62results about How to "High specific capacitance" patented technology

The invention discloses a high-specific-surface-area high-nitrogen-oxygen-doped lignin porous carbon material as well as a preparation method and application thereof. The method comprises the following steps: firstly, preparing a supramolecular compound from lignin, magnesium hydroxide, cyanuric acid and melamine through solvothermal reaction, then directly carbonizing to obtain a nitrogen-doped lignin carbon / magnesium oxide compound, and activating the nitrogen-doped lignin carbon / magnesium oxide compound by using weakly corrosive sylvite to increase a micro-mesoporous structure. Therefore, the nitrogen and oxygen doped lignin porous carbon material with ultrahigh specific surface area and rich micro-mesopores is prepared. According to the obtained lignin porous carbon material with the high specific surface area and high nitrogen and oxygen doping, a large number of active sites can be provided due to the high specific surface area, wettability of the carbon material can be improved due to high nitrogen and oxygen doping, the utilization rate of the active sites is increased, and the problem that the pore diameter of the carbon material is not matched with a current carrier is solved due to the rich micro-mesoporous structure; and the specific capacitance of the zinc ion hybrid capacitor is obviously improved.

The invention relates to the technical field of capacitor electrode material preparation, in particular to a sulfur-doped nickel-manganese layered double hydroxide electrode material, a preparation method and a capacitor, and the preparation method comprises the following steps: growing sulfur-doped nickel-manganese layered double hydroxide on foamed nickel by using a simple and feasible one-step hydrothermal method; oxygen vacancies are introduced into the electrode material through a safe and harmless chemical reduction method; wherein the layered double hydroxide has a relatively large specific surface area and rich active sites, so that permeation of electrolyte and diffusion of ions are facilitated; through combination of sulfur doping and oxygen vacancy, the electronic structure of the electrode material can be synergistically optimized, and the electrolyte adsorption capacity and the electronic conductivity of the electrode material are enhanced. The problems that in the prior art, due to the fact that transition metal layered double hydroxides are low in electric conductivity and poor in electron transmission efficiency, actual energy density and power density are low, and cycling stability is poor are solved.

The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method of a biomass-based iron-nitrogen-doped carbon catalyst with a full pH range and application of the biomass-based iron-nitrogen-doped carbon catalyst in the field of zinc-air batteries. According to the preparation method, bacterial cellulose, zinc nitrate, ferric chloride and dimethylimidazole are taken as precursors, a clean, efficient and stable soft template method is selected, and Zn < 2 + > gasification and evaporation etching in a pyrolysis process are utilized, so that the derived carbon catalyst generates a large number of defects and a large number of micropores and mesopores, and overgrowth of iron nanoparticles is limited; and the oxygen reduction catalyst with high specific surface area and high catalytic activity and stability in a whole pH range is prepared through drying and high-temperature carbonization process optimization, so that an electrode active material with excellent electrochemical performance is provided.

The invention relates to the field of electrochemistry, discloses a silicon-oxygen-carbon negative electrode material as well as a preparation method and application thereof, and aims to solve the technical problems of poor conductivity and poor cycling stability of a silicon-oxygen negative electrode material. The preparation method comprises the following steps: dispersing conductive carbon in deionized water, and adding a stabilizer silicon monoxide powder to obtain turbid liquid; the preparation method comprises the following steps: dissolving an amino organic compound in deionized water, adding glacial acetic acid to form a protonated solution A, and adding metal salt to form a solution B; and adding the turbid liquid into the solution B, and carrying out chemical reaction, spray drying and high-temperature carbonization to obtain the silicon-oxygen-carbon negative electrode material. The protonated amino organic matter and a silicon-oxygen Si-O-end bond have an attraction effect, and the amino on the silicon-oxygen surface is further bonded with graphitized carbon such as a carbon tube under the electrostatic action of metal ions to form a graphitized carbon tube and amorphous coated carbon crossed through three-dimensional cross-linked stable carbon layer. According to the invention, the coating uniformity and conductivity of the material are innovatively improved from the material structure, so that the capacity exertion and cycling stability of the lithium ion battery are guaranteed.

The invention belongs to the technical field of materials, and relates to a preparation method of a fluorinion-induced manganese oxide composite material and application of the fluorinion-induced manganese oxide composite material as a positive electrode material in an aqueous magnesium ion capacitor. The preparation method comprises the following steps: firstly, preparing a MnO2 precursor from a positive electrode through a hydrothermal method, and annealing to obtain a pure-phase MnO2 nanoflower structure; the preparation method comprises the following steps: preparing MnO2 nanoflowers, adding the prepared MnO2 nanoflowers into polyethylene glycol, adding manganese chloride, potassium fluoride and polyvinylpyrrolidone, carrying out ultrasonic dispersion for 30 minutes, continuously stirring for 1 hour, and transferring the obtained mixed solution into a Teflon reaction kettle for hydrothermal reaction to obtain the MnO2 / Mn2O3 / KMnF3 composite material. The composite material is used as a positive electrode and activated carbon is used as a negative electrode to assemble a water-based magnesium ion capacitor device, and the water-based magnesium ion capacitor device can reach relatively high specific capacitance after an electrochemical test. According to the invention, a hydrothermal method is adopted for synthesis, the process is simple, the material cost is low, and the material is non-toxic and harmless, so that the capacitor has high practical application value and is expected to become a novel green energy storage device.

The present invention discloses a composite electrode material for a lithium-ion hybrid supercapacitor and a preparation method thereof, and obtains a Co3O4@NiFe2O4 / rGO composite material. The Co3O4@NiFe2O4 / rGO composite material is used as the composite electrode material for the lithium-ion hybrid supercapacitor. The Co3O4@NiFe2O4 / rGO composite material exhibits better electrochemical properties, good pseudocapacitive properties, and higher specific capacitance, so that the lithium-ion hybrid supercapacitor obtains high energy density, high power density and excellent cycle life.

The invention discloses a production method for anodizing, chambering and corroding an electrode foil, belongs to the technical field of electrode foils, and adopts ultrasonic waves to generate a cavitation effect in liquid, promote a corrosion process and improve uniform hole forming and performance of an aluminum foil. A domestic plain aluminum foil of 132 microns is used, and proper holes are obtained through three-stage treatment of alkali washing, hole-forming corrosion and chambering corrosion and hole-forming corrosion of a mixed solution composed of sulfuric acid and hydrochloric acid. The polyethyleneimine is added into a reaming phosphoric acid solution to slow down corrosion, aluminum foil holes subjected to three-stage treatment contain Cl <->, metal impurities, phosphoric acid and the like, corrosion is caused to products, and the quality of oxidation films is reduced. Impurities are cleaned through dilute nitric acid, a compact and firm oxidation film is obtained, then sol-gel coating and subsequent formation treatment are carried out, the anode formation chambering corrosion electrode foil is obtained, and the specific capacitance of the foil is effectively improved.

The invention discloses a graphene-nickel oxide composite material prepared on the basis of a one-step hydrothermal method and application of the graphene-nickel oxide composite material in preparation of a lithium ion battery, NiO is integrated into a graphene nanostructure, so that a unique thin nanosheet array with a porous conductive channel is generated, and meanwhile, in the composite material, the graphene-nickel oxide composite material has good electrochemical performance. NiO generates controllable aggregation and re-accumulation, which can buffer electrode stress and improve conductivity, graphene is also beneficial to insertion of lithium ions compared with common graphite, and the added graphene not only improves the conductivity, but also can be used as a flexible substrate of NiO to prevent NiO particles from diffusing into electrolyte in the circulation process. In addition, due to the unique layered hollow structure of NiO, the electrode stress can be reduced by controlling the volume change, and the electrochemical reaction kinetics is greatly improved. The cycling stability and the capacity of the lithium ion battery are effectively improved.

The invention relates to a NiCo2O4 / MnO2 composite nanomaterial and a preparation method and application thereof.The preparation method comprises the following steps that in a three-electrode system with foamed nickel as a working electrode, a solution prepared by dissolving a cobalt source and a nickel source in deionized water serves as an electrolyte, electro-deposition is conducted, and after the foamed nickel is taken out, cleaned and dried, the NiCo2O4 / MnO2 composite nanomaterial is obtained; a nickel-cobalt double-metal hydroxide precursor is obtained; after the nickel-cobalt double metal hydroxide precursor is sintered, a NiCo2O4 nanosheet is obtained; and dispersing potassium permanganate and manganese sulfate in deionized water in an ice-water bath to obtain a mixed solution, putting the NiCo2O4 nanosheet into the mixed solution, stirring, standing at room temperature, and drying to obtain the NiCo2O4 / MnO2 composite nanomaterial. The NiCo2O4 / MnO2 composite nano metal oxide supercapacitor electrode material is prepared through the combination of electro-deposition and in-situ deposition, the power density, the energy density and the cycling stability of a composite nano structure electrode are greatly improved, and the obtained electrode material is high in specific capacity and large in charge-discharge voltage window.

The present invention discloses a super ionic liquid rich microporous nanofiber electrode material and a preparation method and application thereof. The preparation method comprises the steps of: ultrasonically dispersing carbon nanotubes in deionized water, adding a phenol source, stirring and dissolving, and then adding an aldehyde source for phenolic condensation, filtering and washing to obtain graphite carbon@phenolic resin nanofibers with a core-shell structure; carbonizing under an inert atmosphere to obtain graphite carbon@amorphous carbon nanofibers; under an inert atmosphere, mixing graphite carbon@amorphous carbon nanofibers and an activator, carbonizing and activating to obtain a super ionic liquid rich microporous nanofiber electrode material. The electrode material provided by the present invention has conductive inner core carbon nanotubes and in-situ doped nitrogen atoms that synergistically improve the conductivity and electrochemical properties of the material, and the microporous carbon fiber has a super ionic liquid surface, which exhibits high specific capacitance, high specific energy density, excellent rate performance and cycle stability when used as a supercapacitor electrode material.

The invention relates to the technical field of MOF energy storage, in particular to a preparation method of a photoresponse Cu-coated Fe heterogeneous MOF energy storage material, the photoresponse Cu-coated Fe heterogeneous MOF energy storage material and application of the photoresponse Cu-coated Fe heterogeneous MOF energy storage material.The preparation method comprises the following steps that (1) an inner core copper-based MOF is prepared, (2) a core-shell structure Cu-coated Fe-MOF is prepared, (3) surface plasma treatment is conducted, and the photoresponse Cu-coated Fe heterogeneous MOF energy storage material is obtained; and an efficient electron transmission channel is constructed by utilizing the interaction of abundant d-track electrons and a strong pi-d track. And secondly, MIL-101 (Fe) is selected as a shell, and 2, 2 '-bipyridine-5, 5'-dicarboxylic acid is introduced as a photosensitive ligand, so that the photoresponse performance is remarkably enhanced.

The application discloses a preparation method of defect-induced synthesis of porous carbon nanocomposites and application thereof in supercapacitors. The method uses DHPC as a carbon base to anchor Mn3O4. A large number of intrinsic defects on the surface of the DHPC optimize the local electron density distribution and surface performance, accelerate ion kinetics, provide abundant nucleation sites, and enhance the binding activity with Mn3O4. The microwave-assisted synthesis technology is used to realize the uniform dispersion of Mn3O4 nanoparticles on the DHPC, forming a three-dimensional porous network structure. The structure not only improves the conductivity of Mn3O4, but also promotes the rapid diffusion of electrolyte ions and electron transmission, simultaneously relieves the stress damage in the charging and discharging process, and significantly improves the electrochemical performance and cycle stability of the material. Compared with the prior art, the preparation method has the advantages of simple operation, low cost, environmental friendliness and the like.

The invention provides a method for preparing MoxNy through salt-assisted topological nitridation of molybdenum oxide. The preparation method comprises the following steps: mixing molybdenum oxide and metal salt according to a ratio, putting the mixture into a tubular furnace, carrying out nitridation reaction in an ammonia gas atmosphere, cooling the obtained product, and carrying out acid pickling, water washing and drying to obtain a MoxNy material; the molar ratio of the molybdenum oxide to the metal salt is 1: (15-35). According to the invention, the structure and morphology of the product can be optimized by regulating and controlling different salts to assist nitridation and the molybdenum / salt ratio, and the nitrogen-rich MoN nanobelt and the highly nitrogen-rich Mo5N6 one-dimensional porous nanobelt can be prepared by precise regulation and control. In addition, the high nitrogen-rich type Mo5N6 has excellent high specific capacitance. According to the method, low-cost KCl and NaCl are adopted as salt auxiliary agents, and the obtained nitride is high in purity and controllable in phase; meanwhile, the synthesis process is simple, and batch and large-scale preparation is facilitated.

This invention belongs to the field of supercapacitor technology, specifically relating to a molybdenum oxide-molybdenum disulfide@polytannic acid electrode material, its preparation method, and its applications. Using molybdenum foil as the current collector and electrode, this invention prepares a molybdenum oxide-molybdenum disulfide electrode using electrochemical oxidation and hydrothermal methods. A polytannic acid coating is deposited on its surface to prepare a biodegradable molybdenum oxide-molybdenum disulfide@polytannic acid electrode. This electrode is then sandwiched with a biodegradable gel electrolyte and encapsulated with a biodegradable encapsulation material to construct a biodegradable supercapacitor with self-discharge suppression capabilities. By depositing a polytannic acid coating on the surface of the supercapacitor electrode, its self-discharge behavior is suppressed. The polytannic acid coating can prevent parasitic Faraday reactions of impurity ions on the electrode surface and prevent charge transfer, thereby suppressing the capacitor's self-discharge behavior. Simultaneously, the electrode, electrolyte, and encapsulation material can all degrade in simulated body fluids, potentially opening up applications in implantable medical electronic devices.

The invention provides a vanadium-doped Co9S8 nanosheet array as well as a preparation method and application thereof. The invention provides a vanadium-doped Co9S8 nanosheet array preparation method, which comprises: dissolving a cobalt salt and 2-methylimidazole in deionized water, adding foamed nickel, and carrying out a reaction at a room temperature to obtain a Co-ZIF nanosheet array precursor; then adding the VCo-ZIF nanosheets into a sodium metavanadate solution, and carrying out hydrothermal reaction to obtain a VCo-ZIF nanosheet array; and finally, adding the VCo-ZIF into a sulfur source solution, and vulcanizing to obtain the vanadium-doped Co9S8 nanosheet array. The formed porous nanosheet structure can provide a larger active specific surface area, the synergistic effect between Co and V ions can improve the charge storage capacity of the material, and sulfur vacancies on the surface of the electrode material can increase the conductivity and the number of active sites. Practice shows that when the material is used as a supercapacitor electrode material, the specific capacity and the rate capability are remarkably improved.

The invention discloses a preparation method of a high-specific-capacitance supercapacitor electrode based on a carbon material, and the method comprises the steps: mixing the carbon material with a sodium alginate or carboxymethyl cellulose aqueous solution to obtain slurry; coating a substrate with the slurry to form a slurry film, immersing the slurry film and the substrate into a cross-linking agent for cross-linking, and then separating the hydrogel film from the substrate; and washing the hydrogel film with distilled water to remove the residual cross-linking agent, and then immersing the hydrogel film in electrolyte for electrochemical treatment to obtain the high-specific-capacitance supercapacitor electrode. According to the invention, the electrochemical stable potential window can be widened by 30% and the specific capacitance can be improved by about 100% under the condition that the existing commercial carbon material and electrolyte are utilized, and the preparation method is simple, is matched with the existing commercial production line and can realize large-scale preparation.

The invention provides a preparation method of a bamboo-based activated carbon composite electrode material, and belongs to the technical field of activated carbon modification.The preparation method comprises the steps that Zn (CH3COO) 2 and Co (CH3COO) 2 are jointly dissolved in an organic solvent, and a mixed solution is obtained; dispersing bamboo-based activated carbon in water to obtain a dispersion liquid, and adding the dispersion liquid into the mixed liquid to obtain a reaction liquid; reacting the reaction liquid at 180 DEG C for a period of time, cooling, and washing and drying a precipitate obtained by the reaction to obtain a reactant; and in an inert atmosphere, calcining the reactant at 350 + / -2 DEG C for 2 + / -0.1 h, and grinding the calcined product to obtain the bamboo-based activated carbon composite electrode material. The bamboo-based activated carbon composite electrode material prepared by the method has higher specific capacitance, and when the bamboo-based activated carbon composite electrode material is applied to manufacturing of a supercapacitor, the energy density and the performance of the supercapacitor can be remarkably improved. The invention also provides a bamboo-based activated carbon composite electrode material and application thereof.

The invention discloses a multi-atom doped porous carbon material and a preparation method and application thereof.The porous carbon material is sodium lignin sulfonate carbon doped with phosphorus, boron, nitrogen and selenium, and the preparation method comprises the steps that the carbon material is activated and doped through solvothermal reaction to obtain a precursor, and then the precursor is subjected to high-temperature carbonization, potassium hydroxide activation and acid pickling to obtain the multi-atom doped porous carbon material. The polyatom-doped sodium lignin sulfonate porous carbon is obtained. The polyatom-doped sodium lignin sulfonate porous carbon prepared by the method provided by the invention has the advantages of ordered microstructure, hierarchical pore structure and high specific surface area, the specific surface area is greater than 2000m < 2 > / g, and the polyatom-doped sodium lignin sulfonate porous carbon can be applied to a supercapacitor electrode material, can provide a good channel for rapid diffusion and transmission of electrolyte ions in an electrochemical process, and can be used for preparing a supercapacitor electrode material. The utilization rate of active sites is increased, higher specific capacitance and excellent rate capability (the specific capacitance retention rate is greater than 60%) are shown, and the application value is good.

The application discloses a kind of based on magnetic cellulose electric coagulation system, comprising the following steps: with reticular electrode PbO2-Ti and Ti respectively as anode and cathode, concentration is 0.02~0.08g / L magnetic cellulose is added into electrolyte, constructs magnetic cellulose electric coagulation system;The application also discloses a kind of removal method of algae, and magnetic cellulose material has better conductivity and higher charge transfer rate, has greater charge storage capacity and higher specific capacitance, can be used as three-dimensional particle electrode strengthening system polarization in magnetic cellulose electric coagulation system, significantly reduce the energy consumption of electric coagulation system while also improve the efficiency of algae removal.

The invention provides a preparation method of a NiCoMn LDH electrode material rich in oxygen vacancies, and the preparation method comprises the following steps: firstly, adding foamed nickel into a mixed aqueous solution of a 2-methylimidazole ligand and cobalt salt, and after reaction, growing a zeolite imidazole ester skeleton Co-ZIF-L on a substrate; then adding the Co-ZIF-L into a mixed solution of nickel salt and manganese salt, and obtaining NiCoMn LDH through a hydrothermal method; and finally, adding the NiCoMn LDH into a hydrogen peroxide solution, and reacting to obtain the NiCoMn LDH electrode material rich in oxygen vacancies. According to the invention, the active sites, conductivity and stability of the material are increased by utilizing the synergistic effect of Ni, Co and Mn ions and introducing oxygen vacancies, so that the performance of the aqueous alkaline battery is improved.

This invention relates to the field of carbon material preparation technology, specifically disclosing a method for preparing porous carbon materials using a hierarchical synergistic activation method and its application. This method uses waste biomass from *Siraitia grosvenorii* pomace as raw material, sequentially undergoing low-temperature pre-activation, water washing, high-temperature synergistic activation, and isothermal acid washing to obtain porous carbon materials with ultra-high specific surface area. Scanning electron microscopy analysis and pore structure detection results show that the carbon material exhibits a hierarchical porous layered structure. Electrochemical tests show that the material possesses excellent capacitance performance, with a specific capacitance reaching 200-450 F / g at a current density of 0.5 A / g. When this porous carbon material is assembled into a symmetrical supercapacitor, after 10,000 cycles at a current density of 10 A / g, the specific capacitance retention rate remains above 90%, demonstrating good cycle stability and showing promising application prospects in the field of energy storage.

The application provides a preparation method of a flexible thin film electrode based on a multivalent transition metal oxide modified MXene, and comprises the following steps: S1, placing MAX raw materials into acid liquor for etching, and then performing intercalation treatment to obtain an MXene colloidal solution; S2, adding a transition metal oxide dispersion liquid into a reaction kettle to perform a hydrothermal reduction reaction to obtain a multivalent transition metal oxide colloidal solution; and S3, mixing the MXene colloidal solution and the multivalent transition metal oxide colloidal solution, stirring and reacting, and then forming a film to obtain a flexible thin film electrode. The flexible thin film electrode prepared by the application has good mechanical flexibility and electrochemical performance. The multivalent transition metal oxide is stably combined with the MXene, effectively alleviates the problem of the re-stacking of two-dimensional MXene nanosheets, increases the number of active sites, and further improves the electrochemical activity, and the comprehensive performance is excellent.

The invention relates to the technical field of electrode materials, in particular to a flexible supercapacitor electrode material and a preparation method thereof based on cyclic electrochemical deposition, and the method comprises the following steps: pretreating flexible carbon cloth to obtain modified carbon cloth; and preparing an aniline electroplating solution and a graphene oxide electroplating solution, and alternately electrodepositing a PANI layer and an rGO layer on the modified carbon cloth to obtain the electrode material with the PANI / rGOR layer. According to the flexible supercapacitor electrode material and the preparation method thereof based on the cyclic electrochemical deposition, the thickness and the proportion of the PANI layer and the rGO layer can be accurately adjusted by controlling the electrodeposition time, the potential and the cycle index, so that the PANI layer and the rGO layer are alternately deposited to form a compact and firmly-combined layered structure, and the flexible supercapacitor electrode material is prepared. And the peeling problem caused by the volume change of the PANI in the charging and discharging process is effectively relieved.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a three-dimensional Co / Ni-ZIF nanosheet and carbon fiber cloth electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, carbon fiber cloth is activated, and after the reaction is finished, cleaning and drying are conducted to obtain activated carbon fiber cloth; (2) dissolving a cobalt source, a nickel source and a 2-methylimidazole ligand in different proportions in methanol, and uniformly mixing to obtain a reaction solution; soaking the obtained activated carbon fiber cloth in the reaction solution, carrying out solvothermal reaction, and growing a three-dimensional Co / Ni-ZIF nanosheet on the surface of the carbon fiber cloth in situ; and (3) after the reaction is finished, taking out the carbon fiber cloth, washing and drying to obtain the Co / Ni-ZIF nanosheet and carbon fiber cloth electrode material with the three-dimensional porous network structure.The Co / Ni-ZIF nanosheet and carbon fiber cloth electrode material with the three-dimensional porous network structure can solve the problems that an existing electrode material is poor in flexibility, poor in energy storage effect and poor in cycling stability.

The application discloses a carbon aerogel adsorption electrode and an electric adsorption system based on the carbon aerogel adsorption electrode, and a method for preparing the carbon aerogel adsorption electrode. The method adopts normal pressure drying technology, greatly reduces energy consumption in the electrode preparation process while ensuring that the electrode has large porosity. Compared with the existing electric adsorption process for regenerating circulating cooling water, the electrode regeneration process needs to be suspended for adsorption, which influences the adsorption and regeneration efficiency. The application adopts ex-situ regeneration electric adsorption, improves ion adsorption capacity, and realizes electrode regeneration in ex-situ, thereby ensuring continuous operation of the electric adsorption process, improving the adsorption and regeneration efficiency, and further improving the desalination efficiency. The electric adsorption system can be used for removing anions and cations of the circulating cooling water, and the obtained regenerated water can be used as make-up water for a cooling tower.

The invention discloses a layered MFI molecular sieve / reduced graphene oxide composite material as well as a preparation method and application thereof. The composite material is prepared by combining a layered MFI molecular sieve and graphene oxide in an ammonium salt solution and carrying out heat treatment. The composite material comprises reduced graphene oxide and a layered MFI molecular sieve embedded on the wrinkled surface of the reduced graphene oxide. The average length of the layered MFI molecular sieve is 80-200 nm, the average width of the layered MFI molecular sieve is 40-100 nm, the average thickness of the layered MFI molecular sieve is 10-20 nm, the pore size of the layered MFI molecular sieve is 0.5-0.68 nm, and the molar ratio of SiO2 to Al2O3 is (10-30): 1. The composite material provided by the invention has high specific capacitance, excellent cycling stability and excellent rate capability, the specific capacitance can reach 523.5 F.g <-1 > under the current density of 0.5 A.g <-1 >, and the capacitance retention rate reaches 80.1% after 10,000 times of circulation under the current density of 10 A.g <-1 >. The symmetric supercapacitor prepared from the composite material has excellent and stable electrochemical performance, and the energy density of 20.67 Wh.kg <-1 > is still kept under the power density of 2750 W.kg <-1 >.

The utility model provides a graphdiyne modified flexible supercapacitor electrode slice assembly, which comprises a support assembly and a capacitor assembly, the outer side surface of the support assembly is provided with an electrode assembly used for being connected with a discharge device, the support assembly comprises a support layer used for supporting the capacitor assembly and a support outer layer, and the support outer layer is provided with an electrode. Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the supporting layer comprising the supporting plate and the honeycomb plate and the supporting assembly of the supporting outer layer, when in use, the supporting plate provides basic bearing, and the honeycomb plate disperses stress with high mechanical efficiency by virtue of a unique porous structure, so that the strength of the honeycomb plate is improved, and the service life of the honeycomb plate is prolonged. And meanwhile, the supporting outer layer further buffers external impact and protects an internal capacitor assembly, the three parts are combined, so that the electrode plate has excellent mechanical stability, electrochemical performance and environmental adaptability, and the requirements of wearable equipment, flexible electronics and other scenes can be met.

The invention belongs to the technical field of supercapacitor electrode materials, and particularly relates to a nickel oxide / poly (3-ethylindole) composite electrode, a supercapacitor and a preparation method of the composite electrode. A titanium mesh is used as a current collector, 3-ethylindole is used as a polymeric monomer, nickel nitrate hexahydrate is used as a nickel source, and hexadecyl trimethyl ammonium bromide is used as a structure-directing agent; a nickel oxide / poly (3-ethylindole) composite electrode and a symmetric supercapacitor are prepared through an integrated process of current collector modification, substrate preparation through constant-current polymerization, sol-gel, hydrothermal nickel oxide preparation, spraying, sintering and compounding, and gel electrolyte assembly, and cooperative regulation and control of current collector interface modification and composite electrode structure design are realized. And the limitation that the current collector and the active layer interface are weak in bonding and charge transfer is blocked in the traditional process is broken through.

The invention is suitable for the technical field of chemical power sources, and provides a preparation method of a porous ferroferric oxide symmetric capacitor, which comprises the following steps: putting an iron source salt solution, a pore-forming additive and a carbon material substrate subjected to surface treatment into a reaction kettle, putting the reaction kettle into a drying oven, carrying out hydrothermal reaction, and after the hydrothermal reaction is finished, obtaining a porous ferroferric oxide symmetric capacitor; the porous iron trioxide carbon material is obtained; performing electrochemical conversion on the porous ferric oxide-carbon material by adopting a cyclic voltammetry method to obtain a flexible porous ferroferric oxide-carbon material; and taking the porous ferroferric oxide and carbon material as a positive electrode material and a negative electrode material respectively, taking two electrode clamps to clamp the positive electrode material and the negative electrode material respectively, placing the positive electrode material and the negative electrode material in an electrolytic tank containing a neutral salt solution, and assembling to obtain a supercapacitor monomer. The invention also provides a symmetric capacitor of porous ferroferric oxide and an application thereof. The capacitor has the advantages of high specific capacitance, high energy density, good cycling stability, long service life and the like.

The application discloses a preparation method of a high specific capacitance supercapacitor electrode based on carbon materials, which comprises the following steps: mixing carbon materials with sodium alginate or a carboxymethyl cellulose aqueous solution to obtain a slurry; coating the slurry on a substrate to form a slurry film, immersing the slurry film together with the substrate in a crosslinking agent to perform crosslinking, and then separating the hydrogel film from the substrate; cleaning the hydrogel film with distilled water to remove residual crosslinking agent, and then immersing the hydrogel film in an electrolyte to perform electrochemical treatment, so as to obtain a high specific capacitance supercapacitor electrode. The application can widen the electrochemical stable potential window of the carbon materials and the electrolyte by 30% and improve the specific capacitance of the carbon materials by about 100% under the condition that the carbon materials and the electrolyte are used in existing commercial applications, and the preparation method is simple, compatible with existing commercial production lines, and can realize large-scale preparation.