372 results about "Energy materials" patented technology

The invention belongs to the technical field of electrochemistry and energy materials, and particularly relates to preparation and application of a high-performance asphalt-based porous carbon material. The preparation method sequentially comprises the following steps of crushing, heat treatment, pre-oxidation, airflow crushing, carbonization, activation, acid washing, water washing and drying. Compared with the prior art, the high-performance asphalt-based porous carbon material at least has the beneficial effects that the high-performance asphalt-based porous carbon material does not use raw materials such as carbon nanotubes and graphene with relatively high cost on the premise of ensuring sufficient specific surface area and sufficient pore volume value, so that the preparation method has outstanding advantages of simplicity and economy.

The invention discloses a battery material combination method and device and a computer storage medium, and relates to the technical field of new energy materials, and the method comprises the steps: generating one or more groups of candidate material combinations based on battery material data; extracting attribute features of the candidate material combination, and converting the attribute features into feature vectors; and inputting the feature vector into a pre-trained prediction model to obtain a performance prediction result of the candidate material combination. According to the method, the candidate material combination is generated, and the performance of the candidate material combination is predicted by using the prediction model, so that efficient screening and safety performance prediction of the battery material combination are realized, the research and development efficiency of the battery material is remarkably improved, and meanwhile, the selection range of the battery material combination is also expanded.

The invention provides a large-area coated lithium manganate positive electrode material and a preparation method thereof, and belongs to the technical field of energy materials, and the large-area coated lithium manganate positive electrode material comprises a lithium manganate positive electrode material body subjected to grain boundary pretreatment and a coating layer coating the surface of the lithium manganate positive electrode material body. The general molecular formula of the lithium manganate positive electrode material body subjected to grain boundary pretreatment is Li < 1 + a > Mn < 2-b > MbO4, M is a doping element, a is more than or equal to-0.1 and less than or equal to 0.3, and b is more than or equal to 0 and less than or equal to 0.3; the surface coating layer comprises an M'coating element. The lithium manganate positive electrode material body subjected to grain boundary pretreatment can realize large-area coating, and the lithium manganate positive electrode material subjected to special grain boundary pretreatment and large-area coating has excellent structural stability, so that corrosion of an electrolyte to lithium manganate is relieved, Mn dissolution at a high temperature is inhibited, and the lithium manganate positive electrode material has good electrochemical performance. Therefore, the lithium manganate positive electrode material has excellent high-temperature circulation and high-temperature storage performance, and the method is simple in process and can be implemented and popularized.

The invention discloses a carbon-coated lithium iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of electrochemical energy materials. The preparation method comprises the following steps: stirring a binder and 80% of a solvent in parts by weight at 50-55 DEG C, adding a conductive agent, and stirring at the temperature lower than 40 DEG C for 2 hours; adding carbon-coated lithium iron phosphate, stirring, adding 20% of a solvent, and stirring; vacuumizing, maintaining the pressure, breaking the vacuum again, vacuumizing again, stirring, and testing the viscosity to obtain positive electrode slurry; and coating on an aluminum foil, and rolling to obtain the positive electrode material. The interior of the binder is of a firm three-dimensional network cross-linked structure, and meanwhile, the binder contains a benzotriazole structure and rich hydroxyl groups, so that the binder is high in adhesive force, and the non-polar part of the binder is beneficial to wetting an electrode by an electrolyte; and the binder and other raw materials have good compatibility, synergistically play a role, and jointly endow the carbon-coated lithium iron phosphate positive electrode material with excellent and stable cycle life, conductivity and the like, so that the carbon-coated lithium iron phosphate positive electrode material has excellent comprehensive performance and is safer to use.

The invention relates to a carbon footprint management method and system of a lithium battery, electronic equipment and a storage medium, and belongs to the technical field of carbon footprint management, and the method comprises the steps: obtaining first carbon footprint data of each link of the whole life cycle of the lithium battery; the first carbon footprint data comprises energy used in each link, materials input and output in each link, wastes generated in each link, metering equipment of the energy material wastes, process equipment used in each link, basic information of the process equipment, carbon emission factors of each link, test equipment of the carbon emission factors, a test environment and a test method; carbon emissions of all links and a calculation method of the carbon emissions; generating a carbon footprint report according to the first carbon footprint data; and uploading the first carbon footprint data and the carbon footprint report to a block chain. According to the invention, block chain storage is carried out on the measurement information of each link, the carbon emission factor and the test / calculation process of the carbon emission, so that the credibility of the carbon footprint is ensured.

The invention provides a lithium manganate precursor with a crystal face induction effect, a preparation method of the lithium manganate precursor, a positive electrode material and a lithium battery, and belongs to the technical field of energy materials, the lithium manganate precursor can play a crystal face induction role in the subsequent lithium mixing sintering process, the lithium manganate precursor is spherical-particle manganous-manganic oxide, the particle size D50 is 3-15 microns, and the particle size D50 is 3-15 microns. The primary particles are uniform in size. The core advantage of the method is that synchronous and uniform doping of the element M and the element M'is realized at the precursor stage through a coprecipitation method. The co-precipitation doping technology not only ensures the atomic-scale uniform distribution of doping elements in manganous-manganic oxide, but also effectively stabilizes the crystal structure of the lithium manganate positive electrode material by utilizing the synergistic effect of the elements in the subsequent sintering process, and realizes the selective induced growth of the crystal face. The unique crystal face induction effect has significant contribution to improvement of the electrochemical performance, including cycling stability, rate capability and safety, of the positive electrode material.

The invention relates to the technical field of novel energy materials, in particular to a photo-thermal driving shape memory type heat storage and temperature regulation phase change material and a preparation method and application thereof, and the photo-thermal driving shape memory type heat storage and temperature regulation phase change material comprises a polyurethane phase change material and a photo-thermal conversion material; the polyurethane phase change material is prepared from polyether type polyol, polyester type polyol, isocyanate and small molecule polyol; wherein the molar ratio of the polyether type polyol to the polyester type polyol is 1: (1 to 1000), and the molecular weight of the polyether type polyol is 10000 to 900000; the photothermal conversion material comprises one or more of carbon-based materials such as graphene, graphene oxide and a carbon nano tube. The phase change material has the advantages of high enthalpy value, high strength, photothermal conversion performance, good flexibility and reversible shape memorability, simple preparation method and low cost, and can be widely used in the fields of artificial muscle fibers, heat storage and temperature regulation intelligent textiles, heat management and the like.

The invention relates to a carbon nanofiber loaded Cu nanoparticle composite material prepared by combining an electrostatic spinning method and a high-temperature in-situ reduction reaction and used as a high-cycle-stability zinc negative electrode coating of an aqueous zinc ion battery. Belongs to the technical field of new energy materials. The prepared composite electrode material is regular in structure and excellent in electrochemical performance. Cu is introduced through a high-temperature in-situ reduction reaction. And after the Cu is loaded with the carbon nanofibers, not only is the slow dynamic process of the bare zinc electrode improved, but also the uniform deposition of Zn < 2 + > on the zinc negative electrode in the embedding / separating process is induced.

The invention provides a precast beam field production process carbon emission calculation method, and relates to the technical field of carbon emission calculation, and the method comprises the steps: combing construction production carbon emission sources, and determining a carbon emission quantification accepting and rejecting criterion based on the complexity, importance and contribution degree of the carbon emission sources; determining a time boundary, a space boundary and an emission source boundary; constructing a prefabricated beam field construction production carbon emission chemical index system comprising a first-level index, a second-level index and a third-level index; analyzing internal characteristics and adaptive scenes of existing energy and material carbon emission factors, correcting and optimizing carbon emission factors of fossil energy, electric power and outsourcing materials by combining an energy structure, regional electric power characteristics and precast beam field building material use characteristics, and establishing an emission factor library; calculating the total carbon emission in the production process of the precast beam field by adopting an emission factor method; the total carbon emission is corrected; the data quality can be improved, and the calculation accuracy is guaranteed; accounting benchmarks are unified, and the problem of result difference is solved.

The invention discloses a method for preparing a hard carbon negative electrode material, the hard carbon negative electrode material and a sodium-ion battery, belongs to the technical field of energy materials, and solves the problems that the existing hard carbon negative electrode material is complex in microstructure and indefinite in sodium storage mechanism, and the traditional preparation method cannot effectively increase the internal closed pore volume, so that the high-platform capacity development is limited, and the sodium-ion battery is difficult to use. And the improvement of the energy density of the sodium-ion battery is restricted. Comprising the following steps: drying and crushing coconut shells; pre-carbonizing the treated coconut shell to obtain a carbonized material; uniformly mixing the carbonized material with an activating agent to obtain a mixed material; carrying out an activation reaction to obtain a biomass-based porous carbon mixed material; washing until the solution is neutral; carrying out activation reaction on the washed material to obtain the biomass-based porous carbon material with high specific surface area and high microporosity; and carrying out variable-temperature chemical vapor deposition reaction to obtain the hard carbon negative electrode material. The method is suitable for a large-scale preparation scene of the hard carbon negative electrode material with abundant closed pores.

The invention discloses a polyarylamine hole transport material, a synthesis method thereof and a perovskite solar cell, and belongs to the field of chemical and energy materials. The synthesis method comprises the following steps: mixing arylamine, aryl halide, a palladium catalyst, a phosphine ligand and organic alkali, carrying out a reflux reaction, and then adding an end-capping reagent to terminate the reaction; and settling the product in methanol, carrying out suction filtration to obtain a solid, and then carrying out Soxhlet extraction. By adjusting the activity of the reaction intermediate, two continuous C-N cross-coupling catalytic cycles are achieved, in the first catalytic cycle, high-reaction-activity arylamine and aromatic halide are coupled to generate a low-activity bifunctional secondary arylamine intermediate, the intermediate is kept in a dormant state in the first catalytic cycle, and after primary arylamine is completely consumed, the intermediate is separated from the primary arylamine, and the secondary arylamine is separated from the primary arylamine. And the secondary arylamine intermediate and the aromatic halide are subjected to coupling polymerization, so that accurate synthesis of a series of polyarylamine with narrow molecular weight distribution is realized. The polyarylamine can be used as a hole transport material to construct a perovskite solar cell, adjust interface hole extraction and promote perovskite growth.

The invention belongs to the technical field of energy materials, relates to a thermoelectric material, and particularly provides a high-performance n-type PbS-based medium-entropy thermoelectric material and a preparation method thereof, which are used for solving the problem of poor thermoelectric performance of a PbS-based material in the practical application process of the thermoelectric field. The medium-entropy thermoelectric material PbS (1-x) Sex-yTey is obtained by performing solid solution on a designed amount of Se element and Te element in a PbS-based material, x is more than or equal to 0.48 and less than or equal to 0.5, y is more than or equal to 0.15 and less than or equal to 0.25, and the thermal conductivity of the PbS-based material is effectively reduced; the preparation method comprises the following steps: preparing a medium-entropy thermoelectric material PbS (1-x) Sex-yTey, performing gap doping on the medium-entropy thermoelectric material PbS (1-x) Sex-yTey with a designed amount of Cu element to optimize the carrier concentration, and finally obtaining the high-performance n-type PbS-based medium-entropy thermoelectric material, the room-temperature ZT value and the average ZT value of the material are up to 0.53 and 1.08 respectively, and the material has excellent thermoelectric performance; meanwhile, the high-performance n-type PbS-based medium-entropy thermoelectric material has the obvious advantage of low cost, and wide application of the thermoelectric technology is promoted.

The invention discloses a high-porosity organic salt framework confinement nano-metal hydrogen storage material and a preparation method thereof, and belongs to the field of new energy materials. The material takes a carboxylic acid organic salt framework (POS-1) as a carrier, the specific surface area of the material is 1520 m < 2 > / g, the pore size distribution is 1.8-2.5 nm, nano Mg / Ni particles (the average particle size is 3.2 + / -0.5 nm) are confined in pores through a gradient loading and in-situ reduction technology, and an atomic layer deposition (ALD) is adopted to modify a Pd nano catalyst (the loading capacity is 0.48 wt%). The reversible hydrogen storage capacity of the material at room temperature reaches 5.8 wt%, the hydrogen desorption temperature is lower than 80 DEG C, and the capacity retention ratio is larger than or equal to 92% after 100 times of circulation. The preparation method comprises the steps of organic salt framework synthesis, metal precursor gradient loading, low-temperature reduction (250 DEG C), hydrogenation activation and the like, the process is simple and controllable, and the catalyst is suitable for scenes such as a vehicle-mounted hydrogen storage system.

The invention relates to the field of energy materials and secondary batteries, and discloses a preparation method of an in-situ interface residual alkali conversion stable secondary battery positive electrode material. The chemical expression is AMxTMO2, and the material is of a polymer / layered structure. Wherein x is more than 0.5 and is a layered oxide positive electrode material; aM is one or more of Li and Na; and TM is one or more of transition metal elements of Ni, Co, Mn, Fe, Cu, Zn, Cr and Ti. The process comprises the steps of precursor material preparation, positive electrode material sintering, coating treatment and low-temperature calcination. Wherein the coating treatment comprises the following steps: 1, inorganic fluoride treatment; and 2, organic solvent treatment. According to the process disclosed by the invention, residual alkali on the surface of the layered oxide positive electrode material is subjected to in-situ conversion to form a heteroepitaxial organic polymer coating, so that the layered oxide positive electrode material with a stable interface for the secondary battery is obtained. The process is simple and controllable, the air stability of the positive electrode material after in-situ conversion can be effectively improved, and the actual production application of the layered oxide positive electrode material is promoted.

The invention discloses a semi-solid sodium-ion battery and a sodium-ion battery additive, and belongs to the technical field of energy materials, the general formula of the semi-solid sodium-ion battery is Na < x > (TM) O < 2 >, TM is one or a combination of transition metal ions, and x is more than or equal to 0.44 and less than or equal to 1.0; the semi-solid sodium-ion battery contains a sodium-ion battery additive, and the sodium-ion battery additive is a sulfide synthesized from a doped metal organic framework compound in a reducing atmosphere. The semi-solid sodium ion battery is prepared by adopting a method of combining sulfide and a small amount of liquid electrolyte, the sulfide is made of a loose and porous material, and holes are filled with the liquid electrolyte, so that the specific surface area and sodium ion transmission channels are increased, and the ionic conductivity is further increased. A reinforcing framework is introduced into the electrode plate, so that the mechanical strength of the electrode plate is improved, and the safety performance of the semi-solid sodium-ion battery is further improved.

The invention belongs to the technical field of energy materials, and provides a multi-functional-layer lithium manganate positive electrode material and a preparation method thereof and a lithium battery, the multi-functional-layer lithium manganate positive electrode material comprises a core body and a coating layer, the core body sequentially comprises a bulk-phase-doped lithium manganate matrix, an induction doping layer and a modification doping layer from inside to outside, the chemical general formula of the core body is Li < 1 + a > Mn < 2-b-c-d > M R < c > X < d > O < 4-e > Z < e >, bulk phase doping elements of the matrix are M and Z, a crystal face induction element is X, and a modification doping element is R; the coating layer is a compound comprising a coating element M '; a supported crystal face inducer is also adopted for further inhibiting the growth of the crystal face (111) and reducing the area of the crystal face (111) so as to form the positive electrode material of a polyhedral spinel crystal structure comprising at least 26 crystal faces, and the crystal face inducer comprises a phosphorus-containing compound, a boron-containing compound or at least + 5 valence metal salt; the Mn dissolution reaction is reduced, and the electrochemical performance of the lithium manganate is improved.

The invention discloses a high-entropy P2-O3 composite system sodium ion positive electrode material, a preparation method thereof and a sodium battery, and belongs to a new energy material technology. The method comprises the steps that a first reactant, metal oxide and solid powder of a sodium source are blended, sintered and cooled, the component of the first reactant is NiyFezMn (1-3y-z) (OH) (2-4y), and the particle size of the first reactant is 1-20 micrometers; the metal oxide is any two of TiO2, MgO, Co3O4, SnO2, ZrO2, La2O3 and CeO2, and the particle size D50 of the metal oxide is less than or equal to 5 microns; the sodium source is selected from any one of sodium carbonate, sodium bicarbonate, sodium nitrate and sodium acetate, and the particle size D50 is less than or equal to 10 microns; the particle size of the first reactant is larger than the particle size D50 of the metal oxide, and the particle size D50 of the sodium source is larger than the particle size D50 of the metal oxide.

The invention provides a surface treatment agent, a surface treatment method of a copper foil and a copper foil negative electrode current collector, and belongs to the technical field of energy materials. The copper salt is used as a copper source, the N-alkyl pyridine halogen salt ionic liquid is used as a halogen source, the copper salt and the N-alkyl pyridine halogen salt ionic liquid react in the solution to form cuprous halide particles on the surface of the copper foil in situ, the specific surface area and the roughness of the surface of the copper foil negative electrode current collector are increased, the copper foil negative electrode current collector is firmly combined with an active substance, and therefore the specific capacity and the rate of the lithium ion battery are improved; cu < + > in the cuprous halide particles formed on the surface of the copper foil also participates in electrochemical reaction, so that the specific capacity of the lithium ion battery is further improved. The result of the embodiment shows that the capacity of the lithium ion battery prepared from the copper foil negative current collector obtained by carrying out surface treatment on the copper foil by the surface treating agent provided by the invention can reach 825mAh g <-1 >; 100 times of charge-discharge cycles are carried out under the large current density of 1Ag <-1 >, and the retention rate can reach 95%.

The invention relates to the technical field of semiconductor energy material detection, and discloses a table type X-ray spectrometer multifunctional combined integrated in-situ experiment device, which comprises an X-ray source, a light source, an X-ray detector, an X-ray detector, an X-ray detector, an X-ray detector, an X-ray detector and an X-ray detector, the sample table is used for adjusting the position of the sample in the light path; the flight pipeline is used for transmitting X-rays and signals; the detector is used for collecting electronic signals. By adopting the unique design of the X-ray monochromator and the focusing mirror, the measurement and analysis of an X-ray absorption fine structure and a crystal structure can be realized in a conventional laboratory environment without using a synchrotron radiation light source, and X-ray diffraction, scattering and absorption spectrograms comparable to a synchrotron radiation level are obtained with extremely high sensitivity and light source quality; qualitative and quantitative analysis, crystalline state and valence state analysis and long-range structure and short-range coordination structure analysis of elements are achieved, and grazing incidence X-ray diffraction, powder diffraction and XAS research can be conducted in real time.

The invention provides sodium ion battery diaphragm coating slurry, a coated diaphragm and a sodium ion battery, and belongs to the technical field of energy materials. The raw materials comprise the following components: 5-60 parts of a sodium supplementing material, 50-90 parts of an inorganic solid electrolyte material, 0.1-3 parts of a dispersant, 1-10 parts of a binder, 0.1-5 parts of a wetting agent, 0-2 parts of an auxiliary agent and 100-300 parts of a solvent. The sodium-ion battery sodium-supplementing diaphragm comprises the sodium-ion battery sodium-supplementing diaphragm coating slurry and a base membrane, and at least one side of the base membrane is coated with the sodium-ion battery sodium-supplementing diaphragm coating slurry. According to the sodium-ion battery sodium-supplementing diaphragm prepared from the sodium-ion battery sodium-supplementing diaphragm coating slurry provided by the invention, the sodium-supplementing material in the diaphragm coating compensates sodium ions consumed by SEI film formation and side reaction by providing active Na < + >, so that the reversible capacity of the battery is improved.

The invention relates to the technical field of new energy materials, in particular to a thermoelectric composite material and a preparation method and application thereof.The thermoelectric composite material comprises 2D TMDs, a P-type semiconductor polymer and a conductive polymer, the P-type semiconductor polymer and the conductive polymer are cross-linked to form a composite conductive polymer, and the 2D TMDs are dispersed in the composite conductive polymer. The composite conductive polymer has the effects of forming a thermoelectric loop, regulating and modifying the interface of the 2D TMDs and protecting the 2D TMDs dispersed in the composite conductive polymer, and the 2D TMDs and the P-type semiconductor polymer convert heat energy into electric energy under the Seebeck effect. The thermoelectric building material additive comprises a thermoelectric composite material combined on an inorganic silica gel carrier. The thermoelectric cement-based material comprises cement and a thermoelectric building material additive. The thermoelectric cement-based material has good thermoelectric performance, stability and durability, and is suitable for scenes with obvious temperature difference or urgent energy recovery requirements.

The invention discloses a high-rate silicon-carbon composite negative electrode material and a preparation method thereof, and belongs to the technical field of new energy materials and electrochemistry. The preparation method comprises the following steps: performing oxidation layer reconstruction on photovoltaic silicon waste to obtain a two-dimensional Si / SiOx composite material, then mixing the two-dimensional Si / SiOx composite material with metal salt, and performing spray drying granulation and CVD sectional carbon deposition to realize in-situ growth and carbon coating of carbon nanotubes CNTs, thereby obtaining the high-rate silicon-carbon composite negative electrode material. According to the invention, the in-situ grown carbon nanotubes and the silicon-based material form a good conductive network and closer carbon shell coating, Si-C bonds are formed, a multi-dimensional conductive network is constructed, excellent electron / ion conductivity of the composite material is ensured, a reconstructed oxide layer inhibits volume expansion of silicon, pulverization and failure of the material are prevented, and the performance of the composite material is improved. In-situ growth CNTs are interspersed around silicon to buffer the interface stress of the silicon. The prepared composite material has excellent multiplying power and cycle performance, has kilogram-level production capacity, and shows a wide application prospect in the field of electrochemical materials.

The invention discloses a preparation method of a carbon packaged porous hard carbon / Si composite negative electrode material, and belongs to the technical field of new energy materials. The carbon nanospheres, hexadecyl trimethyl ammonium bromide, ammonia water, m-aminophenol and formaldehyde jointly act on the porous hard carbon / Si composite material, volume expansion of a silicon-based material can be effectively relieved, the transmission distance of lithium ions is shortened, and the cycling stability of an electrode plate is improved. By using the carbon-packaged porous hard carbon / Si composite negative electrode material disclosed by the invention, the cycling stability of a lithium ion battery is remarkably improved, the capacity is not obviously attenuated during large-current charging and discharging, and meanwhile, excellent rate capability is also shown.

The invention discloses a thermochemical energy storage composite material with a bionic ordered structure and a preparation method of the thermochemical energy storage composite material, and relates to the crossing field of new energy materials and thermochemical energy storage technologies. Through an optimization strategy of coordination of geometrical shape, internal channel and surface effect, efficient adsorption / desorption kinetics and solar energy direct drive heat storage are realized. The thermochemical energy storage composite material comprises a matrix with a bionic multi-scale mass transfer structure and hygroscopic inorganic salt uniformly loaded in the matrix, wherein the matrix is activated by KOH and then is loaded with the hygroscopic inorganic salt; the appearance of the base body imitates that of red blood cells, and the base body is in a single concave disc shape; and a vein-like layered directional vein network is arranged in the base body. The problems of moisture absorption and caking, slow mass transfer and low photothermal conversion efficiency of a traditional hydrated salt material are solved, and a new scheme is provided for efficient storage of renewable energy sources.

The invention provides an Nb-doped and P2 / O3 double-phase composite modified sodium-ion battery ternary positive electrode material and a preparation method thereof, and belongs to the technical field of new energy material sodium-ion battery positive electrode materials, and the Nb-doped and P2 / O3 double-phase composite positive electrode material is obtained by combining a coprecipitation method and a high-temperature sintering method, introducing an Nb element and controlling reaction conditions. According to the prepared battery positive electrode material, a strong synergistic effect exists between Nb doping and a P2 / O3 double-phase structure, the structural stability is remarkably improved, side reactions are effectively inhibited, the cycle performance and the rate performance are excellent, Co doping is avoided, and the adverse effect on the environment is small.

The invention provides a preparation method of battery-grade lithium salt, and relates to the technical field of new energy materials. Starting from battery-grade lithium sulfate, part of lithium sulfate is reduced under hydrogen to obtain battery-grade lithium sulfide; part of lithium sulfate reacts with sodium carbonate to obtain battery-grade lithium carbonate, the battery-grade lithium carbonate reacts with hydrochloric acid to obtain lithium chloride, lithium chloride is electrolyzed to obtain metal lithium, and the metal lithium reacts with sulfur, is reduced and is converted into battery-grade lithium sulfide; part of lithium sulfate reacts with sodium hydroxide to obtain battery-grade lithium hydroxide, and then the battery-grade lithium hydroxide reacts with hydrogenation tail gas to obtain battery-grade lithium sulfide. Further, the battery-grade lithium sulfide can be obtained from the lithium-containing ore through the steps of calcination, sulfuric acid leaching, purification and the like. Through conversion and adjustment among different lithium salts, the cost of the lithium sulfide can be adjusted according to different conditions, and low-cost and large-scale mass production of the lithium sulfide is realized.

The invention discloses a method for in-situ lossless repair of an attenuated lithium manganate positive electrode material, which specifically comprises the following steps: adding the attenuated lithium manganate material into a lithium hydroxide solution, supplementing lithium to an original value by a hydrothermal method, repairing the component and structure defects of attenuated LiMn2O4 by combining high-temperature roasting, and recycling and regenerating lithium manganate particles with severely attenuated capacity. The lithium manganate positive electrode material is directly recovered by the lossless method, and the chemical components and crystallinity of the invalid positive electrode material in various health states are reconstructed, so that the invalid positive electrode material can be repeatedly used in the lithium ion battery. Finally, the treated recycled powder material is coated by a metal organic framework (MOFs) self-assembly method, so that the electrochemical performance of the treated powder material is further improved. The method is simple, environmentally friendly and low in energy consumption, has obvious advantages compared with a traditional hydrometallurgy battery recovery method, and lays an important foundation for sustainable manufacturing of energy materials.

The invention provides a silicate nanotube photo-thermal composite catalyst with CeO2-ZrO2 compositely coated with Ni as well as a preparation method and application of the silicate nanotube photo-thermal composite catalyst, and belongs to the technical field of energy materials. The catalyst takes a layered silicate nanotube as a carrier, is loaded with an active component Ni, and is coated with a CeO2-ZrO2 composite shell layer. The preparation method comprises the steps that firstly, a Ni-PSNTs precursor is synthesized through microwave hydrothermal synthesis, then Ce-Zr hydroxide is deposited in an ethanol solvent, ZrO2 / CeO2 layers are stacked alternately through an atomic layer deposition method, H2 / N2 pulse reduction is conducted after calcination, and the target catalyst is obtained. The methane conversion efficiency and stability are obviously improved. The problems that a traditional catalyst is low in activity, poor in carbon deposition resistance and low in photo-thermal efficiency are solved, and the catalyst is suitable for the fields of efficient conversion of fossil energy and the like.

The invention provides a chlorine tungsten anion and cation co-doped sodium vanadium phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of energy materials. The positive electrode material is formed by doping V site with W < 4 + > ions and doping (PO4) 3 site with Cl <-> ions, the chemical formula of the positive electrode material is Na < 3-x > V < 2-x > W < x > (PO4) < 3-y > Cl3y / C, x is equal to 0.05, 0.1 and 0.15, and y is equal to 0.09, 0.12 and 0.15; according to the preparation method, ammonium metavanadate, sodium acetate and ammonium dihydrogen phosphate are taken as raw materials, tungsten disulfide and sodium chloride are taken as doping sources, citric acid monohydrate is taken as a chelating agent, and the chlorine tungsten anion and cation co-doped sodium vanadium phosphate electrode material is prepared by a solution gel method, so that the electronic conductivity is improved, and the rate capability and the cycling stability are improved; the preparation method has a good application prospect in sodium ion battery positive electrode materials.

The invention discloses a titanium-based high-entropy amorphous / tungsten multilayer film with radiation resistance and low hydrogen retention potential and a preparation method and application thereof, and belongs to the technical field of nuclear energy materials. The titanium-based high-entropy amorphous / tungsten multilayer film sequentially comprises a first TiVZrNbTaMoB alloy layer, a W layer and a second TiVZrNbTaMoB alloy layer from bottom to top, and the atomic percent of TiVZrNbTaMoB alloy in the first TiVZrNbTaMoB alloy layer and the atomic percent of TiVZrNbTaMoB alloy in the second TiVZrNbTaMoB alloy layer are as follows: 45%-50% of Ti, 20%-30% of V, 8%-15% of Zr, 10%-20% of Nb, 0.5%-3% of Ta, 0.3%-1% of Mo and 0.1%-0.3% of B. The preparation process mainly adopts a magnetron sputtering method. The obtained multilayer film has the potential of radiation resistance and low hydrogen retention.