28results about How to "Improve energy storage efficiency" patented technology

The utility model provides a temperature regulating system of a compressed air energy storage chamber, which comprises an artificial chamber horizontally arranged underground, a vertical shaft arranged at the top of the artificial chamber, an air circulating pipeline and a water pipeline, the air circulating pipeline and the water pipeline are arranged in the artificial chamber, and an air inlet and an air outlet at two ends of the air circulating pipeline are oppositely arranged along two sides of the artificial chamber respectively. An axial flow fan is arranged in an air inlet of the air circulating pipeline, the water pipeline comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is communicated with a water outlet of the warm water tank and an in-plant circulating cooling water inlet, the water outlet pipeline is communicated with a water inlet of the cold water tank and an in-plant circulating cooling water return port, and a spiral heat exchange pipe is arranged between the water inlet pipeline and the water outlet pipeline. The spiral heat exchange pipe is embedded in the air circulation pipeline behind the axial flow fan and used for exchanging heat with air in the chamber, adjusting the temperature of the air in the artificial chamber during inflation energy storage and deflation energy release, guaranteeing the structural safety of surrounding rock around the artificial chamber and prolonging the service life of sealing materials in the chamber.

The application provides an energy storage device, an energy storage module, an energy storage system, a charging network and a heat management method thereof. The energy storage device comprises an energy storage module, a heat exchange module, a heat dissipation module and a heat exchange pipeline assembly. The energy storage module comprises a plurality of battery devices. At least part of the heat exchange module is embedded in a ground source to exchange heat with the ground source. At least part of the heat dissipation module is exposed to an atmospheric source to exchange heat with the atmospheric source. The heat exchange pipeline assembly is used to circulate a heat exchange medium. The heat exchange pipeline assembly comprises a main heat exchange pipeline, a first bypass pipeline, a second bypass pipeline and a third bypass pipeline. The heat exchange module and the heat dissipation module can exchange heat with the battery devices. The energy storage device provided by the application has low operating power consumption, thereby effectively improving the energy storage efficiency of the energy storage device.

This invention relates to the field of flow battery technology, specifically disclosing a flexible graphite bipolar plate with high surface conductivity, its preparation method, and its application. The preparation method includes the following steps: (1) chemically and thermally treating flake graphite to obtain expanded graphite sheets; (2) spraying a PEDOT:PSS solution onto the first layer of expanded graphite sheets, then laying a second layer of expanded graphite sheets, and pre-pressing to obtain an EG-PEDOT:PSS composite material; (3) impregnating the EG-PEDOT:PSS composite material with an epoxy resin solution, and performing water bath curing and drying treatment to obtain a PEDOT:PSS-EG-EP composite material; (4) using a hot-pressing molding process to obtain a flexible graphite bipolar plate with high surface conductivity. This invention improves the overall conductivity of the graphite bipolar plate and enhances the energy storage efficiency of flow batteries.

The invention discloses a polyimide dielectric film containing carboxyl betaine and a preparation method thereof. The carboxyl betaine-containing polyimide dielectric film is prepared from carboxyl betaine-containing polyimide, and the carboxyl betaine-containing polyimide is prepared by the following steps: firstly, taking a precursor of carboxyl betaine, m-phenylenediamine and bisphenol a type diether dianhydride as monomers, and carrying out condensation polymerization to obtain polyamide acid; carrying out complete imidization on the polyamide acid under the action of a catalyst isoquinoline to obtain polyimide containing a precursor; and reacting the polyimide containing the precursor with sodium bromoacetate to obtain polyimide containing carboxyl betaine. The zwitterions are introduced into the polyimide structure to improve the dielectric and energy storage performance of the polyimide dielectric film, and meanwhile, the preparation method has the advantages of being low in cost, simple in process, controllable and adjustable in performance, suitable for large-scale application and the like.

The application discloses an iron-based barium sodium niobate ceramic material with high energy storage performance and a preparation method thereof. 4‑2x Sm 2x Na2Fe x Nb 10‑x O 30 , wherein 1<=x<=1.25. Barium carbonate, samarium oxide, sodium carbonate, ferrous oxide and niobium pentoxide are used as raw materials, and a standard solid-phase method is adopted to sinter the iron-based barium sodium niobate ceramic material. In the product formula, iron is used to replace niobium in the barium sodium niobate, which is lead-free, environment-friendly, rich in iron reserves and low in price, and is beneficial to control the cost of raw materials. In addition, the iron replacement is beneficial to enhance the relaxor ferroelectric performance of the material, can obtain a more slender hysteresis loop, and improves the energy storage efficiency of the material. The prepared ceramic material has few pores and cracks, high density, and the microstructure is obviously improved, the grain size is more fine and uniform, the ferroelectric polarization intensity and the breakdown field strength are significantly improved, the problem that the barium sodium niobate material is difficult to sinter is solved, and the ferroelectric performance and the energy storage performance are significantly improved.

This invention provides a production line-type elastic component energy storage system and its operating method. The production line-type elastic component energy storage system includes an elastic energy storage device, a conveying device, and a control mechanism. The elastic energy storage device includes at least one elastic energy storage component, an energy storage drive device, an input transmission mechanism, an output transmission mechanism, and an energy storage conversion device. By setting multiple elastic energy storage components and conveying devices, continuous energy storage operation is achieved on the elastic energy storage components, improving energy storage efficiency. This invention also provides an operating method for the production line-type elastic component energy storage system. By setting a minimum and a maximum set value for the elastic force of the elastic energy storage component, the elastic force of the elastic energy storage component at the workstation is detected, and the relationship between the detected elastic force value and the set value is compared, thereby selecting whether to perform energy storage or energy release operation. This method has simple steps, can quickly determine and select the corresponding energy storage or energy release operation, and has high working efficiency.

The application provides an energy storage system, characterized in that the energy storage system comprises an energy storage device, a first energy storage module and a second energy storage module, wherein the energy storage device comprises a liquid storage device and a gas storage device and is arranged in an underwater area; the first energy storage module comprises a first compression device for compressing a first medium and a first expansion device for expanding the first medium, and the first energy storage module is connected with the gas storage device through a first pipeline; the second energy storage module comprises an evaporation device and a condensation device, and is used for storing and releasing energy by using the gas-liquid phase change of a second medium; the second energy storage module is connected with the gas storage device through a second pipeline and is connected with the liquid storage device through a third pipeline; and the first expansion device is connected with the second energy storage module through a fourth pipeline, so as to transfer the heat of the first medium to the second energy storage module. According to the above, the first energy storage module and the second energy storage module are coupled to store energy, and in the energy releasing stage, the heat generated by the first energy storage module is transferred to the second energy storage module, so that the energy storage efficiency is improved; the space of the gas storage device is used for shared storage of the first medium and the second medium, in the energy storage stage, the first medium is input and the second medium is output, and in the energy releasing stage, the first medium is output and the second medium is input, so that the utilization rate of the underwater space is improved.

This utility model discloses a distributed photovoltaic energy storage system, belonging to the field of photovoltaic energy storage technology, aiming to solve the problems of high thermal runaway risk, low conversion efficiency, and insufficient synergy between photovoltaic and energy storage in existing centralized energy storage technologies. The system includes multiple distributed energy storage PACK modules and an inverter. Each PACK module integrates photovoltaic modules, an energy storage battery pack, a DC MPPT DC / DC charge / discharge controller, and a BMS. Multiple PACK modules are connected in series to form a series group, and the output of the series group is connected to the inverter to achieve AC / DC conversion. Intelligent control and monitoring can also be achieved through an EMS communication manager and a power detector. This utility model reduces the risk of thermal runaway through a distributed design, improves efficiency by integrating an MPPT controller, adapts to traditional installation methods and supports flexible expansion, and can achieve efficient synergy and peak shaving between photovoltaic and energy storage, thereby improving the economic efficiency of energy utilization.

The utility model discloses a kind of axial flow centrifugal compressor for compressed air energy storage, it is related to energy storage technical field, comprising: axial flow section, centrifugal section and main shaft;The axial flow section has casing and the axial flow rotor in the casing, the centrifugal section has volute and the centrifugal rotor in the volute, the casing is connected with the volute;The axial flow rotor is connected with the one end of the main shaft by fastener, the centrifugal rotor is sleeved on the main shaft, the upstream end of the centrifugal rotor is supported on the boss of the main shaft the downstream end of the centrifugal rotor is detachably connected with the main shaft by connecting structure.The utility model technical scheme, axial flow rotor and centrifugal rotor are respectively set as detachably connected with main shaft, so that axial flow rotor, centrifugal rotor and main shaft can be separately produced, for large flow, high pressure ratio compressor, independent production facilitates each part manufacturing.

The invention relates to the technical field of new energy storage and terrestrial heat development engineering, and discloses a multi-field coupling dynamic monitoring method for a hot dry rock energy storage system in a high-altitude area, and the method comprises the steps: constructing a multi-field coupling numerical model of a hot dry rock reservoir; wherein the multi-field coupling numerical model comprises simultaneous solution of a two-dimensional energy conservation equation, a two-dimensional seepage control equation and an elastic mechanics control equation; collecting monitoring data of the hot dry rock reservoir through a distributed optical fiber sensor; performing multi-field coupling analysis on the monitoring data according to the multi-field coupling numerical model to obtain an analysis result; and dynamically adjusting the hot dry rock energy storage system according to an analysis result. According to the method, the limitation of traditional single physical field monitoring is solved, so that the performance evaluation precision of the hot dry rock reservoir is improved, and the energy storage efficiency of the high-altitude hot dry rock reservoir is improved. The invention further discloses a multi-field coupling dynamic monitoring device and electronic equipment for the hot dry rock energy storage system in the high-altitude area.

The application provides an energy storage device, an energy storage module, an energy storage system, a charging network and a heat management method thereof. The energy storage device comprises an energy storage module, a heat exchange module, a heat dissipation module and a heat exchange pipeline assembly. The energy storage module comprises a plurality of battery devices. At least part of the heat exchange module is embedded in a ground source to exchange heat with the ground source. At least part of the heat dissipation module is exposed to an atmospheric source to exchange heat with the atmospheric source. The heat exchange pipeline assembly is used to circulate a heat exchange medium. The heat exchange pipeline assembly comprises a main heat exchange pipeline, a first bypass pipeline, a second bypass pipeline and a third bypass pipeline. The heat exchange module and the heat dissipation module can exchange heat with the battery devices. The energy storage device provided by the application has low operating power consumption, thereby effectively improving the energy storage efficiency of the energy storage device.

The invention belongs to the technical field of power plant fused salt heat storage and heat release, and particularly relates to a power plant fused salt heat storage and heat release system and method. The heat transfer pipes are each of a spiral structure and internally provided with turbulent flow protrusions, and the heat preservation units are each of an aluminum silicate fiber and polyurethane foam compound structure. The control unit comprises a controller and a double-monitoring unit and can adjust the pump set and the valve in a linkage mode. The method comprises the steps of heat storage preparation, heat storage, heat release preparation, heat release and system adjustment, data are collected through the monitoring unit, the controller dynamically adapts to temperature, pressure and power plant load changes, and fused salt solidification and abnormal working conditions are prevented and controlled. The problems that a traditional device is low in heat transfer efficiency, large in heat loss and poor in stability are solved, the heat exchange and energy storage efficiency is improved, scaling is reduced, different operation scenes are adapted, and efficient and stable operation of the system is guaranteed.

This utility model belongs to the field of heat dissipation technology for aerospace single-unit electronic components, and discloses a thermally conductive and temperature-equalizing energy storage device and an aerospace single-unit. The thermally conductive and temperature-equalizing energy storage device includes a shell and a temperature-equalizing component; wherein, an energy storage cavity is provided inside the shell, and the energy storage cavity is filled with an energy storage medium capable of absorbing heat; the temperature-equalizing component is disposed within the energy storage cavity, and a flow channel is opened within the temperature-equalizing component, with a working medium disposed within the flow channel; at least a portion of the temperature-equalizing component is in contact with the energy storage medium, and the temperature-equalizing component is configured to transfer heat. The thermally conductive and temperature-equalizing energy storage device provided by this utility model accelerates the speed of heat transfer, improves the efficiency of heat transfer, and improves the energy storage efficiency of the energy storage device.

The invention discloses a high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium, a method and application, and belongs to the technical field of molten salt heat storage. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium is prepared from K2CO3, Li2CO3, Na2CO3, AlCl3 and Al powder in percentage by mass, the Al powder and the AlCl3 powder are introduced into carbonate molten salt, the application target that the heat storage performance is excellent at the temperature of 600-850 DEG C can be achieved, and the heat transfer and storage efficiency of the carbonate molten salt is improved. And meanwhile, [Al] with considerable activity is generated by virtue of potential regulation capability of dissolved metal ions and gaseous chloride products by virtue of physical adsorption and chemical adsorption acting forces, so that the aim of reducing corrosion is fulfilled. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium disclosed by the invention realizes the application goals of excellent heat storage performance and low corrosivity, is high in stability, simple in preparation process and easy for large-scale production, and can be applied to photo-thermal power generation and molten salt energy storage.

The invention discloses a distributed solar power supply and wireless networking system, and relates to the technical field of distributed solar power supply networking, and the system comprises a metamaterial composite heat collection module which uses a gradient nanorod array and a phase change material to improve the power generation efficiency; the self-adaptive energy storage module optimizes energy management by means of a honeycomb ceramic container and bidirectional conversion; the dynamic topology networking module is used for constructing a hybrid topology based on a block chain and shortening communication delay; and the intelligent power scheduling module is used for improving the energy utilization rate by using a reinforcement learning algorithm, and further comprises a self-repairing photovoltaic unit and an environment self-adaptive heat dissipation and intelligent fault diagnosis module to realize system self-maintenance and fault early warning. The system is advantaged in that daily generating capacity is improved, fault diagnosis accuracy is improved, battery life is prolonged, self-repairing capability is strong, maintenance cost is low, and the system is suitable for remote area power supply and Internet of Things nodes.

This utility model discloses an electrode boiler coupled with a solid thermal storage boiler energy storage system. The water supply pipe is connected to the electrode boiler via valve 5, and the output of the electrode boiler is connected to a first spherical tank via a pipe via valve 6, and then to a second spherical tank via valve 1. The output of the first spherical tank is connected to the user end via a pipe and valve 7, and the output of the second spherical tank is connected to the user end via a pipe and valve 3. The pipes connecting the second spherical tank to the user end pass through the solid thermal storage boiler. The system has high energy storage efficiency, long lifespan, and high safety. The solid thermal storage boiler directly heats the saturated steam stored in the spherical tanks, enabling rapid adaptation to changes in different heating scenarios and demands. It solves the problem that the superheated steam generated by the electrode boiler's superheater cannot be continuously and stably utilized during off-peak hours. The energy storage system can produce both saturated steam and superheated steam.

The invention relates to a broadband low-phase-noise voltage-controlled oscillator based on a CMOS (Complementary Metal Oxide Semiconductor) process, aiming at solving the problems that the wide tuning and low-phase-noise of the traditional Class-F VCO are difficult to be compatible, the tuning range is narrow and the like. The core architecture comprises four parallel VCO (Voltage Controlled Oscillator) units, a matched buffer and a two-stage alternative selector, each VCO unit is integrated with an exclusive optimized transformer, a multi-bit digital controlled switched capacitor array and a parallel resistor array, and a unilateral tuning design is adopted. The switched capacitor array comprises a coarse tuning unit and a fine tuning unit, and is matched with the overlapping margin of each VCO sub-band to realize seamless connection; the transformer adopts a composite regular octagonal structure, so that the quality factor and the coupling coefficient are improved; the buffer suppresses signal crosstalk, and the selector ensures rapid low-loss switching. According to the scheme, ultra-wide continuous tuning is achieved, the full-band phase noise optimally reaches-131.666 dBc / Hz and 1 MHz, the frequency stepping precision and the signal stability are both considered, and the antenna is suitable for high-frequency and high-requirement scenes such as 5G millimeter wave communication and radar detection.

The present invention relates to a lanthanum, vanadium, and iron co-doped bismuth titanate layered perovskite thin film, a preparation method, and an application. The method includes the following steps: S1. Mix bismuth nitrate pentahydrate, lanthanum nitrate hexahydrate, tetrabutyl titanate, vanadyl acetylacetonate, iron nitrate nonahydrate, ethylene glycol monomethyl ether, acetic acid, and a chelating agent to obtain a Bi 3.25 La 0.75 Ti 3‑2x V x Fe x O 12 (BLTVF) sol, where 0 < x < 0.5; S2. Coat the BLTVF sol on a substrate to obtain a wet film; S3. Perform pyrolysis and annealing treatment on the wet film in air; S4. Repeat steps S2 and S3 to obtain a lanthanum, vanadium, and iron element co-doped Bi 3.25 La 0.75 Ti 3‑2x V x Fe x O 12 thin film. The present invention has significantly improved the energy storage performance and energy storage efficiency of the thin film on the Pt / Ti / SiO2 / Si substrate; the preparation method is extremely simple, the content of the added elements is flexibly controllable, the success rate of thin film preparation is high, and the repeatability is good; only simple processes and low-cost equipment are required, and the environmental requirements are simple, which is suitable for batch production.

The present application relates to a liquid air energy storage system based on frequent start-stop, comprising an air purification unit, an air pressurization unit matched with a cold source, a heat exchange unit, a circulating cold preservation unit, an air liquefaction storage unit and a power generation unit coupled with a heat source. The air pressurization unit matched with the cold source comprises an air compressor and a first heat exchanger communicated with the compressor inlet. The heat exchange unit matched with the cold source mainly comprises a cold box heat exchanger. The circulating cold preservation unit mainly comprises a cold storage device. The air liquefaction storage unit comprises a throttle valve and a liquid air storage tank. The power generation unit coupled with the heat source comprises a cryogenic pump, an expander and a second heat exchanger communicated with the expander inlet. The system contains four working substances, namely the cold source, air, nitrogen and the heat source. Through the above equipment and the circulating work of the working substances, the continuous operation of the liquid air energy storage system can be realized, the practical problems such as long pre-cooling time and large cold source consumption can be solved, and the liquid air energy storage project can be promoted.

The invention belongs to the technical field of organic fluorine chemical industry, and particularly relates to lithium trifluoromethanesulfinate as well as a preparation method and application thereof. The preparation method of the lithium trifluoromethanesulfinate is characterized by comprising the following steps: firstly, mixing and dissolving sodium sulfite, lithium carbonate, tetrabutylammonium decatungstate and sodium ascorbate in a solvent, deoxidizing the obtained system, then introducing trifluoromethane gas, controlling the reaction pressure to be 0.4-1.0 MPa, turning on a visible light source, and after the reaction is finished, cooling to room temperature to obtain the lithium trifluoromethanesulfinate. Controlling the wavelength of a light source to be 400-430nm, carrying out illumination reaction to obtain a reaction solution, and finally, carrying out post-treatment on the reaction solution to obtain lithium trifluoromethanesulfinate. The preparation method provided by the invention is efficient, low in cost and environment-friendly, and the prepared lithium trifluoromethanesulfinate is high in purity and high in yield and can be applied to the fields of lithium supplement of lithium ion batteries, energy storage equipment or pharmaceutical chemical industry.

The utility model relates to the field of energy storage, concretely relates to a kind of energy storage device, comprising: shell, phase-change energy storage piece, heating component;The first accommodating cavity and second accommodating cavity are provided in the shell;The first accommodating cavity and the second accommodating cavity are all provided with phase-change energy storage piece;The heating component is connected with the first accommodating cavity and / or the second accommodating cavity, and the heating component is used to store energy for the phase-change energy storage piece.In the first accommodating cavity and second accommodating cavity, phase-change energy storage piece is provided;Heating component is provided outside the shell, and the heating component is connected with the first accommodating cavity and the second accommodating cavity, so that the heating component can provide thermal energy for the first accommodating cavity and the second accommodating cavity, so that the phase-change energy storage piece in the first accommodating cavity and the second accommodating cavity realizes energy storage, to improve the energy storage efficiency of energy storage device;Phase-change energy storage piece can also be applied to heating or refrigeration equipment, to make relevant equipment realize refrigeration or heating.

The energy accumulator comprises an energy storage unit, the energy storage unit comprises a shell, a first-stage energy storage carrier layer and a second-stage energy storage carrier layer, a cavity is formed in the shell, an inlet and an outlet which communicate with the cavity are formed in the shell, the first-stage energy storage carrier layer comprises a plurality of first-stage solid particles, and the second-stage energy storage carrier layer comprises a plurality of second-stage solid particles. The first-level energy storage carrier layer comprises a plurality of first-level solid particles, the plurality of first-level solid particles are arranged in the cavity to form a first-level energy storage carrier layer with a first thickness, the second-level energy storage carrier layer comprises a plurality of second-level solid particles, the plurality of second-level solid particles are arranged in the cavity to form a second-level energy storage carrier layer with a second thickness, the second-level energy storage carrier layer is stacked above the first-level energy storage carrier layer, and the second-level energy storage carrier layer is stacked above the second-level energy storage carrier layer. The first-stage energy storage carrier layer is arranged at the downstream of the first-stage energy The particle size of the secondary solid particles is smaller than that of the primary solid particles. In this way, the fluid can exchange heat with the first-stage solid particles of the first-stage energy storage carrier layer and the second-stage solid particles of the second-stage energy storage carrier layer in sequence, and therefore cascade storage of energy in the fluid can be achieved, and the energy storage efficiency is improved.

This utility model discloses a trapezoidal phase change plate with fins and a phase change heat storage and exchange airflow channel. The trapezoidal phase change plate has a W1 end and a W2 end, with the length of the W1 end being shorter than the length of the W2 end. Fins, including transverse and longitudinal fins, are arranged inside the trapezoidal phase change plate and are welded to the interior of the plate. In the direct ventilation channel, the W1 end of the phase change plate preferentially contacts the high-temperature hot air, and the phase change material at the W1 end melts preferentially compared to the W2 end. The phase change plate can adjust its slope ratio according to actual conditions to adapt to different cooling scenarios, effectively solving the problem of uneven melting of the phase change material leading to damage and resulting in low heat storage and release efficiency and unstable thermal performance.

The utility model relates to the field of energy storage, concretely relates to a kind of energy storage equipment, comprising: semiconductor refrigerator, heat transfer assembly, energy storage piece;The semiconductor refrigerator has refrigeration surface and heating surface, the heat transfer assembly is connected with the refrigeration surface of the semiconductor refrigerator and / or the heating surface of the semiconductor, and the heat transfer assembly is used to conduct the cold quantity and / or heat generated by the semiconductor refrigerator to the energy storage piece, to make the phase-change energy storage piece store cold or heat.By heat transfer assembly and heating surface or refrigeration surface connection, or in heating surface or refrigeration surface simultaneously setting heat transfer assembly, phase-change energy storage piece is set on heat transfer assembly, so that it can be realized heat conduction by heat transfer assembly, and then make energy storage equipment realize refrigeration or heating, or realize refrigeration and heating simultaneously, to improve the energy storage efficiency of energy storage equipment;Phase-change energy storage piece can also be applied to heating or refrigeration equipment, to make relevant equipment realize refrigeration or heating.

This utility model discloses a molten salt energy storage tank anti-crystallization layered stirring device in the field of energy storage equipment technology. It includes an energy storage tank body, with an inlet pipe fixedly connected to one side of the lower end of the tank body and an outlet pipe fixedly connected to one side of the upper end. Several placement discs are arranged inside the tank body. A first placement groove is fixedly formed on the outer upper end of each placement disc, and a second placement groove is fixedly formed on the inner upper end of each disc. A flow channel is fixedly formed at the lower end of each placement disc, and an overflow hole is fixedly formed at the upper end of the flow channel. This arrangement uses a layered placement method, and by introducing superheated steam, the superheated steam can fully contact each layer of molten salt, thereby rapidly heating the molten salt and storing energy, improving heating efficiency and accelerating energy storage efficiency.

This invention discloses a Ca2Nb2O7 glass-ceramic material with excellent energy storage efficiency and its preparation method. The method includes: Step 1, mixing Na2CO3, K2CO3, BaCO3, SrCO3, CaCO3, Bi2O3, TiO2, Nb2O5 and SiO2 evenly to obtain mixture A; Step 2, adding mixture A into a crucible preheated to 1100-1300℃, then raising the temperature to 1450℃ and holding it at that temperature to completely melt mixture A. The process continues until no more bubbles are generated, resulting in a melt. This melt is then poured into a mold preheated to 200°C, and after molding, product B is obtained. Step 3: Product B is transferred to an annealing furnace preheated to 500–600°C and held at that temperature. After cooling in the furnace, a glass sample is obtained. Step 4: The glass sample is placed in a muffle furnace and heated from room temperature to 800–1000°C at a rate of 5°C / min, and held at that temperature to crystallize the glass sample. After cooling in the furnace, Ca2Nb2O7 glass-ceramic material is obtained. This invention not only has a simple preparation process, but also produces Ca2Nb2O7 glass-ceramic with high breakdown strength and high energy storage efficiency.

The invention discloses a superparaelectric energy storage thin film material and a preparation method thereof.The superparaelectric energy storage thin film material comprises a substrate layer, a bottom electrode layer and a superlattice-solid solution dielectric layer which are stacked in sequence, the superlattice-solid solution dielectric layer comprises a superlattice layer, the superlattice layer is formed by sequentially and alternately stacking BaTiO3 layers and SrTiO3 layers, and the BaTiO3 layers and the SrTiO3 layers are stacked in sequence. A solid solution is distributed in the superlattice layer, and the solid solution is BiFeO3. The superparaelectric energy storage film material integrates the advantages of a multi-scale structure, has a slender ferroelectric hysteresis loop, and has excellent energy storage density and energy storage efficiency.