exhausting by aperture; (4) preparation polyacrylamide gel: with acrylamide and crosslinking agent methylene diacrylamide by 16~19: 1 mass ratio adds water and is configured to total concentration at 0.5%~10% polymer monomer solution, add cushioning liquid and initator, inject in the capacitor casing by aperture then, add the accelerator mixing again, rapid polymerization forms polyacrylamide gel under room temperature or illumination condition then; (5) sealing: at last the aperture on the capacitor casing is sealed.
Described cushioning liquid adopts 1 * tbe buffer liquid, by Tris alkali, Na 2EDTA2H 2O, boric acid and aqueous solvent mix.
When chemical polymerization formed the polyacrylamide gel under adopting room temperature, initator adopted concentration at 10% (NH 4) 2S 2O 8Solution; When photopolymerization formed the polyacrylamide gel under adopting illumination condition, initator employing concentration was 4% riboflavin solution;
Described accelerator is N, N, N ', N '-tetramethylethylenediamine.
The present invention compares with prior art, and electric chemical super capacitor energy fast charging and discharging, window voltage wide ranges with this method preparation have the higher specific capacitance of scope at 20F/g~50F/g, and have good electrochemical capacitor performance.
[description of drawings]
Fig. 1 structural representation of the present invention.
Fig. 2 is the shape appearance figure of carbon nano-tube-carbon fibre composite of being adopted in the embodiment of the invention.
Fig. 3 is the cyclic voltammogram of ultracapacitor prepared in the embodiment of the invention.
Fig. 4 is the charging and discharging curve figure of ultracapacitor prepared in the embodiment of the invention.
Carbon nano-tube-carbon fiber the shape appearance figure of Fig. 5 for being adopted in another embodiment of the present invention.
Fig. 6 is the cyclic voltammogram of ultracapacitor prepared in another embodiment of the present invention.
Fig. 7 is the charging and discharging curve figure of ultracapacitor prepared in another embodiment of the present invention.
Referring to accompanying drawing 1,1 is capacitor casing; 2 is carbon nano-tube-carbon fibre composite electrode; 3 is barrier film; 4 is the polyacrylamide gel electrolyte.
[specific embodiment]
Embodiment 1
Preparation carbon nano-tube-carbon fibre composite electrode:, ultrasonicly in acetone and water respectively then respectively carried out preliminary treatment in 10 minutes with the sand papering of nickel sheet; Utilize low pressure chemical vapor deposition equipment carbon nano-tube-carbon fiber film on the nickel sheet then, acetylene and hydrogen flowing quantity are respectively 100sccm and 50sccm, growth temperature is 550 ℃, growth time is 30 minutes, grown the nickel sheet of carbon nano-tube-carbon fiber film as the electrode of ultracapacitor, its shape appearance figure as shown in Figure 2, carbon nano-tube and carbon fiber twine the formation network configuration alternately, density distribution is even, and caliber is about 20-50nm;
The preparation process of polyacrylamide gel preparation of electrolyte and ultracapacitor is as follows:
(1) carbon nano-tube-carbon fiber film electrode 2 is packed in the PVAC polyvinylalcohol capacitor casing 1, put into barrier films 3 in the middle of two electrodes 2, an aperture, vacuumizing and exhausting are only stayed in sealing;
(2) acrylamide and methylene diacrylamide being added water by 19: 1 weight ratio is configured to 10% solution and forms polymer monomer solution;
(3) adding 2.0ml 1 * tbe buffer liquid and 0.2ml concentration again is 10% (NH 4) 2S 2O 8Be that AP mixes;
(4) be injected into above-mentioned mixed solution in the capacitor casing that carbon nano-tube-carbon fiber film electrode is housed by the aperture of reserving on the capacitor casing;
(5) add 0.02ml accelerator N, N, N ', N '-tetramethylethylenediamine, i.e. TEMED by the aperture of reserving again;
(6) behind the mixing, form good, the resilient transparent polyacrylamide gel of mechanical strength after at room temperature polymerization 1-2 minute;
(7) with the aperture sealing of reserving on the capacitor casing.
Referring to accompanying drawing 3, be the cyclic voltammogram of capacitor measured under the voltage range of-0.8-0.8V, it is swept speed and is 0.4V/s, and figure does not have tangible redox peak, illustrates that it has capacitance characteristic preferably.
The charging and discharging curve figure of measured capacitor when adopting the 0.1mA constant current for charging and discharging currents referring to accompanying drawing 4, the behavior that discharges and recharges repetition capable of circulation illustrates that electrode and electrolyte form interface preferably, and capacitance characteristic is preferably arranged, capacitance is 44.7F/g.
Embodiment 2
Preparation carbon nano-tube-carbon fibre composite electrode: after graphite flake difference water, acetone, ethanol wiping, 20 minutes mode of baking is carried out preliminary treatment under 70 ℃ of conditions again, guarantees that water and organic solvent are no longer remaining; Use magnetron sputtering method then behind the Raney nickel of sputter 20nm on the graphite flake, utilize low pressure chemical vapor deposition equipment carbon nano-tube-carbon fiber film on graphite flake again, acetylene and hydrogen flowing quantity are respectively 100sccm and 100sccm during growth, growth temperature is 550 ℃, growth time is 30 minutes, graphite substrate behind carbon nano-tube-carbon fiber is made electrode and is used, its shape appearance figure as shown in Figure 5, carbon nano-tube-carbon fiber twines the formation network configuration alternately, density distribution is even, and caliber is about 40-100nm.
The preparation process of polyacrylamide gel preparation of electrolyte and ultracapacitor is as follows:
(1) carbon nano-tube-carbon fiber positive and negative electrode is packed into polymethyl methacrylate is in the PMMA capacitor casing 1, puts into barrier films 3 in the middle of two electrodes 2, and an aperture, vacuumizing and exhausting are only stayed in sealing;
(2) acrylamide and methylene diacrylamide are added water by 16: 1 weight ratios and be configured to 5% polymer monomer solution;
(3) adding 2.0ml1 * tbe buffer liquid and 1.5ml concentration again mixes at 4% riboflavin solution;
(4) be injected into above-mentioned mixed solution in the capacitor casing 1 that positive and negative electrode is housed by aperture;
(5) add 0.02ml accelerator N by aperture again, N, N ', N '-tetramethylethylenediamine is TEMED;
(6) behind the mixing, place the above-mentioned solution 10cm of distance place's irradiation to begin polymerization after 6-7 minute fluorescent lamp, continue to shine half an hour, form good, resilient, the transparent polyacrylamide gel of mechanical strength;
(7) aperture on the capacitor casing is sealed.
Referring to accompanying drawing 6, be the cyclic voltammogram of capacitor measured capacitor under the scanning voltage scope of-0.8-0.8V, as shown in the figure, to sweep speed and be 0.1V/s, figure does not have tangible redox peak, illustrates that it has capacitance characteristic preferably.
Referring to accompanying drawing 7, the charging and discharging curve figure of measured capacitor when adopting the constant current of 0.5mA for charging and discharging currents, as shown in the figure, the behavior that discharges and recharges repetition capable of circulation, illustrate that electrode and electrolyte form interface preferably, capacitance characteristic is preferably arranged, capacitance is 29.1F/g.

Claims (4)

1. the preparation method based on the electrolytical carbon back ultracapacitor of polyacrylamide gel is characterized in that comprising being prepared as follows step: (1) preparation carbon nano-tube-carbon fibre composite electrode; (2) assembling electrode and barrier film: electrode is fixed in the capacitor casing, and in the middle of two electrodes, puts into barrier film, with the capacitor sealing, and at aperture of capacitor casing reservation; (3) vacuumizing and exhausting: carry out vacuumizing and exhausting by aperture; (4) preparation polyacrylamide gel: with acrylamide and crosslinking agent methylene diacrylamide by 16~19: 1 mass ratio adds water and is configured to total concentration at 0.5%~10% polymer monomer solution, add cushioning liquid and initator, inject in the capacitor casing by aperture then, add the accelerator mixing again, rapid polymerization forms polyacrylamide gel under room temperature or illumination condition then; (5) sealing: at last the aperture on the capacitor casing is sealed.
2. a kind of preparation method based on the electrolytical carbon back ultracapacitor of polyacrylamide gel according to claim 1 is characterized in that: described cushioning liquid adopts 1 * tbe buffer liquid, by Tris alkali, Na 2EDTA2H 2O, boric acid and aqueous solvent mix.
3. a kind of preparation method based on the electrolytical carbon back ultracapacitor of polyacrylamide gel according to claim 1 is characterized in that: when chemical polymerization formed the polyacrylamide gel under adopting room temperature, initator adopted concentration at 10% (NH 4) 2S 2O 8Solution; When photopolymerization formed the polyacrylamide gel under adopting illumination condition, initator employing concentration was 4% riboflavin solution.
4. according to claim 1 a kind of based on the electrolytical carbon back ultracapacitor of polyacrylamide gel preparation method, it is characterized in that: described accelerator is N, N, N ', N '-tetramethylethylenediamine.
CN2009100489619A 2009-04-08 2009-04-08 Carbon-based supercapacitor based on polyacrylamide gel electrolyte and preparation method thereof Active CN101527204B (en)

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CN104916455B (en) * 2014-03-12 2017-12-01 中国科学院大连化学物理研究所 A kind of colloidal electrolyte ultracapacitor using netted barrier film
US9972451B2 (en) * 2015-11-30 2018-05-15 City University Of Hong Kong Polyelectrolyte and a method for manufacturing an energy storage device
CN105931861B (en) * 2016-06-14 2018-04-03 南京工程学院 A kind of preparation method for the electrode of super capacitor for being covered with active electrode film
CN105931858A (en) * 2016-07-15 2016-09-07 武汉工程大学 Agarose/polyaniline compound gel, method for preparing same and application of agarose/polyaniline compound gel
FR3064812B1 (en) * 2017-04-03 2022-06-24 Nawatechnologies METHOD FOR MANUFACTURING ELECTROCHEMICAL CAPACITOR
CN108539330B (en) * 2018-02-06 2020-05-01 宁波大学 All-solid-state zinc-air battery and gel electrolyte thereof
CN109545561B (en) * 2018-12-18 2020-08-25 湖北大学 Photoinitiated irreversible gel electrolyte and preparation method and application thereof
CN110676071A (en) * 2019-09-27 2020-01-10 长春工业大学 Preparation of novel gel electrolyte and application thereof in field of super capacitor
CN110600280B (en) * 2019-10-28 2022-03-08 锦州凯美能源有限公司 Gel electrolyte precursor and application thereof in preparation of supercapacitor
CN110600279B (en) * 2019-10-28 2021-10-12 锦州凯美能源有限公司 Gel electrolyte precursor and application thereof in preparing quasi-solid supercapacitor

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5604660A (en) * 1995-08-10 1997-02-18 Motorola, Inc. Electrochemical cell having solid polymer electrolyte and asymmetric inorganic electrodes
CN1821182A (en) * 2006-01-26 2006-08-23 复旦大学 Method for preparing mesoporous carbon material
CN101221853A (en) * 2007-12-13 2008-07-16 复旦大学 Semi-solid state or full-solid state water system super capacitor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5604660A (en) * 1995-08-10 1997-02-18 Motorola, Inc. Electrochemical cell having solid polymer electrolyte and asymmetric inorganic electrodes
CN1821182A (en) * 2006-01-26 2006-08-23 复旦大学 Method for preparing mesoporous carbon material
CN101221853A (en) * 2007-12-13 2008-07-16 复旦大学 Semi-solid state or full-solid state water system super capacitor

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