CN106517423A - Carbon aerogel electrode dedicated for capacitive deionization device and preparation method thereof - Google Patents
Carbon aerogel electrode dedicated for capacitive deionization device and preparation method thereof Download PDFInfo
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- CN106517423A CN106517423A CN201610783682.7A CN201610783682A CN106517423A CN 106517423 A CN106517423 A CN 106517423A CN 201610783682 A CN201610783682 A CN 201610783682A CN 106517423 A CN106517423 A CN 106517423A
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- carbon aerogels
- capacitive deionization
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- 239000004966 Carbon aerogel Substances 0.000 title claims abstract description 85
- 238000002242 deionisation method Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 22
- -1 fluorine ions Chemical class 0.000 claims abstract description 18
- 239000011148 porous material Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 66
- 229910052799 carbon Inorganic materials 0.000 claims description 49
- 239000004965 Silica aerogel Substances 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 39
- 239000010439 graphite Substances 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 8
- 239000004745 nonwoven fabric Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000004964 aerogel Substances 0.000 abstract description 10
- 239000011230 binding agent Substances 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 150000002500 ions Chemical class 0.000 abstract description 7
- 238000011033 desalting Methods 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 2
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 239000004743 Polypropylene Substances 0.000 description 9
- 229920001155 polypropylene Polymers 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000011780 sodium chloride Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000010612 desalination reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000002328 demineralizing effect Effects 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- FMYKJLXRRQTBOR-BZSNNMDCSA-N acetylleucyl-leucyl-norleucinal Chemical compound CCCC[C@@H](C=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(C)=O FMYKJLXRRQTBOR-BZSNNMDCSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 201000004384 Alopecia Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005115 demineralization Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000024963 hair loss Diseases 0.000 description 1
- 230000003676 hair loss Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 238000000352 supercritical drying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a carbon aerogel electrode for a capacitive deionization device: the electrode is of a laminated sandwich structure; a first separation net layer, a first carbon aerogel layer, a current collector layer, a second carbon aerogel layer and a second separation net layer are laminated from bottom to top successively to form the electrode and are closely stitched into a whole by stitching lines; the first carbon aerogel layer or the second carbon aerogel layer is mainly composed of carbon aerogel particles. A preparation method is also disclosed. The electrode provided by the invention can be assembled in a curly type or plane type way to be made into a CDI module. The aerogel electrode prepared by the method has the advantages of good integrity, high mechanical strength, and strong electrical conductivity, and can be curled. The method has no addition of a binder, and not only avoids the blockage of pores, but also ensures the electrical conductivity, specific capacitance and blocking property of the aerogel. The electrode is used for preparation of the capacitive deionization device which is used for desalting treatment of water, or removal of harmful ions such as heavy metal ions and fluorine ions in water and reduction of hardness.
Description
Technical field
A kind of the present invention relates to capacitive deionization field of waste water treatment, more particularly to capacitive deionization device-specific carbon airsetting
Gel electrode and preparation method thereof.
Background technology：
Also known as Electro Sorb technology (EST), its general principle is managed based on the electric double layer in electrochemistry to capacitive deionization (CDI)
By using the electrochemical properties on charged electrode surface, realizing absorption and removal, decomposition of organic matter of charged particle in water etc.
Purpose.CDI has that operating cost is low, need not add medicine, non-secondary pollution, to entering, water quality requirement is low, operation and maintenance is simple, de-
The advantages of salt rate is adjustable, Water Sproading rate high and equipment life is long.
Carbon aerosol (Carbon Aerogel) is very excellent capacitive deionization (CDI) electrode material of a class performance,
Typically obtained by constant pressure and dry method by resorcinol and formaldehyde.The nineties in 20th century, invented by LLNL laboratories, and by its
Several u s companys are licensed to for CDI applications, the industrialized production for CDI equipment being opened from this and application.
Carbon aerogels are made up of substantial amounts of nano-pore and meso hole, and it has high-specific surface area, controllable hole knot
Structure, good electric conductivity and extensive density range, so as to excellent specific capacitance and electro adsorption capacity.Prior art is disclosed
The preparation method of carbon silica aerogel electrode have：
United States Patent (USP) (US005731360A), carbon-gas gel powder is mixed with a small amount of polymeric binder, Ran Houfang
It is press-formed in entering mould, the electrode of carbon aerogels global shape is obtained.This preparation method is simple to operate, and preparation cost is low
It is honest and clean, but the incorporation of binding agent plugs cell channels, reduces the specific surface area and specific capacitance of electrode.
United States Patent (USP) (US8480930B2) reports a kind of carbon aerogels preparation method, and its method for making its electrode is：Will system
The carbon-gas gel powder for obtaining and 25% perfluorinated sulfonic acid form carbon printing ink in being distributed to isopropanol, then carbon printing ink slurries are coated to collection
On fluid, electrode finished product after being dried, is obtained.This preparation method is mixed with perfluorinated sulfonic acid, also will blocking aeroge duct.
U.S. LLNL laboratories report a kind of preparation method of capacitive deionization silica aerogel electrode：Carbon cloth is impregnated
Resorcinol and formaldehyde, then exchange of solvent is carried out with acetone, gel is obtained, supercritical drying is then carried out, then in blanket of nitrogen
At 1050 DEG C, pyrolysis obtains aeroge thin slice.Thin slice is mixed with graphite film filling epoxy resin again, is made after epoxy resin cure
Into good mechanical property electrode finished product (J.C.Farmer, Journal of Applied Electrochemistry, 26,
P.1007-1018(1996)).This method tedious process, preparation cost are high, and the epoxy resin of incorporation is also by blocking aeroge
Cell channels.
Bohr solid-state physics research institute of Tongji University reports a kind of preparation method of carbon silica aerogel electrode, and gas is obtained first
Gel slice, then thin slice conduction is glued on titanium foil collector (Xue Hui etc., material Leader, 20 (9), P.137-139
(2006)).The production process of this aeroge thin slice is complicated, and yield rate is very low, it is difficult to large-scale application.
With developing rapidly for material science, the ability that the preparation of carbon aerogels has been mass produced, carbon aerogels electricity
Pole electro-adsorption demineralization technique has extremely huge application potential.
Several companies of the U.S. and research unit just attempt to reduce the production cost of carbon aerogels at present, go in the hope of reducing electric capacity
The cost of ion desalinating process.But, carbon aerogels are prepared into the cumbersome of the electrode finished product of monoblock at present, and typically
Need to add adhesive, not only cause being substantially improved for electrode manufacturing cost, and reduce the electro adsorption capacity of aeroge.Cause
And develop the new both cheap good silica aerogel electrode technology of preparing of performance and be particularly important.
The content of the invention
It is an object of the invention to provide a kind of capacitive deionization equipment carbon silica aerogel electrode and preparation method thereof, the method
Without binding agent, the blocking of hole was both avoided, can guarantee that the electric conductivity of aeroge, specific capacitance and blockiness again.
The technical solution used in the present invention is：
A kind of capacitive deionization equipment carbon silica aerogel electrode, the electrode are stacking sandwich structure, from bottom to top successively
Formed by the first filter layer, the first carbon aerogels layer, current collector layers, the second carbon aerogels layer, the second filter layer stackup, described
One nonwoven layer, the first carbon aerogels layer, current collector layers, the second carbon aerogels layer, the sutured line tight suture of the second filter layer
It is integral.
The first filter layer and the second filter layer can be the non-woven fabrics with electrical insulating property, and the material of non-woven fabrics can be with
It is polypropylene, polyethylene or terylene.
The thickness of the first filter layer or the second filter layer is 0.2～0.5mm.
The first carbon aerogels layer or the second carbon aerogels layer are mainly made up of carbon aerogels particle.
10～600 μm of the particle diameter of described carbon aerogels particle.
The thickness of the first carbon aerogels layer or the second carbon aerogels layer carbon aerogels is 0.2～2mm.
Further, the first carbon aerogels layer or the second carbon aerogels layer are made up of carbon aerogels particle or by carbon airsetting
Glue hybrid particles are constituted, and the carbon aerogels hybrid particles are made up of carbon aerogels particle and additive, and the additive is super
Level electric capacity activated carbon, CNT, chopped carbon fiber, one or more in conductive black.
Further, the consumption of the additive for carbon aerogels hybrid particles 0～15%.Therein 0 represents infinitely
Close to 0 but be 0.
Further, the consumption of the super capacitor active carbon for carbon aerogels hybrid particles 0～15%, preferably 1～
15%th, the consumption of the CNT for carbon aerogels hybrid particles 0～5%, preferably 1～5%；The chopped carbon fiber
A diameter of 5～10 μm, length is 1～20mm, and consumption is 0～5%, preferably the 1～5% of carbon aerogels hybrid particles；It is described to lead
The black consumption of electrical carbon for carbon aerogels hybrid particles 0～5%.Therein 0 representative is infinitely close to 0 but is not 0.
Further, the pore diameter of the first filter layer or the second filter layer is less than carbon aerogels particle or carbon aerogels
The particle diameter of hybrid particles.This is to prevent coming off for carbon aerogels particle.
Further, the filter opening of the first filter layer and the second filter layer is a diameter of 5～7 μm.
Described current collector layers be carbon fibre web, carbon cloth, graphite paper, graphite felt, carbon felt, titanium net, stainless (steel) wire or
Nickel screen.Can only be used as negative electrode with electrode obtained in stainless (steel) wire and nickel screen, and Acidic water should be avoided.
Further, the mesh diameter of the carbon fibre web, titanium net, stainless (steel) wire or nickel screen is 0.5～2cm, fiber or gold
The line footpath of category silk is 5～10um
The thickness of the graphite paper is 0.08-1.5mm.
The thickness of carbon fibre web and carbon cloth is 0.08-0.2mm.
The thickness of graphite felt and carbon felt is 0.3～1.6mm.
The thickness of the titanium net, stainless (steel) wire or nickel screen is 0.5～1mm.
The suture be nylon, terylene, polyethylene, polytetrafluoroethylene (PTFE), Kynoar, polyvinyl chloride, polyvinyl alcohol,
Mixing more than one or both of furane resins, preferably polypropylene, polyethylene or polyester thread.
The line footpath of the suture is 0.1～0.3mm.
The mode of the suture is typically sutured with rhombus or square grid form that the length of side is 0.5～2cm.
The current collector layers arrange the lug of one section of projected electrode at edge, connect extraneous wire, the pole by lug
Ear is preferably long strip type.
The present invention also provides the preparation method of the capacitive deionization equipment carbon silica aerogel electrode, and methods described is：
On the first filter layer, adopt duster or particle to spread step machine by carbon aerogels particle or carbon aerogels hybrid particles
Uniformly be sprinkling upon on the first filter layer, the first carbon aerogels layer is obtained, one layer of afflux is covered on the first carbon aerogels layer
Body layer, then spreads step machine with duster or particle again and carbon aerogels particle or carbon aerogels hybrid particles is uniformly sprinkling upon collector
On layer, the second carbon aerogels layer is obtained, then covers the second filter layer；So as to form two-layer filter layer folder two-layer carbon aerogels
Layer, two-layer carbon aerogels layer center presss from both sides 5 layers of sandwich structure of one layer of current collector layers again；Finally again with suture to 5 layers of sandwich knot
Structure is sutured, and forms firm integrative-structure, and the capacitive deionization equipment carbon silica aerogel electrode is obtained.The suture
Mode is typically sutured with rhombus or square grid form that the length of side is 0.5～2cm.
The capacitive deionization equipment carbon silica aerogel electrode that the present invention is provided can be used for as capacitor deionizing instrument electrode
Water demineralizing process, or in water the harmful ion such as heavy metal ion, hardness, fluorine ion removal.
The invention discloses a kind of capacitive deionization equipment carbon silica aerogel electrode, using stacking sandwich structure, can adopt
Rolling or plane formula mode are assembled, and are prepared into CDI modules.The carbon silica aerogel electrode that the present invention is provided has good integrity,
Mechanical strength is big, can be crimped, the strong advantage of electric conductivity.The method had both avoided the blocking of hole without binding agent, and
Can guarantee that the electric conductivity of aeroge, specific capacitance and blockiness.The method preparation cost is cheap, and obtained electrode is flexible electrical
Pole, thus can be made into the electrode of various shapes.This electrode is used for preparing capacitor deionizing instrument, processes for water demineralizing, or
The removal of the harmful ion such as heavy metal ion, hardness, fluorine ion in person's water.
The beneficial effects of the present invention is：
1. the method had both avoided the blocking of hole without binding agent, can guarantee that electric conductivity, the specific capacitance of aeroge again
With it is blockiness.Simultaneously can avoid aging because of binding agent after Long-Time Service, cause disintegration or the hair loss of electrode.
2. the method process is simple, it is easy to mass produce, and preparation cost is cheap.
3. in the method, non-woven fabrics had both played the container effect of aeroge, played insulating effect again, and can filtration fraction
Suspension, it is to avoid cause the blocking in aeroge space.
4. this multilayer sandwiched structure electrode can direct-assembling into capacitor deionizing instrument, without extra arrangement non-woven fabrics
As insulating barrier, without configuration collector.
5. electrode obtained in the method is flexible electrode, can be crimped and cutting, make arbitrary shape.Thus can adopt
Rolling or plane sheet frame mode are assembled, and make the electrode of various shapes.Electrode good integrity, mechanical strength are big, can carry out
Curling, electric conductivity are strong.
Description of the drawings：
The structural representation of Fig. 1 capacitive deionization equipment carbon silica aerogel electrodes.
The sectional view of Fig. 2 capacitive deionization equipment carbon silica aerogel electrodes.
In figure, 1 is the first filter layer；2 is the first carbon aerogels layer；3 is current collector layers；4 is the second carbon aerogels layer；5
For the second filter layer；6 is suture；7 is lug.
Specific embodiment：
Below with specific embodiment being described further to technical scheme, but protection scope of the present invention is not
It is limited to this.
Embodiment 1
The structure chart of capacitive deionization equipment carbon silica aerogel electrode as depicted in figs. 1 and 2, is stacking sandwich structure, from
Successively by the first filter layer 1, the first carbon aerogels layer 2, current collector layers 3, the second carbon aerogels layer 4, the second filter layer 5 on down
It is laminated, first nonwoven layer 1, the first carbon aerogels layer 2, current collector layers 3, the second carbon aerogels layer 4, the second filter
Layer 5 sutured line, 6 tight suture is integral.
The current collector layers 3 arrange the lug of one section of projected electrode at edge, connect extraneous wire, this enforcement by lug
In example, lug is long strip type, long 3cm, wide 1cm.
The thickness of the first filter layer or the second filter layer is 0.2～0.5mm.In the present embodiment, using thickness
The polypropylene non-woven fabric that a diameter of 5 μm of 0.5mm, filter opening does filter layer.
The thickness of the first carbon aerogels layer or the second carbon aerogels layer carbon aerogels is 0.2～2mm.The present embodiment
In, carbon aerogels thickness degree is 0.5mm.
When current collector layers are graphite paper, the thickness of graphite paper is 0.08-1.5mm, and the present embodiment adopts thickness for 0.1mm's
Graphite paper does current collector layers.
The preparation method of the capacitive deionization equipment carbon silica aerogel electrode is as follows：
By carbon aerogels particle successively with 30 mesh and the sieved through sieve of 50 mesh, particle diameter is obtained for 0.3～0.6mm particle diameter distributions
More uniform aerogel particle.It is 6.4um to take 10g particle diameters, and specific surface area is 2000m2The activated carbon of/g, is entered with 60g aeroges
Row mixing, is placed in agitator and is well mixed, and aeroge compound is obtained.With long 40cm, wide 40cm, thickness 0.5mm, filter opening are straight
Footpath is that 5 μm of polypropylene non-woven fabric does filter layer.With long 40cm, wide 40cm, thickness do current collector layers for the graphite paper of 0.1mm,
One angle of graphite paper protrudes above one section of long 3cm, and the graphite paper lug of wide 1cm, in order to connecting wire.
Pad upper first filter layer first down below, then carbon aerogels particle mixture is uniformly sprinkling upon using duster
On first filter layer, aerogel layer thickness 0.5mm toward above aerogel layer covers one layer of collector again afterwards, then spreads again
One layer of aerogel particle compound (thickness 0.5mm), finally covers the second filter layer again, so as to form 5 layers of sandwich structure.Most
Use diameter 0.1mm polypropylene lines afterwards again, the rhombus form with the length of side as 0.5cm sutured to sandwich structure, and by sandwich of layers
Surrounding suture tight again.So as to form firm integrative-structure, silica aerogel electrode is obtained.The quality of monolithic electrode is 114g,
Aerogel-congtg particle mixture 62g.
The capacitive deionization module of silica aerogel electrode composition carries out sodium chloride desalting performance test：Take two panels said method system
The silica aerogel electrode for obtaining, assembling are grown up and the wide capacitive deionization module for being 40cm.Between silica aerogel electrode piece with thickness it is
1mm, mesh separate for the PP nets of 2mm, so as to form the electrode spacing and water flow passage of 1mm.By dc source both positive and negative polarity, use respectively
Wire is connected on the lug of electrode current collecting body.1000mL is prepared, electrical conductivity is 2026us/cm sodium chloride solutions.Desalination is tested
Carried out in the way of loop test, with the electrical conductivity of the thunder magnetic DDSJ-308F conductivity meter monitor in real time aqueous solution.Operating voltage
1.4V, discharge is 100ml/min, 31 DEG C of water temperature.
Through the Electro Sorb desalination processes of 30min, the electrical conductivity of sodium chloride solution is reduced to 1082us/ from 2026us/cm
cm.Power supply is closed afterwards, by the both positive and negative polarity of electrode slice wire short circuit, carries out electrode regeneration.Through the regenerative process of 18min,
The electrical conductivity of solution returns to 2013us/cm.This silica aerogel electrode tablet quality absorption ration is calculated for 4.14mg/g, volume
Absorption ration is 1.34mg/cm3.Therefore, this 5 layers of sandwich structure silica aerogel electrodes have preferable electro adsorption capacity, are suitable as
For the electrode material of capacitive deionization equipment.
Embodiment 2
By carbon aerogels particle successively with 50 mesh and the sieved through sieve of 100 mesh, particle diameter is obtained for 0.15～0.3mm particle diameters point
The more uniform aerogel particle of cloth.It is 5um to take 4g line footpaths, and length is the carbon fiber of 1cm, is mixed with 130g aeroges, is put
It is well mixed in agitator, aerogel particle compound is obtained.With long 40cm, wide 40cm, thickness 0.5mm, filter opening a diameter of 5
μm polypropylene non-woven fabric do filter layer.With long 40cm, wide 40cm, thickness do current collector layers for the carbon cloth of 0.1mm, and carbon is fine
One angle of dimension cloth protrudes above one section of long 3cm, and the fiber cloth lug of wide 1cm, in order to connecting wire.
Pad upper first filter layer first down below, then step machine is spread using particle will be carbon aerogels particle mixture uniform
Be sprinkling upon on the first filter layer, aerogel layer thickness 0.7mm, one layer of current collector layers are covered toward above aerogel layer again afterwards, connect
, finally cover the second filter layer again, it is sandwich so as to form 5 layers
Structure.It is last to use diameter 0.1mm polypropylene lines, the rhombus form with the length of side as 0.5cm to suture sandwich structure again, and will
The surrounding of sandwich of layers sutures tight again.So as to form firm integrative-structure, silica aerogel electrode is obtained.The quality of monolithic electrode is
127g, aerogel-congtg particle 83g.
The capacitive deionization module of silica aerogel electrode composition carries out sodium chloride desalting performance test：Take two panels said method system
The silica aerogel electrode for obtaining, assembling are grown up and the wide capacitive deionization module for being 40cm.Between silica aerogel electrode piece with thickness it is
1mm, mesh separate for the PP nets of 2mm, so as to form the electrode spacing and water flow passage of 1mm.By dc source both positive and negative polarity, use respectively
Wire is connected on the lug of electrode current collecting body.1000mL is prepared, electrical conductivity is 1548us/cm sodium chloride solutions.Desalination is tested
Carried out in the way of loop test, with the electrical conductivity of the thunder magnetic DDSJ-308F conductivity meter monitor in real time aqueous solution.Operating voltage
1.4V, discharge is 100mL/min, 29 DEG C of water temperature.
Through the Electro Sorb desalination processes of 30min, the electrical conductivity of sodium chloride solution is reduced to 682us/ from 1548us/cm
cm.Power supply is closed afterwards, by the both positive and negative polarity of electrode slice wire short circuit, carries out electrode regeneration.Through the regenerative process of 18min,
The electrical conductivity of solution returns to 1541us/cm.This silica aerogel electrode tablet quality absorption ration is calculated for 5.22mg/g, volume
Absorption ration is 1.69mg/cm3.Therefore, this 5 layers of sandwich structure silica aerogel electrodes have preferable electro adsorption capacity, are suitable as
For the electrode material of capacitive deionization equipment.
Claims (10)
1. a kind of capacitive deionization equipment carbon silica aerogel electrode, it is characterised in that the electrode is stacking sandwich structure, under
And on successively by the first filter layer, the first carbon aerogels layer, current collector layers, the second carbon aerogels layer, the second filter layer stackup and
Into first nonwoven layer, the first carbon aerogels layer, current collector layers, the second carbon aerogels layer, the sutured line of the second filter layer
Tight suture is integral；The first carbon aerogels layer or the second carbon aerogels layer are mainly made up of carbon aerogels particle.
2. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that the first filter layer
It is the non-woven fabrics with electrical insulating property with the second filter layer.
3. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that the first carbon airsetting
Glue-line or the second carbon aerogels layer are made up of carbon aerogels particle or are made up of carbon aerogels hybrid particles, and the carbon aerogels are mixed
Close particle to be made up of carbon aerogels particle and additive, the additive is super capacitor active carbon, CNT, the carbon that is chopped is fine
Dimension, one or more in conductive black.
4. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 3, it is characterised in that the use of the additive
Measure 0～15% for carbon aerogels hybrid particles.
5. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that the first filter layer
Or second the pore diameter of filter layer be less than the particle diameter of carbon aerogels particle or carbon aerogels hybrid particles.
6. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that described current collector layers
For carbon fibre web, carbon cloth, graphite paper, graphite felt, carbon felt, titanium net, stainless (steel) wire or nickel screen.
7. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that the suture is Buddhist nun
One or both of dragon, terylene, polyethylene, polytetrafluoroethylene (PTFE), Kynoar, polyvinyl chloride, polyvinyl alcohol, furane resins
Mixing above.
8. capacitive deionization equipment carbon silica aerogel electrode as claimed in claim 1, it is characterised in that the current collector layers exist
Edge arranges the lug of one section of projected electrode, connects extraneous wire by lug.
9. the preparation method of the capacitive deionization equipment carbon silica aerogel electrode as described in one of claim 1～8, its feature exist
In methods described it is：Adopt duster or particle to spread step machine to mix carbon aerogels particle or carbon aerogels on the first filter layer
It is evengranular to be sprinkling upon on the first filter layer, the first carbon aerogels layer is obtained, and one layer is covered on the first carbon aerogels layer
Current collector layers, then spread step machine with duster or particle again and carbon aerogels particle or carbon aerogels hybrid particles are uniformly sprinkling upon collection
On fluid layer, the second carbon aerogels layer is obtained, then covers the second filter layer；So as to form two-layer filter layer folder two-layer carbon gas
Gel layer, two-layer carbon aerogels layer center press from both sides 5 layers of sandwich structure of one layer of current collector layers again；It is last 5 layers to be pressed from both sides with suture again
Core structure is sutured, and forms firm integrative-structure, and the capacitive deionization equipment carbon silica aerogel electrode is obtained.
10. the capacitive deionization equipment carbon silica aerogel electrode as described in one of claim 1～8 is in capacitor deionizing instrument
Application.
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