37results about How to "Reduce interface resistance" patented technology

The present application provides a diaphragm-free lithium ion battery. The battery comprises a positive electrode current collector, a positive electrode active material, a solid electrolyte, a solvent, a negative electrode active material, and a negative electrode current collector. The solid electrolyte is a solid porous organic polymer, which contains specific functional groups, including weakly coordinated anion groups, and the corresponding cation of the anion group is lithium ion. The porous polymer is a solid powder, which can act as a barrier between the positive electrode active material and the negative electrode active material, eliminating the need for a diaphragm and greatly improving the safety performance of the battery.

The invention discloses a preparation method of a standardized sheet for a thermoelectric test of minerals or mineral materials and alloys, belongs to the technical field of mineralogy, material science and prospecting prediction, and establishes a preparation process of a universal mineral or mineral material and alloy thermoelectric sheet. Covering all semiconductor mineral types or mineral material types such as pyrite, magnetite, graphite and sintered ore; accurate thickness control is achieved through a double-face polishing-loading sheet supporting structure, in-situ testing of the thermoelectricity of minerals or mineral materials and alloys is achieved, and the testing precision is improved; by adopting a conductive adhesive-copper plate composite structure, the interface resistance is reduced, the supporting strength is met, and the requirement of eliminating detection interference is met; residual colloid is thoroughly removed through ultrasonic cleaning, and the insulation effect is avoided; according to the standardized sheet, the hollow aminated phenolic resin nanosphere is used as a conductive substrate and is used for bonding a sample and a copper plate, the contact resistance between the sample and an electrode can be greatly reduced, and the accuracy of test data is improved.

This invention belongs to the field of battery material technology, and provides a single-lithium-ion conductive polymer solid electrolyte, its preparation method, and its application. The single-lithium-ion conductive polymer solid electrolyte of this invention uses P... 1,101 TFSI / Li-Nafion@LLZTO was added as a filler to the matrix resin to promote the addition of cationic Li in the lithium salt. + The migration of lithium ions improves the efficiency of lithium ion transport, which is beneficial for enhancing the contact between the electrode and the interface. It also results in high ionic conductivity and lithium ion transference number (ionic conductivity can reach up to 2.31 × 10⁻⁶). ‑4 S cm ‑1 With an ion transference number of up to 0.63, it exhibits high electrode / electrolyte interface stability, which can reduce interface resistance and contribute to the practical application and high performance of lithium-ion batteries based on SLCP solid electrolyte.

The invention discloses a system and a method for regulating and controlling the humidity of a cathode of an anode independent liquid supply AEM electrolytic bath. The system and the method are used for solving the problem of drying of a cathode film surface under high current density. The system comprises an electrolytic bath main body, a gas-liquid separation module and a humidification module. And an interface humidity adjusting layer is arranged in a cathode membrane electrode assembly of the electrolytic bath main body. Wet hydrogen produced by the cathode enters the gas-liquid separation module through the outlet to separate liquid water, and the liquid water is conveyed to the humidification module at the inlet end of the cathode and is converted into water vapor or fog drops to be mixed with hydrogen produced by the cathode to form humidified hydrogen backflow. Moisture in the humidified hydrogen is adsorbed by the interface humidifying layer and is uniformly diffused to a cathode film-electrode interface in the in-plane direction of the interface humidifying layer so as to maintain interface wetting. According to the method, independent moisture closed-loop circulation on the cathode side is constructed, so that self-regulation of the humidity of the cathode under the condition that external liquid supply is not needed is realized, the problems of moisture loss and non-uniform distribution caused by electroosmosis dragging are solved, and the operation stability and durability of the AEM electrolytic cell under high current density are remarkably improved.

The application provides a pore-forming agent for lithium ion batteries and a preparation method thereof, which comprises a wall material preparation step, a core material preparation step, a W / O type initial milk preparation step and a pore-forming agent for lithium ion batteries preparation step. The pore-forming agent preparation method is a new pore-forming agent synthesis route, which has the advantages of simple reaction steps, mild reaction conditions, high yield, low cost and environmental protection. The technology can accurately construct a uniform multi-level pore network by introducing the pore-forming agent into the electrode, significantly reduces the charge transmission impedance, effectively improves the fast charging capacity and high-rate discharge performance of the battery, greatly improves the electrode-electrolyte interface contact, and ensures the full use of the active material. The application also provides an application of the pore-forming agent for lithium ion batteries to lithium ion batteries. The application of the pore-forming agent for lithium ion batteries to the lithium ion batteries can improve ion conduction and improve the rate performance.

The application relates to a fluorinated two-dimensional inorganic nanofiller reinforced PEO-based solid-state polymer electrolyte and a preparation method and application thereof, and comprises the following steps: S1, obtaining fluorinated two-dimensional inorganic nanofillers by treating two-dimensional inorganic materials with a mixed gas of fluorine and nitrogen; S2, dissolving polyethylene oxide and a lithium salt in a polar solvent, then adding the fluorinated two-dimensional inorganic nanofillers obtained in the step S1, mixing, and obtaining a uniform mixed polymer solution; and S3, pouring the mixed polymer solution obtained in the step S2 on a polytetrafluoroethylene mold, vacuum drying, and obtaining the PEO-based solid-state polymer electrolyte. Compared with the prior art, the preparation process is simple and easy to operate, the ionic conductivity of the polymer electrolyte based on the fluorinated two-dimensional inorganic nanofillers can be improved, the electrochemical stability window can be widened, and the interface stability between the electrolyte and a lithium metal electrode can be improved.

The invention relates to a catalyst for hydrogen production through seawater electrolysis based on a metal ruthenium-doped copper nanowire composite structure and a synthesis method thereof, and belongs to the technical field of catalysis, the catalyst is composed of a copper nanowire skeleton derived from foamy copper and metal ruthenium clusters uniformly distributed on the surface of the copper nanowire skeleton; the method comprises the following steps: placing foamy copper in a solution containing sodium hydroxide and an oxidizing agent to generate a copper hydroxide nanowire; metal ruthenium is introduced by dipping in a solution containing ruthenium salt; and carrying out inert atmosphere heat treatment and electrochemical reduction to obtain the ruthenium-cluster-loaded copper nanowire composite catalyst. The fine regulation and control of the structure and components of the catalyst are realized by adjusting the concentration of the reaction solution, the dipping time and the treatment conditions. The electrocatalyst shows excellent hydrogen evolution activity and long-term stability under the acidic seawater electrolysis condition, the problems that a nickel-based current collector is prone to corrosion in an acidic medium and a traditional platinum-based catalyst is prone to inactivation in natural seawater are effectively solved, and a new technical scheme is provided for efficient and stable seawater electrolysis hydrogen production.

The present application relates to the technical field of lithium ion solid-state battery, in particular to a three-dimensional polymer modified interlayer for lithium ion solid-state battery and a preparation method thereof, comprising the following steps: adding polyacrylonitrile into N, N-dimethylformamide and stirring until completely dissolved, then adding modified polyamide acid-phosphonate copolymer and continuing to stir to obtain an electrospinning precursor solution, and electrospinning the electrospinning precursor solution to obtain a composite nanofiber membrane. The present application uses indium-containing heterocyclic modified diamine as the core monomer of polyamide acid-phosphonate copolymer, and the excellent lithium affinity activity of the core monomer can reduce the lithium deposition nucleation overpotential, promote the lithium dense dendrite-free deposition, and the indium-containing heterocyclic groups are uniformly dispersed in the three-dimensional framework through the crosslinking network of the modified polyamide acid-phosphonate copolymer, so that the contact interface between the interlayer and lithium metal forms a global uniform lithium affinity site, and the lithium atom concentrated deposition caused by the local lithium affinity activity difference is avoided.

The invention provides an in-situ polymerized lithium iron phosphate-bright aluminum foil composite positive electrode and a preparation method thereof, and relates to the field of lithium batteries. According to the positive electrode slurry, the functional additive A and the functional additive B are adopted for compatibility, and the additive B is a compound of which the molecular structure simultaneously contains polymerizable carbon double bonds and phosphate groups and is used for linking an inorganic surface and an organic polymer; the functional additive A and the functional additive B are compatible to construct a three-dimensional stable chemical bonding network, and a dynamic gradient conductive interface layer with high conductivity and strong binding power is constructed on the surface of the optical aluminum foil in situ, so that the risk that an active material falls off from a current collector in the later period of circulation is greatly reduced, and the interface resistance is remarkably reduced; the mechanical stability of the pole piece is remarkably improved (the interface bonding strength can still be kept at 90% after 1000 times of circulation), and the cycle life is long.

This invention relates to a method for preparing a vanadium selenide / vanadium oxide heterojunction photo-assisted zinc-ion battery, belonging to the technical field of vanadium selenide / vanadium oxide heterojunction photo-assisted electrochemical energy storage and zinc-ion battery. The method includes the following steps: mixing a selenium source solution and a vanadium source solution to obtain a reaction precursor solution; subjecting the reaction precursor solution to a hydrothermal reaction and washing to obtain vanadium selenide material; annealing the vanadium selenide material to form a vanadium oxide layer on its surface, obtaining a vanadium selenide / vanadium oxide heterojunction composite material; mixing the vanadium selenide / vanadium oxide heterojunction composite material, a conductive agent, and a binder, adding a solvent to prepare a slurry, coating the slurry onto the surface of a current collector, and drying to obtain a photocathode. The material and its application system described in this invention exhibit good specific capacity, rate performance, and cycle stability, and demonstrate good energy storage performance under illumination conditions; this invention is beneficial for further reducing electrode polarization and promoting the synergistic enhancement of electron transport and zinc-ion storage.

This invention relates to the field of batteries, and more particularly to a positive electrode material, a method for preparing the same, and a battery. The positive electrode material includes a core and a coating layer covering at least a portion of the surface of the core; the core has the general chemical formula Na3V. 1.925 M 0.075 (PO4)3, where M is a transition metal element; the coating layer includes carbon materials, which include nitrogen-doped amorphous carbon and carbon nanotubes introduced by acidified carbon nanotubes. The cathode material provided by this invention can significantly improve the low-temperature, high-rate, and long-cycle electrochemical performance. Thanks to the synergistic effect of structural optimization and interface regulation, the polarization of the material is significantly reduced under low-temperature and high-current charge-discharge conditions, and the rate performance and cycle stability are significantly improved, enhancing the practicality and reliability of sodium-ion batteries in large-scale energy storage and wide-temperature applications.

The utility model belongs to the energy -conserving and carbon -reducing electrolytic aluminium anode technical field, especially relates to a current -sharing composite electrolytic aluminium anode structure, and anode structure includes aluminium alloy guide rod, is located aluminium alloy guide rod bottom and its fixed connection's section is the composite transition structure of convex, and the composite transition structure is fixedly connected with carbon top through the graphene / copper composite expansion connecting column of its bottom, the utility model discloses the addition of graphene / copper composite board has reduced the interface resistance between expansion connecting structure and carbon, and when anode is installed on electrolytic cell, anode overall temperature rises, graphene / copper composite expansion connecting structure is heated, produces the thermal expansion outward, and the contact resistance with carbon is also smaller.

The invention relates to the technical field of batteries, and discloses a sodium battery positive electrode material with a heterostructure and a preparation method and application thereof.The preparation method comprises the steps that 1, a nickel source, a manganese source and a first solvent are subjected to first mixing, and a solution A is obtained; carrying out second mixing on a niobium source and a second solvent to obtain a solution B; (2) under a protective atmosphere, carrying out a co-precipitation reaction on the solution A, the solution B, a precipitator solution and a complexing agent solution to obtain a first precursor material; (3) performing third mixing on the first precursor material, a lithium source and a sodium source, and performing first heat treatment to obtain a second precursor material; and (4) carrying out second heat treatment on the second precursor material to obtain the sodium battery positive electrode material with the heterostructure. According to the preparation method provided by the invention, a coprecipitation reaction is combined with a two-time heat treatment process, and the cathode material with a heterostructure, which is uniform in distribution and stable in structure, is prepared, so that the electrochemical performance of a battery is improved.

The invention belongs to the technical field of graphene composite material preparation, and particularly relates to a high-conductivity graphene / copper composite cable and a preparation method thereof. The preparation method comprises the following steps: S1, carrying out surface cleaning on a copper wire substrate by adopting an argon ion beam at a preset grazing incidence angle to obtain a clean copper wire substrate; s2, performing surface stepped reconstruction on the clean copper wire substrate to obtain a surface reconstructed copper wire substrate; s3, arranging the surface-reconstructed copper wire matrix in a preset crystal orientation, performing graphene oriented growth treatment to obtain a composite wire, and performing graphene oriented growth treatment by adopting a gas-phase pulse chemical vapor deposition method or a liquid-phase carbon source dipping-high-temperature pyrolysis method; s4, the composite wire is subjected to controlled cooling by applying axial tension in an inert atmosphere, and the composite wire with a stable structure is obtained; and S5, guiding and twisting the composite wire with the stable structure to obtain the high-conductivity graphene / copper composite cable. The high-conductivity graphene / copper composite cable has excellent conductivity.

The invention provides a preparation method and application of iron phosphate dihydrate and lithium iron phosphate, and the preparation method of iron phosphate dihydrate comprises the following steps: (a) mixing a phosphorus source solution with a first iron source, adding an oxidizing agent under a heating condition, and carrying out a reaction to form a primary crystal nucleus dispersion liquid; (b) simultaneously adding a second iron source into the primary crystal nucleus dispersion liquid to react with a phosphoric acid solution, and aging the obtained slurry to obtain iron phosphate dihydrate; wherein the first iron source comprises a ferrous sulfate solution, and the second iron source comprises a ferric chloride solution; the concentration of Cl <-> in the slurry in the step (b) is 0.2-0.4 mol / L, and the pH value is 0.25-1.0. The iron phosphate dehydrate prepared by the method is used as a precursor for preparing lithium iron phosphate, a high-temperature dehydration step is canceled, and an optimized mixing and sintering process is combined, so that high-performance and high-compaction lithium iron phosphate can be prepared in a short process at low cost.

The application relates to a pole piece and a battery cell, and relates to the technical field of batteries.The pole piece comprises a current collector, a first conductive layer and an active body.The current collector is provided with a plurality of first holes.The first conductive layer comprises a first conductive part and a second conductive part.The first conductive part is arranged on at least one side of the current collector, and the second conductive part is filled into the plurality of first holes.The second conductive part is electrically connected with the first conductive part.The active body is arranged on the side of the first conductive part away from the current collector.The pole piece and the battery cell can reduce the interface resistance, improve the problem that the transmission path of electrons is blocked, and improve the transmission efficiency of the electrons.

The application discloses a preparation method of an ionic hydrogel-based humidity generator for efficient power generation and self-powered sensing. By preparing an ionic hydrogel prepolymer solution rich in active functional groups, a pre-polymer hydrogel is formed by short-time initial ultraviolet irradiation. After the pre-polymer hydrogel is transferred to the surface of an electrode, secondary ultraviolet irradiation is performed to enable chemical bonding and interpenetrating network structure between the hydrogel and the electrode. Finally, an active metal top electrode is attached. Through the synergistic design of the two-step curing method and the active electrode, on the one hand, the firm interface combination of the hydrogel and the electrode is realized, and the contact impedance is significantly reduced; on the other hand, the additional output is generated by the redox reaction between the active electrode and the hydrogel, thereby greatly improving the electrical output performance of the device. The obtained generator has excellent electrical output performance in a wide temperature and humidity range, and can be integrated for power supply and used as a high-sensitivity self-powered sensor, and has application prospects in the field of flexible wearable devices.

The application discloses an interface conductive type carbon-coated slurry and a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The carbon-coated slurry is composed of a conductive agent, a binder, a pH regulator, a solvent, a wetting agent and a functional additive. The functional additive is a mixture of one or more of nano metals, organic metal compounds and organic acid salts. The functional additive chemically reacts with insulating impurities on the surface of an aluminum foil to generate a new phase with high conductivity, such as nano metal iron, and to construct a three-dimensional conductive network. The carbon-coated current collector prepared by using the carbon-coated slurry has good performance. The application does not require complex pretreatment, is compatible with processes, is low in cost, can significantly improve the interface conductive performance, can significantly improve the rate and cycle life of the battery, and is suitable for industrial large-scale production.

The invention discloses a pressurization pre-charging system of a soft package battery. The pressurization pre-charging system comprises a controller, a pressure container, an air pressure regulation and control unit, a pre-charging unit and a sensing monitoring unit, the pressure container is provided with an air inlet and an air outlet, the pressure container is used for placing a soft package battery, and the air pressure regulation and control unit is electrically connected with the air inlet and the air outlet; the pre-charging unit is configured to pre-charge the soft package battery; the sensing monitoring unit is used for monitoring the pressure in the pressure container; the air pressure regulation and control unit is used for controlling the pressure in the pressure container to be uniform by controlling opening and closing of the air inlet and the air outlet; the controller is electrically connected with the air pressure regulation and control unit, the pre-charging unit and the sensing monitoring unit, and the controller is configured to control the pre-charging unit to pre-charge the soft package motor; and the air pressure regulation and control unit is controlled to work according to monitoring data of the sensing monitoring unit.

This invention provides a polymer electrolyte, its preparation method, and its application. The raw materials of the polymer electrolyte, by mass, include the following components: 8-12 parts of an olefin polymer, 4-8 parts of a sodium salt, 0.4-1.2 parts of hydrophobic fumed silica (SiO2), 7-30 parts of a fluorinated small-molecule plasticizer, and 35-85 parts of a solvent. The polymer electrolyte of this invention uses a fluorinated small-molecule plasticizer with weak solvation ability as the plasticizer in the electrolyte, which improves the mechanical properties of the electrolyte membrane. Simultaneously, it forms a competitive coordination effect with the residual solvent with strong solvation ability, which is beneficial for inhibiting the corrosion effect of sodium salt on the current collector. The hydrophobic fumed silica filler reduces the crystallinity of the polymer matrix and enhances the mobility of the polymer matrix segments, thereby improving the ionic conductivity.

The invention provides a preparation method of an ultrathin porous CoFeMoO4-based nanosheet electrocatalyst and an application of the ultrathin porous CoFeMoO4-based nanosheet electrocatalyst in a photovoltaic-water electrolysis hydrogen production system. Through solvent heat treatment and surface engineering, the Fe element is introduced, and meanwhile, the ultrathin nanosheet catalyst with a mesoporous structure is constructed, so that the ultrathin nanosheet catalyst shows excellent oxygen evolution reaction activity and stability. Co and Fe elements in the catalyst have moderate adsorbability to oxygen evolution reaction intermediates, the specific surface area, the activity of active sites and the ion / electron transmission rate of the catalyst are improved through multiple strategies such as electronic engineering and structural engineering, and overpotential and energy loss are remarkably reduced. A photovoltaic system and a water electrolysis system are coupled, a commercial monocrystalline silicon thin film cell is used as the only energy input, and the catalyst realizes high solar energy-hydrogen energy conversion efficiency and stability. The technical synthesis steps are simple, no precious metal participates in, efficient and stable green hydrogen energy production is achieved, and clean fuel can be synchronously generated under the mild condition through solar energy driving.

This invention relates to a lithium iron phosphate composite electrode material and its preparation method, belonging to the field of electrode material technology. The preparation method of this invention significantly improves the electrochemical performance of the material through a wet-mixing precursor, modified carbon nanotube composite, and double-layer carbon coating process. The modified carbon nanotubes are treated with melamine, potassium hydroxide, and boric acid to achieve nitrogen / boron co-doping and surface functionalization, constructing efficient electron transport channels and shortening the lithium-ion diffusion path through a microporous structure; their high aspect ratio and improved graphitization effectively alleviate charge-discharge volume expansion and ensure high-temperature structural stability. The double-layer carbon coating consists of a polydopamine inner layer and a glucose-derived carbon outer layer. The inner layer strengthens the interface bonding through chemical bonding and guides uniform lithium-ion diffusion, while the highly conductive outer carbon layer provides a fast electron transport channel and mechanical protection, synergistically optimizing ion / electron transport efficiency.

The invention provides a preparation method for improving the compaction density of regenerated lithium iron phosphate and a product application. Aiming at the problem that the compaction density of the retired lithium iron phosphate material is low due to particle mechanical property degradation, particle size distribution imbalance and conductive structure damage, a cooperative regulation and control mechanism of body strengthening, interface plasticizing and conductive reconstruction is constructed, and a low-cycle atomic layer deposition and fused salt treatment combined process is adopted, so that the compaction density of the retired lithium iron phosphate material is improved. And the structure integrity, the interface compactness and the conductive network of the regenerated lithium iron phosphate particles are subjected to system reconstruction, so that the stacking efficiency and the compaction performance of the material are remarkably improved. The method is simple in technological process, low in energy consumption, capable of being directly integrated to an existing regeneration production line, suitable for lithium iron phosphate materials with different degradation degrees, environmentally friendly and high in resource utilization rate due to the adoption of a closed molten salt circulation system. The treated regenerated lithium iron phosphate material can meet the application requirements of high-compaction-density and high-energy-density batteries, and has a good industrialization prospect.

The invention provides a ferronickel-based self-supporting oxygen evolution electrode and a preparation method thereof. The preparation method comprises the following steps: S1, adding ferric salt, nickel salt and an additive into a solvent to obtain a metal seed solution; s2, an electrode substrate is placed in the metal seed solution, the surface of the electrode substrate is heated at the initial pH at the heating rate of 0.7-2.5 DEG C / min to form an iron-rich phase, when the pH reaches 6.5-7.5, a nickel-based transition layer is formed on the surface of the iron-rich phase at the heating rate of 0.1-0.7 DEG C / min, and when the pH reaches 7.5-8, the nickel-based transition layer is formed on the surface of the iron-rich phase at the heating rate of 0.1-0.7 DEG C / min; and stopping heating and carrying out heat preservation reaction to form the ferro-nickel layered double hydroxide on the surface of the nickel-based transition layer. The controllable preparation of the high-performance self-supporting electrode is realized by accurately controlling the hydrothermal reaction process, the pores of the three-layer structure prepared on the surface of the electrode substrate are sequentially increased from inside to outside, the discharge of reactant bodies and products is promoted, compared with the prior art, the ion diffusion path is shortened by the three-layer graded pore channels, the concentration polarization is obviously reduced, and the performance of the electrode is improved. The catalytic activity and the service life are both considered.

This invention provides a resin-based hard carbon material, its preparation method, and a battery. The resin-based hard carbon material has a porous structure, including micropores and ultramicropores; the pore size distribution of the ultramicropores is <0.7 nm, and the pore size distribution of the micropores is 0.7–2 nm (excluding 2 nm); zinc is also attached to the pore walls. The resin-based hard carbon provided by this invention has narrow, uniform, and dense pores, possessing both micropores and abundant ultramicropores, which is beneficial for lithium-ion storage. Furthermore, the ultramicropores isolate the entry of electrolyte, avoiding excessive side reactions and irreversible capacity buildup while achieving lithium-ion storage. It also retains the high-rate performance characteristics of hard carbon materials. The zinc in the pores also has a lithiophilic effect, further attracting lithium ions into the pores, thus achieving the goal of improving the capacity and first-time efficiency of hard carbon materials while maintaining high-rate performance.

The invention discloses a tubular integrated membrane electrode assembly for a PEM electrolytic bath and a preparation method thereof, and relates to the technical field of membrane electrode preparation, and the preparation method comprises the following steps: placing a polyacrylonitrile fiber membrane in a Nafion solution, dipping, adding palladium-loaded UiO-66-NH2, carrying out ultrasonic dipping, and drying to obtain a composite proton exchange membrane; mixing ethanol, deionized water and a Nafion solution, respectively adding the platinum-loaded UiO-66-NH2 and the iridium-loaded UiO-66-NH2, and carrying out ultrasonic treatment to obtain a cathode catalyst slurry and an anode catalyst slurry; and respectively spraying the cathode catalyst slurry and the anode catalyst slurry to two sides of the pretreated composite proton exchange membrane under negative pressure, placing the pretreated composite proton exchange membrane between two gas diffusion layers, and carrying out hot pressing on a tubular mold to obtain the tubular integrated membrane electrode.

The invention discloses a lithium iron phosphate positive electrode material and a preparation method thereof. The positive electrode material comprises a lithium iron phosphate matrix and a coated carbon layer, the lithium iron phosphate matrix is lithium iron phosphate particles prepared from iron oxide red as a raw material, and the carbon layer is a nitrogen-doped coated carbon layer formed by pyrolysis of amine-modified alkyl glucoside. The preparation method comprises the following steps: (1) taking iron oxide red as an iron source, adding a phosphorus source and a lithium source to prepare precursor powder, (2) respectively sintering the precursor powder under a first sintering condition and a second sintering condition to obtain lithium iron phosphate matrixes 1 and 2, and (3) mixing the lithium iron phosphate matrixes 1 and 2 with amine modified alkyl glucoside and water, respectively sanding until D50 is 1.6-2.5 microns and 0.2-0.5 microns, and drying to obtain the lithium iron phosphate composite material. And mixing the obtained lithium iron phosphate matrix sanding slurry according to a ratio, spraying, sintering and crushing. The process complexity and cost are reduced, the compaction of the positive electrode material powder is improved, and the 1C capacity is improved.

The utility model relates to a kind of electrode structure of supercapacitor, to solve the problem of insufficient electrode and electrolyte interface contact, big resistance. The structure includes electrode main body, its one side is sequentially provided with porous layer, intermediate layer and electrolyte reservoir. The porosity of porous layer is not less than 50%, aperture range is 1-100nm, can significantly increase the actual contact area of electrode and electrolyte, reduce interface resistance. Intermediate layer is conductive polymer layer, can relieve interface stress, improve interface stability, while optimizing electrode surface characteristics, so that electrolyte is more easily spread and soak. The cavity volume of electrolyte reservoir accounts for 30%-40% of total volume, ensure sufficient supply of electrolyte. The device improves ion transport efficiency, reduces ion diffusion resistance, enhances electrode mechanical strength, prolongs the service life of supercapacitor, improves electrochemical performance through the synergistic effect of porous layer, intermediate layer and electrolyte reservoir.

This invention discloses a multilayer synergistic composite membrane for alkaline water electrolysis to produce hydrogen, its preparation method, and its application, belonging to the field of water electrolysis hydrogen production technology. The membrane comprises, from bottom to top, a base support layer, an intermediate functional layer, and a surface hydrophilic layer; wherein the base support layer is a hydrophilically treated polyphenylene sulfide nonwoven fabric, the intermediate functional layer is a polysulfone / ZrO2-TiO2 heterostructure composite material, and the surface hydrophilic layer is a chitosan-polyethyleneimine dual-network hydrogel. This membrane features low surface resistivity, high gas barrier properties, excellent mechanical strength, and long-term stability, making it particularly suitable for alkaline water electrolysis to produce hydrogen under high current densities.

Provided are a solid electrolyte (19), an ion conductor (10), a sheet (15), an electrode (12), a diaphragm (25), and an energy storage device (11) capable of reducing interfacial resistance. The solid electrolyte has a garnet-type crystal structure containing Li, La, Zr, and O. In X-ray photoelectron spectroscopy, when the area intensity of the first peak corresponding to the Li-O bond in the O1s energy spectrum detected by irradiation with monochromatic AlKα rays is set as the first intensity, the area intensity of the peak existing at a position where the bonding energy is greater than that of the first peak is set as the second intensity, the area intensity of the third peak corresponding to the Li-O bond in the O1s energy spectrum detected by irradiation with monochromatic CrKα rays is set as the third intensity, and the area intensity of the peak existing at a position where the bonding energy is greater than that of the third peak is set as the fourth intensity, the second intensity is greater than the first intensity, and the fourth intensity is less than the third intensity.