240results about How to "Improve energy storage performance" patented technology

The invention relates to the field of thin film capacitors, and discloses a composite thin film and a preparation method and application thereof. The composite film is formed by thermal crosslinking of a high-temperature dielectric material and a piezoelectric ferroelectric polymer. Wherein the high-temperature dielectric material is polyimide or polyetherimide; the piezoelectric ferroelectric polymer is selected from cyanoethyl cellulose or polyvinylidene fluoride-trifluoroethylene-chlorofluoroethylene (P (VDF-TrFE-CFE)), polyvinylidene fluoride (PVDF) and polyvinylidene fluoride-trifluoroethylene (P (VDF-TrFE)), and the piezoelectric ferroelectric polymer is selected from polyvinylidene fluoride-trifluoroethylene (P (VDF-TrFE)) and polyvinylidene fluoride-trifluoroethylene (P (VDF-TrFE)); wherein the mass ratio of the high-temperature dielectric material to the piezoelectric ferroelectric polymer is 1: (0.00036-0.1). When the composite film is applied to a film capacitor, the effects of high dielectric constant and high breakdown strength, and improvement of thermal stability, thermal conductivity and energy storage performance can be achieved.

The invention provides a sodium-ion battery negative electrode material, a preparation method thereof and a sodium-ion battery, and relates to the technical field of battery negative electrode materials. According to the method, oxidized asphalt is used as a soft carbon material, and hydroxyl-rich biomass (chitin, chitosan and lignin) is used as a hard carbon precursor; and mixing the two materials, and performing crosslinking and carbonization treatment to obtain the sodium-ion battery negative electrode material. According to the technical scheme, by adjusting the proportion of soft carbon and hard carbon and optimizing crosslinking conditions, the crosslinking degree between the soft carbon and the hard carbon is improved, formation of a more stable crosslinking structure is promoted, the specific capacity and the rate capability of the negative electrode material can be effectively improved due to the appearance of the crosslinking structure, the rapid charging and discharging capacity of the negative electrode material under high rate is enhanced, and the service life of the negative electrode material is prolonged. The battery can meet the requirement of quick charging, the applicability of the battery in high-power application is expanded, and the battery has wide application prospects in the fields of electric automobiles, energy storage systems and the like.

The invention relates to plasticity-enhanced lead lanthanum zirconium tin titanate-based antiferroelectric ceramic and a preparation method thereof. The chemical formula of the zirconium tin lead titanate lanthanum-based anti-ferroelectric ceramic is (Pb < 0.975-x > La < 0.02 > Sr < x >) (Zr < 0.5 > Sn < 0.37 > Ti < 0.13 >) < 0.9975 > O < 3 >, x is smaller than or equal to 0.10; and sintering by adopting a flash sintering technology to prepare the plasticity-enhanced lead lanthanum zirconate tin titanate-based antiferroelectric ceramic. Wherein the initial electric field intensity is set to be 100-300 V / cm, and the temperature rise rate of the flash sintering furnace body is 5-15 DEG C / min; when the reading of the current detector reaches the order of magnitude of [mu] A, the electric field intensity is increased to 200-500V / cm; after the current density value reaches 10-30 mA / mm < 2 >, the stable current density is kept for 90-200 s; preferably, the temperature rise rate of the flash burning furnace body is 8-12 DEG C / min.

The invention discloses a preparation method of a polypropylene coarsened film, belongs to the technical field of preparation of electronic and electrical insulating materials, and particularly relates to preparation of the polypropylene coarsened film. The invention aims to solve the technical problem that the specific preparation process is difficult to regulate and control when the polypropylene coarsened film is prepared at present. By adjusting the heating temperature, the torque, the rotating speed of the motor, the gap between the die head and the machine lip, the temperature of the chilling roller, the casting rotating speed and the winding tension of each area of the extruder, the polypropylene coarsening film which is reasonable in surface appearance and thickness and excellent in dielectric property is obtained, the wettability of the obtained polypropylene coarsening film in insulating oil is good, the dielectric property is excellent, and the service life of the polypropylene coarsening film is prolonged. And the prepared oil-immersed capacitor has good energy storage performance. The polypropylene coarsened film prepared by the invention is mainly used for preparing metallized polypropylene films for oil-immersed capacitors and film capacitors.

The invention relates to the technical field of dielectric materials, in particular to a diamine monomer crosslinking modified fluorine-containing ferroelectric polymer, a preparation method and a device. The diamine monomer cross-linked modified fluorine-containing ferroelectric polymer comprises the following components: a semi-crystalline thermoplastic fluorine-containing ferroelectric polymer and a diamine cross-linking agent, the semi-crystalline thermoplastic fluorine-containing ferroelectric polymer is polyvinylidene fluoride with ferroelectricity and a copolymer derivative thereof; the diamine cross-linking agent is short-chain diamine containing a rigid structure; the mass fraction of the diamine cross-linking agent is 0.25%-10% compared with the total mass fraction. The thin film prepared by the invention meets the application requirements of improvement of dielectric constant, reduction of dielectric loss, reduction of leakage current, improvement of breakdown field strength and the like in a high electric field.

The invention relates to the technical field of fused salt phase change energy storage materials, and discloses a sodium alginate-assisted graphene-based fused salt phase change energy storage material and a preparation method thereof. The preparation method comprises the following steps: preparing few-layer graphene oxide; dispersing the few-layer graphene oxide and sodium alginate in a saturated or supersaturated sodium chloride solution, adding an inorganic cross-linking agent, and uniformly mixing to obtain composite hydrogel; the composite hydrogel is subjected to freezing and freeze-drying treatment, and composite aerogel is obtained; and carrying out heat treatment on the composite aerogel to obtain the sodium alginate-assisted graphene-based molten salt phase change energy storage material. According to the phase change energy storage material, the graphene oxide and the carbonized sodium alginate carbon skeleton form an aerogel matrix, the stability of a packaging structure is guaranteed, meanwhile, a large number of NaCl crystals are reserved, the proportion of molten salt is increased, the phase change stability is improved, the molten salt is not prone to leakage in the phase change energy storage process, the energy storage performance and the heat energy management efficiency are remarkably improved, and the application prospect is wide. Wide application prospects are realized.

The invention discloses a preparation method and application of a bifunctional acrylate monomer modified polypropylene coarsening film for an extremely cold-resistant oil-immersed capacitor, and belongs to the technical field of manufacturing of electronic and electrical insulating materials. The invention relates to application of a bifunctional acrylate monomer modified polypropylene coarsened film in an extremely cold resistant oil-immersed capacitor or a thin film capacitor. The preparation method comprises the following steps: (1) respectively adding a polypropylene coarsened film, a monomer, an interface agent, a co-monomer, an initiator and deionized water in certain parts by weight into a reactor, and heating for swelling; (2) heating the reaction system to a certain temperature, and carrying out grafting reaction; and (3) washing, extracting and drying. According to the invention, the bifunctional acrylate is used as a monomer to carry out long-chain branching modification on the polypropylene coarsened film, so that the problem of poor performance of a capacitor in an extreme environment caused by low-temperature embrittlement and high-temperature insulation deterioration of the polypropylene coarsened film is solved. The method has the advantages of good effect, environmental protection, simple process, low cost and the like.

The invention discloses a lead-free energy storage ceramic laminated material, and belongs to the technical field of dielectric energy storage. The lead-free energy storage ceramic laminated material is formed by sequentially laminating lead-free energy storage ceramic with a texture structure and lead-free energy storage ceramic with a non-texture structure, and preferably, the material comprises at least three layers; when the lead-free energy storage ceramic with the texture structure is positioned on the middle layer, the lead-free energy storage ceramic with the non-texture structure is positioned on the two sides of the middle layer; when the lead-free energy storage ceramic with the non-texture structure is located on the middle layer, the lead-free energy storage ceramic with the texture structure is located on the two sides of the middle layer. Based on the structural design of at least three layers, the non-textured ceramic is selected as the high-voltage-resistant layer, the textured ceramic is selected as the high-polarization layer, the lead-free ceramic laminated material with excellent energy storage performance is obtained, and the lead-free ceramic laminated material has wide application prospects in the fields of power electronics and pulse power.

The invention relates to a solid electrolyte film and a preparation method thereof. The method comprises the following steps: uniformly dispersing a carbon-based nano material and a conductive and proton material in a polyvinylidene fluoride (PVDF) solution, and preparing the double-ion conductor solid electrolyte film with a nano pore channel structure through an electrostatic spinning and template method. In the preparation process, the voltage, the flow speed and the receiving distance are controlled, and the uniformity and the conductivity of the pore channel structure are ensured. The obtained film achieves good balance between high ion mobility and mechanical strength, and is suitable for high-performance energy storage equipment, such as a solid-state battery. The electrolyte film shows excellent electrochemical performance and long cycle life.

The invention relates to the technical field of layered product materials, and discloses a polymer-ceramic composite dielectric material, a preparation method and application of the polymer-ceramic composite dielectric material to a capacitor. The preparation method of the polymer-ceramic composite dielectric material comprises the following steps: adding composite modified pullulan and modified composite nanosheets into N, N-dimethylformamide to obtain a mixed solution A, and casting to form a film to obtain an outer film; adding the composite modified pullulan and the modified ceramic-based composite filler into N, N-dimethylformamide to obtain a mixed solution B, and pouring to form a film to obtain an inner-layer film; and clamping the inner-layer film between the outer-layer films, carrying out hot press molding, and cooling to obtain the polymer-ceramic composite dielectric material with a three-layer structure. The polymer-ceramic composite dielectric material provided by the invention has good dielectric property, energy storage property and heat resistance, and can be applied to capacitors.

The invention discloses a liquefied air energy storage combined natural gas power generation system and method.The natural gas power generation system comprises an air liquefaction subsystem, a liquefied air gasification subsystem, an LNG gasification subsystem, a gas turbine subsystem, a waste heat utilization subsystem and a carbon dioxide capture subsystem; the air liquefaction subsystem is used for producing liquefied air; the liquefied air gasification subsystem is used for generating power by utilizing liquefied air; the LNG gasification subsystem is used for applying LNG cold energy to the air liquefaction subsystem and the carbon dioxide capture subsystem, so that LNG is gasified into natural gas; the gas turbine subsystem uses part of natural gas of the LNG gasification subsystem as fuel and is used for power generation; the waste heat utilization subsystem uses flue gas waste heat for power generation; and the carbon dioxide trapping subsystem is coupled with the LNG gasification subsystem and is used for desublimating and trapping carbon dioxide in the flue gas. According to the invention, the defects of large energy loss and low efficiency in the prior art can be overcome, and the emission of greenhouse gases is reduced.

The invention relates to the technical field of power generation and energy storage, and discloses a user-side energy storage oriented robustness strategy optimization method, which comprises a robustness strategy optimization system, and the robustness strategy optimization system comprises a user-side energy storage facility digital twinborn model, a user-side energy storage facility digital twinborn model, a user-side energy storage facility digital twinborn model and a user-side energy storage facility digital twinborn model. The user side energy storage facility digital twinborn model comprises a real-time data acquisition module, a data processing module, a digital twinborn model construction module, a strategy optimization module, a user interaction module, an energy storage control module and an energy storage equipment state monitoring module. By integrating a real-time data acquisition module, a data processing module, a digital twin model construction module, a strategy optimization module, a user interaction module, an energy storage control module and an energy storage equipment state monitoring module, the running state of the energy storage equipment can be monitored and adjusted in real time, so that the running efficiency of the energy storage equipment is improved, and the service life of the energy storage equipment is prolonged; and through real-time monitoring and optimization strategies, safe and stable operation of the energy storage method is ensured, and a comprehensive solution is provided for management of the user side energy storage equipment.

The invention relates to a bimetallic selenide heterostructure and preparation and application thereof. The preparation method comprises the following steps: firstly, synthesizing a selenium nanorod as a template and a selenium source, then coating the selenium nanorod with a bimetallic organic framework (MOF), and finally synthesizing a heterostructure in which bimetallic selenide nanoparticles grow on a hollow carbon tube through in-situ pyrolysis. Compared with the prior art, the method has the advantages that the selenium nanorod is ingeniously used as a template and a selenium source of a one-dimensional structure, and various bimetallic selenide heterostructures can be formed by different combinations of metals through flexible matching of the bimetallic MOF. The bimetallic selenide heterostructure is applied to an electrode material of a secondary battery, and shows excellent energy storage performance of high capacity, high rate and long circulation.

The invention discloses slurry for a positive electrode of a lithium iron phosphate battery, an electrode of the lithium iron phosphate battery, the lithium iron phosphate battery and a manufacturing method of the lithium iron phosphate battery. The slurry comprises the following components in parts by weight: 95-97 parts of an active lithium iron phosphate material; 0.1 to 1 part of rare earth oxide; 1-2 parts of acetylene black; 0.5-2 parts of a conductive agent; 1-5 parts of a binder; 2-3 parts of a positive electrode organic auxiliary agent; 30-40 parts of a positive electrode solvent; the active lithium iron phosphate material is a lithium iron phosphate material doped with a ternary material, the ternary material is one of a high-nickel ternary material LiNi < 0.8 > Co < 0.15 > Al < 0.05 > O < 2 >, LiNi < 0.815 > Co < 0.15 > Al < 0.035 > O < 2 >, LiNi < 0.88 > Co < 0.09 > Al < 0.03 > O < 2 > and lithium nickel cobalt aluminate with the Ni molar ratio being 0.9 or above, the chemical general formula of the lithium nickel cobalt aluminate is LiNi < x > Co < y > Mn < 1-x-y > O < 2 >, and the positive electrode organic auxiliary agent is an organic mixed solution formed by isopropanolamine, glycol and polyethylene glycol. The preparation method has the beneficial effects that the slurry is good in stability, the content of an active material of the positive electrode slurry is high, the electrochemical performance of the battery is remarkably improved, and the discharge specific capacities of the whole battery at 0.5 C multiplying power and 1C multiplying power are respectively greater than 166mAh / g and 159mAh / g.

The present invention discloses a preparation method and application of a graphene-coated tin disulfide nanomaterial, belonging to the technical field of negative electrode materials for lithium-ion batteries. The graphene-coated tin disulfide nanomaterial is prepared by the following method: dispersing graphene oxide in anhydrous ethylenediamine, then adding tin salt and ultrasonically dispersing to obtain a dispersion; adding NaOH solution dropwise to the dispersion, stirring to react, centrifuging, washing, and freeze-drying the reactant to obtain Sn6O4(OH)4 / GO; and calcining Sn6O4(OH)4 / GO and sublimated sulfur at high temperature under an inert atmosphere to obtain SnS2 / RGO. The present invention adopts an efficient and fast preparation method to prepare graphene-coated tin disulfide nanomaterials, and the prepared material particles are evenly distributed and completely coated with graphene, and have excellent rate performance and long cycle performance.

The invention belongs to the technical field of battery negative electrode materials, and particularly relates to a phosphorus-based negative electrode material with a coating structure as well as a preparation method and application of the phosphorus-based negative electrode material. On the basis of the prior art, nano nickel phosphide, red phosphorus and carbon nanospheres are subjected to ball milling to prepare a main body phosphorus-based material, and then the main body phosphorus-based material is coated with a coating layer prepared from a nanofiber material, pyrrole and 5-azaindole, so that the coating layer of the phosphorus-based negative electrode material has elasticity, the volume expansion rate of the phosphorus negative electrode material is reduced, and the service life of the phosphorus negative electrode material is prolonged. According to the nickel phosphide-based negative electrode material and the preparation method thereof, the interface interaction between the phosphorus-based negative electrode material and the binder is enhanced, the prepared nickel phosphide grows on the black phosphorus nanosheet, so that the nickel phosphide has good dispersity, the nickel phosphide nanocrystals can be effectively prevented from being agglomerated, and the energy storage capacity of the nickel phosphide is improved; and after the 5-hydroxy vanillin is grafted, the adhesive has excellent wet adhesion resistance, and can prevent the dissolution of phosphorus element, so that the cycle efficiency of the electrode is improved.

The invention provides a PbZrO3 antiferroelectric capacitor and a preparation method thereof, and relates to the technical field of ferroelectric materials, the PbZrO3 antiferroelectric capacitor comprises a first electrode layer, a PbO layer, a solid solution ferroelectric antiferroelectric layer, a LaNiO3 layer and the like, and phases in the solid solution ferroelectric antiferroelectric layer comprise PbZrO3, a ferroelectric and an Ag-containing Au phase. The invention also provides a preparation method of the capacitor, and the method comprises the following steps: depositing a LaNiO3 precursor solution on a single crystal substrate, and carrying out the crystallization; mixing the PbZrO3 precursor solution with the ferroelectric precursor solution, and then adding Au nanoparticles containing Ag; the LaNiO3 layer is coated with the mixed solution, and crystallization is carried out; depositing the PbO precursor solution on the surface of the antiferroelectric layer of the solid solution ferroelectric, and crystallizing; and carrying out gold electrode deposition to obtain the PbZrO3 antiferroelectric capacitor. The capacitor is high in energy storage efficiency and high in dielectric constant.

The invention discloses a preparation method of a cycloolefin copolymer composite insulating dielectric film, and belongs to the field of capacitors. The invention solves the problems that the insulating property of the polymer dielectric thin film capacitor is degraded and the energy storage efficiency is reduced under the condition of high temperature or high electric field in the prior art. The method comprises the following steps: 1, preparing a cycloolefin copolymer solution; 2, preparing an anhydride grafted cycloolefin copolymer solution; and 3, adding a high-polarity diamine monomer into the anhydride grafted cycloolefin copolymer solution to react, and then coating and carrying out gradient heating thermal imidization treatment. The method is used for preparing the cycloolefin copolymer composite insulating dielectric film.

The invention discloses a high-energy-storage high-entropy ceramic dielectric material based on barium titanate. The material has the following chemical composition: Ba0.2 [(K0. 5Na0. 5) Bi] x (SrCaMg) (2 / 3) (0.4-x) TiO3, and x is equal to 0.16 to 0.20. The high-entropy ceramic is constructed by introducing six A-site cations (K, Na, Bi, Sr, Ca and Mg) into BaTiO3, so that the structure of the high-entropy ceramic is optimized, and the energy storage performance of the high-entropy ceramic is improved. The introduced ions are divided into a ferroelectric phase group and a non-ferroelectric phase group according to ion characteristics, and the ferroelectric phase and the non-ferroelectric phase are relatively balanced. The material has a thin and narrow ferroelectric hysteresis loop and high breakdown field strength, and the energy storage performance is greatly improved on the premise of ensuring certain energy storage efficiency.

The invention discloses a preparation method and application of a water-based flexible electrode capable of being used for loading a large-molecular-weight active material, and aims to solve the problem that the water-based flexible electrode prepared by the existing method is difficult to load the large-molecular-weight active material. The method comprises the following steps: preparing Ti < 3 > C < 2 > T < x > MXene; preparing a high-molecular-weight active material; preparing a sensitized large-molecular-weight active material; preparing a composite material of Ti < 3 > C < 2 > T < x > MXene and a high-molecular-weight active material; preparing bacterial cellulose dispersion liquid; and preparing the water-based flexible electrode. The method is applied to the water-based flexible sodium ion battery and the like. The preparation method is simple, the prepared flexible substrate has high hydrophilicity, high mechanical property and a good conductive network, and the prepared flexible electrode has good electrochemical performance and high mechanical property. The invention belongs to the technical field of energy storage materials.

The invention relates to a high-entropy ceramic capacitor, a ceramic dielectric material for the high-entropy ceramic capacitor and a preparation method, the raw material composition of the ceramic dielectric material comprises NaNbO3, (Na0. 2Bi0. 2Ba0. 2Mg0. 2Zn0. 2) TiO3, H3BO3, CaZrO3 and the like, by controlling the raw material ratio and preparation process parameters of sodium niobate and adopting a multi-step grinding synthesis method, NaNbO3-based high-entropy ceramic is designed, so that the insulation resistance of the high-entropy ceramic capacitor is effectively improved; on the other hand, chemical modification treatment is carried out by introducing (Na0. 2Bi0. 2Ba0. 2Mg0. 2Zn0. 2) TiO3, H3BO3, CaZrO3 and the like, so that the structural stability of an antiferroelectric phase is enhanced, the compactness of the material is improved, and finally, the energy storage performance of the material is optimized and improved.

This utility model provides a composite perforated wood-plastic composite sound-absorbing wall panel, relating to the technical field of building materials. The composite perforated wood-plastic composite sound-absorbing wall panel comprises, from top to bottom, a veneer layer, a wood-plastic composite layer, and a sound-absorbing layer. The veneer layer has evenly distributed through-holes, and the wood-plastic composite layer has sound-absorbing grooves. The through-holes and sound-absorbing grooves are interconnected, and the sound-absorbing grooves are dovetail grooves. The total thickness of the wall panel is ≤19mm. This utility model achieves a significant improvement in the sound absorption performance of the composite wall panel by designing through-holes in the veneer layer, designing sound-absorbing grooves communicating with the through-holes in the wood-plastic composite layer (designing the sound-absorbing grooves in the dovetail groove form), and then designing a sound-absorbing layer on the bottom surface of the wood-plastic composite layer. The sound absorption principle of this utility model is: using the Helmholtz resonance principle, combined with the oblique wall reflection of the dovetail groove and the excellent sound absorption performance of the wood-plastic composite material itself, to achieve a synergistic effect and significantly improve the sound absorption performance of the composite wall panel.

The present invention discloses a method for preparing a high-performance PVDF-based energy storage film based on nanosecond electric pulse induction, the steps of which include: preparing a polyvinylidene fluoride-hexafluoropropylene (P(VDF-HFP) solution, taking an appropriate amount of the solution and evenly dropping it into a cleaned glass groove, and applying different nanosecond electric pulses at a certain temperature. After naturally cooling to room temperature, the film is quenched and then placed in a vacuum drying oven for drying to further remove moisture and residual solvent. The present invention controls the amplitude, pulse width, frequency, pressurization time, vacuum drying time and temperature of the nanosecond electric pulse and customizes the size of the groove, and adopts a solution casting method to obtain β P(VDF‑HFP) films with high phase content and excellent energy storage performance, β The phase content is more than 80%, and the charge and discharge energy density is 14 J / cm 3 , the charge and discharge efficiency can reach more than 60%. The present invention eliminates the complicated secondary process, is simple to operate, greatly saves production costs, and has obvious advantages and application prospects in the preparation of high-performance PVDF-based energy storage films.

This invention discloses a method for preparing interface-reinforced niobium pentoxide / porous graphene and its energy storage application. The method involves adding porous graphene oxide during the solvothermal synthesis of a niobium pentoxide precursor to obtain a composite precursor of niobium pentoxide and porous graphene oxide. This precursor is then annealed under a protective atmosphere to obtain the interface-reinforced niobium pentoxide / porous graphene composite material. The composite material obtained by this invention exhibits excellent performance as an electrochemical energy storage material. Furthermore, the preparation method of this invention is simple to operate, requires no complex equipment, and is easily controlled, making it suitable for mass production.

The invention relates to the technical field of military industry capacitor electrode foils, and discloses a military industry capacitor electrode foil manufacturing method, which comprises: S1, raw material preparation: selecting a high-performance raw material: selecting a high-purity and low-impurity aluminum foil as a raw material, and ensuring the basic performance of the electrode foil; s2, pretreatment: ultrasonic cleaning is adopted, and a nanoscale cleaning agent and a surfactant are added during cleaning, so that impurities such as oil stains and oxides on the surface of the aluminum foil are removed more thoroughly; according to the manufacturing method of the electrode foil of the capacitor for the military industry, the produced electrode foil has excellent electrical performance, thermal stability and mechanical performance, the strict requirement of the capacitor for the military industry for the high-performance electrode foil can be met, the purity and the stability of the electrode foil are remarkably improved through the strict cleaning and post-treatment process, and the electrode foil is suitable for popularization and application. The electrode foil is ensured to have high reliability in the use process, and the optimization of the corrosion process enables the electrode foil to have higher specific surface area and capacitance, so that the energy density of the capacitor is improved.

The invention provides a high energy storage density AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic and a preparation method thereof, belongs to the technical field of ceramic materials, and aims to solve the technical problems of low breakdown field strength resistance and low energy storage density of energy storage ceramics. According to the preparation method, the energy storage performance of silver niobate ceramic is improved by adopting a method of combining B-site ion doping with second-phase compounding, firstly, AgNb0. 5Zr0. 25Mg0. 25O3 and ZrSiO4 nano powder is prepared through a microwave hydrothermal reaction method, and the AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic is obtained through an oscillation pressure sintering method. The prepared AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic with high energy storage density has relatively high breakdown field strength, relatively high dielectric property, energy storage density and good discharge efficiency, the breakdown field strength reaches 750kV / cm, the maximum energy storage density reaches 7.73 J / cm < 3 >, and meanwhile, the composite ceramic has relatively good temperature stability. The AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic prepared by the method has the advantages of low cost, nanoscale particles, excellent energy storage performance and the like, is suitable for large-scale production, and shows good application prospects in pulse power energy storage capacitors.

The embodiment of the invention relates to a germanium-based negative electrode material as well as a preparation method and application thereof. The germanium-based negative electrode material comprises germanium-based composite particles and a carbon coating layer coating the outer surfaces of the germanium-based composite particles, pores of the porous polyaniline form continuous channels and spaces in the porous polyaniline, so that germanium-containing sediments are deposited in the pores of the porous polyaniline to form germanium-based composite particles; the mass percent of the porous polyaniline in the germanium-based composite particles is 15%-95%; the germanium-containing sediment at least comprises elemental germanium, and also comprises or does not comprise silicon-germanium alloy and / or tin-germanium alloy; in the germanium-based negative electrode material, the germanium-based composite particles account for 85%-99% by mass; the germanium elementary substance accounts for 0.1-80% of the germanium-based negative electrode material in percentage by mass; the silicon-germanium alloy or the tin-germanium alloy accounts for 0-15% of the germanium-based negative electrode material in percentage by mass; polar groups-NH <-> and = N <-> of porous polyaniline are used for promoting adsorption and intercalation of lithium ions or sodium ions, active sites of the negative electrode material are increased in the charging and discharging process of the battery, and the electrochemical activity is improved.

The utility model belongs to the technical field of phase change energy storage, and discloses an energy storage cabinet which comprises a cabinet body, a phase change energy storage material, a heat exchange tube and a turbulent flow mechanism. Wherein a closed accommodating cavity is formed in the cabinet body, and a heat exchange medium inlet and a heat exchange medium outlet which are communicated with the outside and the accommodating cavity are formed in the cabinet body; the accommodating cavity is filled with the phase change energy storage material; the heat exchange pipe is spirally arranged in the containing cavity in the axial direction of the containing cavity, and the two ends of the heat exchange pipe communicate with the heat exchange medium inlet and the heat exchange medium outlet correspondingly. The turbulent flow mechanism comprises a rotating shaft arranged in the containing cavity, paddles arranged on the rotating shaft and a rotating driving piece connected with the rotating shaft and arranged outside the cabinet body, and the rotating driving piece is used for driving the rotating shaft to rotate. According to the energy storage cabinet, by arranging the turbulent flow mechanism, the uniformity of heat conduction between the phase change energy storage material and the heat exchange medium is improved, in addition, the turbulent flow mechanism is simple in structure, small in occupied space and small in influence on the filling amount of the phase change material, and the total energy storage amount is guaranteed to a certain degree.

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 belongs to the technical field of resource recycling, and particularly relates to an energy storage bearing material and a preparation method thereof, and a structural electrode and a preparation method and application thereof. The energy storage bearing material provided by the invention has good bearing capacity and energy storage capacity and high compressive strength. The structural electrode provided by the invention has bearing capacity and energy storage capacity at the same time, and is high in compressive strength, high in cycle retention rate, good in stability and good in compatibility with buildings, and the retention rate of 5000 cycles is 93% or above. According to the structural electrode provided by the invention, the electric quantity is stored by adopting a double-electric-layer capacitance principle, and the structural electrode has good stability and durability; meanwhile, hidden dangers of liquid leakage and fire outbreak of a traditional pseudocapacitor can be avoided, the treatment problem caused by scrapping of a chemical battery can be solved, and environmental friendliness and sustainable development are achieved. The structural electrode provided by the invention can be applied to the field of energy development and utilization, and is wide in application scene.