CN106517423B - Special carbon aerogel electrode for capacitive deionization equipment and preparation method thereof - Google Patents
Special carbon aerogel electrode for capacitive deionization equipment and preparation method thereof Download PDFInfo
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Images
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
Abstract
The invention discloses a carbon aerogel electrode for capacitive deionization equipment, which comprises the following components: the electrode is of a laminated sandwich structure and is formed by sequentially laminating 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 from bottom to top, and the electrodes are tightly stitched into a whole through a stitching line; the first carbon aerogel layer or the second carbon aerogel layer consists essentially of carbon aerogel particles. Its preparing process is also disclosed. The electrode provided by the invention can be assembled in a roll-type or plane-type mode to prepare the CDI module. The aerogel electrode prepared by the method has the advantages of good integrity, high mechanical strength, crimping capability and high conductivity. The method does not add binder, thereby avoiding the blocking of pores and ensuring the conductivity, specific capacitance and blocking property of the aerogel. The electrode is used for preparing a capacitance deionizing device and is used for desalting water or removing harmful ions such as heavy metal ions, hardness and fluoride ions in water.
Description
Technical Field
The invention relates to the field of capacitive deionization wastewater treatment, in particular to a special carbon aerogel electrode for capacitive deionization equipment and a preparation method thereof.
The background technology is as follows:
the basic principle of the Capacitive Deionization (CDI) is based on the electric double layer theory in electrochemistry, and the electrochemical characteristics of the surface of a charged electrode are utilized to realize the purposes of adsorbing and removing charged particles in water, decomposing organic matters and the like. The CDI has the advantages of low operation cost, no need of adding medicines, no secondary pollution, low requirement on water quality, simple operation and maintenance, adjustable desalination rate, high water recovery rate, long service life of equipment and the like.
Carbon aerosols (Carbon Aerogel) are a very excellent class of Capacitive Deionization (CDI) electrode materials, typically obtained from resorcinol and formaldehyde by an atmospheric drying process. In the 90 s of the 20 th century, the invention by LLNL laboratories and its grant to several united states companies for CDI applications, has since opened up the industrial production and use of CDI equipment.
The carbon aerogel is composed of a large number of nano-pores and meso-pores, and has a high specific surface area, a controllable pore structure, good conductivity and a wide density range, thereby having excellent specific capacitance and electric adsorption performance. The manufacturing method of the carbon aerogel electrode disclosed in the prior art comprises the following steps:
U.S. Pat. No. 5 (US 005731360A) discloses an electrode having the overall shape of a carbon aerogel prepared by mixing a carbon aerogel powder with a small amount of a polymer binder, and then placing the mixture in a mold and press-molding the mixture. The preparation method is simple to operate and low in preparation cost, but the binder is doped to block part of pore channels, so that the specific surface area and specific capacitance of the electrode are reduced.
U.S. patent (US 8480930B 2) reports a method for preparing a carbon aerogel, which comprises the following steps: and dispersing the prepared carbon aerogel powder and 25% of perfluorosulfonic acid into isopropanol to form carbon ink, coating the carbon ink slurry on a current collector, and drying to obtain an electrode finished product. The preparation method is doped with perfluorosulfonic acid, and the aerogel pore canal is blocked.
The LLNL laboratories in the United states report a method for making capacitive deionization aerogel electrodes: soaking carbon fiber cloth in resorcinol and formaldehyde, exchanging solvent with acetone to obtain gel, performing supercritical drying, and pyrolyzing at 1050 deg.C in nitrogen atmosphere to obtain aerogel sheet. The flakes are then mixed with a graphite film filled epoxy resin which cures to form a finished electrode product with good mechanical properties (J.C. Farmer, journal of Applied Electrochemistry,26, P.1007-1018 (1996)). The method has complicated procedures and high preparation cost, and the doped epoxy resin also can block part of pore channels of the aerogel.
The university of the same university, bohr solid physical research reports a method for preparing carbon aerogel electrodes, first to prepare aerogel sheets, then to glue the sheets to a titanium foil current collector with a conductive adhesive (Xue Hui et al, materials guidance, 20 (9), P.137-139 (2006)). The aerogel sheet has complicated manufacturing procedures, very low yield and difficult large-scale application.
With the rapid development of material science, the preparation of the carbon aerogel has the capacity of mass production, and the carbon aerogel electrode electro-adsorption desalting process has great application potential.
Several companies and research units in the united states are currently attempting to reduce the cost of carbon aerogel production in an effort to reduce the cost of capacitive deionization desalination processes. However, the current process for preparing the carbon aerogel into a monolithic electrode finished product is complicated, and the adhesive is generally required to be added, so that the manufacturing cost of the electrode is greatly increased, and the electro-adsorption performance of the aerogel is reduced. Therefore, it is important to develop new aerogel electrode preparation technology which is cheap and has good performance.
Disclosure of Invention
The invention aims to provide a carbon aerogel electrode for capacitive deionization equipment and a preparation method thereof, wherein a binder is not added in the method, so that the blocking of pores is avoided, and the conductivity, specific capacitance and blocking property of aerogel can be ensured.
The technical scheme adopted by the invention is as follows:
the carbon aerogel electrode for the capacitor deionization device is of a laminated sandwich structure, and is formed by sequentially laminating 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 from bottom to top, wherein the first non-woven cloth layer, the first carbon aerogel layer, the current collector layer, the second carbon aerogel layer and the second separation net layer are tightly stitched into a whole through stitching lines.
The first screen layer and the second screen layer can be non-woven fabrics with electric insulation, and the non-woven fabrics can be made of polypropylene, polyethylene or terylene.
The thickness of the first screen layer or the second screen layer is 0.2-0.5 mm.
The first carbon aerogel layer or the second carbon aerogel layer consists essentially of carbon aerogel particles.
The particle size of the carbon aerogel particles is 10-600 mu m.
The thickness of the first carbon aerogel layer or the second carbon aerogel layer is 0.2-2 mm.
Further, the first carbon aerogel layer or the second carbon aerogel layer is composed of carbon aerogel particles or carbon aerogel mixed particles, the carbon aerogel mixed particles are composed of carbon aerogel particles and additives, and the additives are one or more than two of super-capacitor activated carbon, carbon nanotubes, chopped carbon fibers and conductive carbon black.
Further, the additive is used in an amount of 0 to 15% of the carbon aerogel mixed particles. Wherein 0 represents infinitely close to 0 but not 0.
Further, the dosage of the super capacitor active carbon is 0-15%, preferably 1-15% of the dosage of the carbon aerogel mixed particles, and the dosage of the carbon nano tube is 0-5%, preferably 1-5% of the dosage of the carbon aerogel mixed particles; the diameter of the chopped carbon fiber is 5-10 mu m, the length is 1-20 mm, and the dosage is 0-5%, preferably 1-5% of the carbon aerogel mixed particles; the dosage of the conductive carbon black is 0-5% of the carbon aerogel mixed particles. Wherein 0 represents infinitely close to 0 but not 0.
Further, the pore diameter of the first or second barrier layer is smaller than the particle diameter of the carbon aerogel particles or the carbon aerogel mixed particles. This is to prevent the shedding of the carbon aerogel particles.
Further, the first and second barrier layers have a filter pore diameter of 5 to 7 μm.
The current collector layer is a carbon fiber net, carbon fiber cloth, graphite paper, graphite felt, carbon felt, titanium net, stainless steel net or nickel net. The electrodes made of stainless steel mesh and nickel mesh can be used only as cathodes and acidic water quality should be avoided.
Further, the mesh diameter of the carbon fiber net, the titanium net, the stainless steel net or the nickel net is 0.5-2 cm, and the wire diameter of the fiber or the metal wire is 5-10 um
The thickness of the graphite paper is 0.08-1.5mm.
The thickness of the carbon fiber net and the carbon fiber cloth is 0.08-0.2mm.
The thickness of the graphite felt and the carbon felt is 0.3-1.6 mm.
The thickness of the titanium net, the stainless steel net or the nickel net is 0.5-1 mm.
The suture line is one or more than two of nylon, terylene, polyethylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, polyvinyl alcohol and furan resin, preferably polypropylene, polyethylene or terylene line.
The diameter of the suture line is 0.1-0.3 mm.
The stitching mode is generally to stitch in a rhombic or square grid mode with the side length of 0.5-2 cm.
The collector layer is provided with a section of lug protruding from the electrode at the edge, and is connected with an external lead through the lug, and the lug is preferably long-strip.
The invention also provides a preparation method of the carbon aerogel electrode for the capacitive deionization equipment, which comprises the following steps:
uniformly scattering carbon aerogel particles or carbon aerogel mixed particles on the first screen layer by using a powder scattering machine or a particle walking machine to prepare a first carbon aerogel layer, covering a current collector layer on the first carbon aerogel layer, uniformly scattering the carbon aerogel particles or the carbon aerogel mixed particles on the current collector layer by using the powder scattering machine or the particle walking machine to prepare a second carbon aerogel layer, and covering the second screen layer; thereby forming a 5-layer sandwich structure in which two carbon aerogel layers are sandwiched between two barrier layers and a current collector layer is sandwiched between the centers of the two carbon aerogel layers; and finally, sewing the 5 layers of sandwich structures by using a sewing line to form a firm integrated structure, so as to prepare the carbon aerogel electrode for the capacitive deionization equipment. The stitching mode is generally to stitch in a rhombic or square grid mode with the side length of 0.5-2 cm.
The carbon aerogel electrode for the capacitive deionization device can be used as an electrode of a capacitive deionization device and used for desalination treatment of water or removal of harmful ions such as heavy metal ions, hardness and fluoride ions in water.
The invention discloses a carbon aerogel electrode for a capacitive deionization device, which adopts a laminated sandwich structure and can be assembled in a roll-type or planar mode to prepare a CDI module. The carbon aerogel electrode provided by the invention has the advantages of good integrity, high mechanical strength, capability of being curled and high conductivity. The method does not add binder, thereby avoiding the blocking of pores and ensuring the conductivity, specific capacitance and blocking property of the aerogel. The method has low preparation cost, and the prepared electrode is a flexible electrode, so that the electrode with various shapes can be prepared. The electrode is used for preparing a capacitance deionizing device and is used for desalting water or removing harmful ions such as heavy metal ions, hardness and fluoride ions in water.
The invention has the beneficial effects that:
1. the method does not add binder, thereby avoiding the blocking of pores and ensuring the conductivity, specific capacitance and blocking property of the aerogel. Meanwhile, the electrode can be prevented from being disassembled or falling down due to the aging of the binder after long-term use.
2. The method has simple process, easy mass production and low preparation cost.
3. In the method, the non-woven fabric plays a role of a container of aerogel and an insulating role, and can filter part of suspended matters to avoid blocking gaps of the aerogel.
4. The electrode with the multilayer sandwich structure can be directly assembled into a capacitive deionization device without additionally arranging non-woven fabrics as an insulating layer or configuring a current collector.
5. The electrode prepared by the method is a flexible electrode, and can be curled and cut into any shape. Therefore, the electrode can be assembled in a roll type or planar plate frame mode to form electrodes with various shapes. The electrode has good integrity, high mechanical strength, crimping capability and high conductivity.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a carbon aerogel electrode for a capacitive deionization apparatus.
FIG. 2 is a cross-sectional view of a carbon aerogel electrode for a capacitive deionization apparatus.
In the figure, 1 is a first barrier layer; 2 is a first carbon aerogel layer; 3 is a current collector layer; 4 is a second carbon aerogel layer; 5 is a second barrier layer; 6 is a suture; 7 is a tab.
The specific embodiment is as follows:
the following describes the technical scheme of the present invention with specific examples, but the scope of the present invention is not limited thereto.
Example 1
The structure diagram of the carbon aerogel electrode for the capacitive deionization device is shown in fig. 1 and 2, and is a laminated sandwich structure, which is formed by laminating a first separation net layer 1, a first carbon aerogel layer 2, a current collector layer 3, a second carbon aerogel layer 4 and a second separation net layer 5 from bottom to top in sequence, wherein the first nonwoven cloth layer 1, the first carbon aerogel layer 2, the current collector layer 3, the second carbon aerogel layer 4 and the second separation net layer 5 are tightly stitched into a whole through stitching lines 6.
The collector layer 3 is provided with a section of lug protruding from the electrode at the edge, and is connected with an external lead through the lug, and in this embodiment, the lug is long, 3cm long and 1cm wide.
The thickness of the first screen layer or the second screen layer is 0.2-0.5 mm. In this example, a polypropylene nonwoven fabric having a thickness of 0.5mm and a filter pore diameter of 5 μm was used as the spacer layer.
The thickness of the first carbon aerogel layer or the second carbon aerogel layer is 0.2-2 mm. In this example, the carbon aerogel layer was 0.5mm thick.
When the current collector layer is graphite paper, the thickness of the graphite paper is 0.08-1.5mm, and the embodiment adopts the graphite paper with the thickness of 0.1mm as the current collector layer.
The preparation method of the carbon aerogel electrode for the capacitive deionization equipment comprises the following steps:
the carbon aerogel particles are screened by a screen mesh with 30 meshes and a screen mesh with 50 meshes successively, and the aerogel particles with the particle size of 0.3-0.6 mm and uniform particle size distribution are obtained. 10g of a powder having a particle diameter of 6.4um and a specific surface area of 2000m were taken 2 And (3) mixing the activated carbon/g with 60g of aerogel, and placing the mixture in a stirrer to uniformly mix to obtain the aerogel mixture. A polypropylene nonwoven fabric with a length of 40cm, a width of 40cm, a thickness of 0.5mm and a filter pore diameter of 5 μm was used as a spacer layer. Graphite paper with the length of 40cm, the width of 40cm and the thickness of 0.1mm is used as a current collector layer, and one corner of the graphite paper is protruded with a graphite paper tab with the length of 3cm and the width of 1cm so as to be convenient for connecting wires.
Firstly, a first screen layer is arranged under the aerogel layer, then a powder spreader is adopted to uniformly spread the carbon aerogel particle mixture on the first screen layer, the thickness of the aerogel layer is 0.5mm, then a current collector layer is covered on the aerogel layer, then a layer of aerogel particle mixture (the thickness is 0.5 mm) is spread, and finally a second screen layer is covered, so that a 5-layer sandwich structure is formed. Finally, sewing the sandwich structure by using a polypropylene wire with the diameter of 0.1mm in a diamond form with the side length of 0.5cm, and sewing the periphery of the sandwich layer tightly again. Thereby forming a firm integral structure and obtaining the aerogel electrode. The mass of the monolithic electrode was 114g, and the mass of the aerogel-containing particle mixture was 62g.
The capacitive deionization module formed by the aerogel electrodes is used for sodium chloride desalination performance test: two aerogel electrodes prepared by the method are assembled into a capacitive deionization module with the length and the width of 40 cm. The aerogel electrode plates are separated by a PP net with the thickness of 1mm and the mesh opening of 2mm, so that an electrode spacing of 1mm and a water flow path are formed. The positive and negative poles of the direct current power supply are respectively connected to the lugs of the electrode current collector by leads. 1000mL of sodium chloride solution was prepared with a conductivity of 2026 us/cm. Desalination experiments were performed in a cyclic test mode, and the conductivity of the aqueous solution was monitored in real time using a Lei Ci DDSJ-308F conductivity meter. The operating voltage is 1.4V, the water flow is 100ml/min, and the water temperature is 31 ℃.
The conductivity of the sodium chloride solution was reduced from 2026us/cm to 1082us/cm by an electro-adsorption desalting process for 30 min. And then the power supply is turned off, the positive electrode and the negative electrode of the electrode plate are short-circuited by a lead, and the electrode is regenerated. After a regeneration process of 18min, the conductivity of the solution was restored to 2013us/cm. The mass ratio adsorption capacity of the aerogel electrode plate is calculated to be 4.14mg/g, and the volume ratio adsorption capacity is calculated to be 1.34mg/cm 3 . Therefore, the aerogel electrode with the 5-layer sandwich structure has good electric adsorption performance, and is suitable to be used as an electrode material of capacitance deionization equipment.
Example 2
The carbon aerogel particles are screened by a 50-mesh screen and a 100-mesh screen successively, and the aerogel particles with the particle size of 0.15-0.3 mm and uniform particle size distribution are obtained. 4g of carbon fiber with the wire diameter of 5um and the length of 1cm is taken and mixed with 130g of aerogel, and the mixture is placed in a stirrer to be uniformly mixed, so as to prepare the aerogel particle mixture. A polypropylene nonwoven fabric with a length of 40cm, a width of 40cm, a thickness of 0.5mm and a filter pore diameter of 5 μm was used as a spacer layer. A carbon fiber cloth with the length of 40cm, the width of 40cm and the thickness of 0.1mm is used as a current collector layer, and a section of fiber cloth tab with the length of 3cm and the width of 1cm is protruded from one corner of the carbon fiber cloth so as to be convenient for connecting wires.
Firstly, a first screen layer is arranged under the aerogel layer, then a particle stepper is adopted to uniformly spread the carbon aerogel particle mixture on the first screen layer, the thickness of the aerogel layer is 0.7mm, then a current collector layer is covered on the aerogel layer, then a layer of aerogel particle mixture (the thickness is 0.7 mm) is spread, and finally a second screen layer is covered, so that a 5-layer sandwich structure is formed. Finally, sewing the sandwich structure by using a polypropylene wire with the diameter of 0.1mm in a diamond form with the side length of 0.5cm, and sewing the periphery of the sandwich layer tightly again. Thereby forming a firm integral structure and obtaining the aerogel electrode. The monolithic electrode had a mass of 127g and contained 83g of aerogel particles.
The capacitive deionization module formed by the aerogel electrodes is used for sodium chloride desalination performance test: two aerogel electrodes prepared by the method are assembled into a capacitive deionization module with the length and the width of 40 cm. The aerogel electrode plates are separated by a PP net with the thickness of 1mm and the mesh opening of 2mm, so that an electrode spacing of 1mm and a water flow path are formed. The positive and negative poles of the direct current power supply are respectively connected to the lugs of the electrode current collector by leads. 1000mL of sodium chloride solution was prepared with a conductivity of 1548 us/cm. Desalination experiments were performed in a cyclic test mode, and the conductivity of the aqueous solution was monitored in real time using a Lei Ci DDSJ-308F conductivity meter. The operation voltage is 1.4V, the water flow is 100mL/min, and the water temperature is 29 ℃.
The conductivity of the sodium chloride solution was reduced from 1548us/cm to 682us/cm through the electro-adsorption desalting process for 30 min. And then the power supply is turned off, the positive electrode and the negative electrode of the electrode plate are short-circuited by a lead, and the electrode is regenerated. After a regeneration process of 18min, the conductivity of the solution was restored to 1541us/cm. The mass ratio adsorption capacity of the aerogel electrode plate is calculated to be 5.22mg/g, and the volume ratio adsorption capacity is calculated to be 1.69mg/cm 3 . Therefore, the aerogel electrode with the 5-layer sandwich structure has better electric adsorption performance and is suitable for being used as a capacitorElectrode material of a deionization apparatus.
Claims (7)
1. The carbon aerogel electrode for the capacitor deionization equipment is characterized by being of a laminated sandwich structure and sequentially formed by laminating a first screen layer, a first carbon aerogel layer, a current collector layer, a second carbon aerogel layer and a second screen layer from bottom to top, wherein the first screen layer, the first carbon aerogel layer, the current collector layer, the second carbon aerogel layer and the second screen layer are tightly stitched into a whole through stitching lines; the first carbon aerogel layer or the second carbon aerogel layer is composed of carbon aerogel particles or carbon aerogel mixed particles, the carbon aerogel mixed particles are composed of carbon aerogel particles and additives, and the additives are one or more than two of super-capacitor active carbon, carbon nanotubes, chopped carbon fibers and conductive carbon black; the first screen layer and the second screen layer are non-woven fabrics with electric insulation property;
the carbon aerogel electrode for the capacitive deionization equipment is prepared by the following steps: uniformly scattering carbon aerogel particles or carbon aerogel mixed particles on the first screen layer by using a powder scattering machine or a particle walking machine to prepare a first carbon aerogel layer, covering a current collector layer on the first carbon aerogel layer, uniformly scattering the carbon aerogel particles or the carbon aerogel mixed particles on the current collector layer by using the powder scattering machine or the particle walking machine to prepare a second carbon aerogel layer, and covering the second screen layer; thereby forming a 5-layer sandwich structure in which two carbon aerogel layers are sandwiched between two barrier layers and a current collector layer is sandwiched between the centers of the two carbon aerogel layers; and finally, sewing the 5 layers of sandwich structures by using a sewing line to form a firm integrated structure, so as to prepare the carbon aerogel electrode for the capacitive deionization equipment.
2. The carbon aerogel electrode for a capacitive deionization apparatus as claimed in claim 1, wherein the additive is used in an amount of 0 to 15% of the carbon aerogel mixed particles.
3. The carbon aerogel electrode for a capacitive deionization apparatus as claimed in claim 1, wherein the pore diameter of the first or second barrier layer is smaller than the particle diameter of carbon aerogel particles or carbon aerogel mixed particles.
4. The carbon aerogel electrode for a capacitive deionization apparatus as claimed in claim 1, wherein said current collector layer is a carbon fiber mesh, carbon fiber cloth, graphite paper, graphite felt, carbon felt, titanium mesh, stainless steel mesh or nickel mesh.
5. The carbon aerogel electrode for a capacitive deionization apparatus as claimed in claim 1, wherein said suture is one or more of nylon, polyester, polyethylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, polyvinyl alcohol, furan resin or a mixture of two or more thereof.
6. The carbon aerogel electrode for a capacitive deionization apparatus as claimed in claim 1, wherein the current collector layer is provided with a tab of a protruding electrode at an edge thereof, and is connected to an external lead through the tab.
7. Use of carbon aerogel electrodes for capacitive deionization apparatus as claimed in any one of claims 1 to 6 in capacitive deionization apparatus.
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| CN110112010A (en) * | 2019-05-16 | 2019-08-09 | 哈尔滨工业大学 | Sandwich structure flexible electrochemical energy storage device bend resistance performance improvement method |
| CN113979519B (en) * | 2021-11-08 | 2023-09-15 | 中钢集团马鞍山矿山研究总院股份有限公司 | Capacitive deionization device for removing multiple ions in water |
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| US5626977A (en) * | 1995-02-21 | 1997-05-06 | Regents Of The University Of California | Composite carbon foam electrode |
| CN1776841A (en) * | 2005-08-11 | 2006-05-24 | 上海纳晶科技有限公司 | Composite nano carbon-base film electrode and use therefor |
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Denomination of invention: A special carbon gas gel electrode for capacitive deionization equipment and its preparation method Granted publication date: 20230616 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: ZHEJIANG DOWAY ADVANCED TECHNOLOGY Co.,Ltd. Registration number: Y2024980009333 |