75results about How to "Dissolution inhibition" patented technology

The invention provides flame-retardant tread rubber as well as a preparation method and application thereof. The flame-retardant tread rubber is prepared from the following raw materials in parts by weight: 100 parts of matrix rubber, 24-35 parts of a composite flame retardant, 40-100 parts of filler, 1-4 parts of a silane coupling agent, 2-6 parts of an anti-aging agent, 1-3 parts of sulfur, 1-3 parts of an accelerant, 1-3 parts of stearic acid and 3-5 parts of zinc oxide, the composite flame retardant comprises a halogen flame retardant and an inorganic flame retardant, the inorganic flame retardant comprises an inorganic coating flame retardant, and the inorganic coating flame retardant comprises an antimony trioxide core and a molybdenum disulfide coating layer coating the surface of the antimony trioxide core. In the flame-retardant tread rubber disclosed by the invention, a molybdenum disulfide coating layer in the inorganic coating flame retardant can improve the stability of antimony trioxide at a high temperature, and can enhance the interfacial compatibility with a non-polar rubber matrix at the same time, and the synergistic reaction with the halogen flame retardant further improves the flame-retardant effect; therefore, the flame retardancy of the rubber is improved, and excellent mechanical properties are kept at the same time.

The application discloses a wet oxidation catalyst, which comprises the following raw materials in percentage by weight: 0.1-2% noble metal, 1-10% graphene-based material, and the rest is a carrier, wherein the carrier is modified titanium dioxide, specifically, a rare earth-transition metal-oxygen vacancy-mesoporous three-dimensional gradient titanium dioxide carrier. The application aims at solving the technical problem of poor stability of the catalyst.

The invention relates to a positive electrode active material and a preparation method thereof, a positive electrode and a lithium ion battery. The positive electrode active material comprises lithium manganate particles and a sodium phytate layer coating the surfaces of the lithium manganate particles. According to the technical scheme, in the positive electrode active material, the sodium phytate layer serves as a coating layer, and six phosphate groups in molecules of the sodium phytate layer and manganese ions dissolved out of lithium manganate particles can form a stable complex, so that the dissolved-out manganese ions are efficiently captured and prevented from being further migrated into an electrolyte to damage the performance of a battery; meanwhile, the sodium phytate layer forms a layer of compact physical barrier on the surfaces of the lithium manganate particles, so that direct contact between the lithium manganate particles and an electrolyte can be effectively blocked, and dissolution of manganese ions is inhibited from the source. Through a synergistic effect of a chelation effect and a physical barrier effect of the sodium phytate layer, the dissolution amount of manganese ions can be remarkably reduced, and the crystal structure of lithium manganate particles is prevented from being distorted, so that the structural stability of the positive electrode active material is improved.

The invention provides an electrolyte and a lithium ion battery using the same, the electrolyte comprises an electrolyte additive, and the electrolyte additive comprises a first compound and a second compound; wherein the chemical structural formula of the first compound is shown as a formula (I-a) or a formula (I-b), and the chemical structural formula of the second compound is shown as a formula (II); in the formula (I-a), the formula (I-b) and the formula (II), R1 to R10 are respectively and independently selected from hydrogen atoms, halogen atoms, carbonyl groups, cyano groups, isocyanate, isothiocyanate, unsubstituted or substituted alkyl groups of C1 to C10, unsubstituted or substituted alkoxy groups of C1 to C10, unsubstituted or substituted alkenyl groups of C2 to C10, unsubstituted or substituted alkynyl groups of C2 to C10 and unsubstituted or substituted aryl groups of C6 to C20; and in the formula (II), the number of cyano groups is greater than or equal to 1. By introducing the first compound and the second compound, the normal-temperature and high-temperature cycle performance and low-temperature performance of the battery during high-voltage operation are improved.

The application relates to the technical field of battery materials. Disclosed are a lithium nickel-manganese acid positive electrode material, a preparation method thereof, a positive electrode and a battery. The lithium nickel-manganese acid positive electrode material comprises a base material and a first coating layer and a second coating layer successively coated on the surface of the base material; the chemical general formula of the base material is Li(Li a Ni b Mn c Fe d Sb e )O 4‑x , wherein a+b+c+d+e=2, 0<=x<=0.2, 0<=a<=0.1, 0.4<=b<=0.5, 1<=c<=1.5, 0.1<=d+e<=0.4; the first coating layer comprises NbTi(PO4)3, and the mass ratio of the first coating layer to the base material is 0.1-5:100; the second coating layer comprises a carbon material, and the mass ratio of the second coating layer to the base material is 0.1-5:100. The lithium nickel-manganese acid positive electrode material provided by the embodiment of the application has excellent electrochemical performance.

The invention discloses a lithium manganate positive electrode material, a preparation method and an applied lead-lithium battery, relates to the technical field of lithium manganate positive electrode materials, and solves the problems that the existing lithium manganate positive electrode material is poor in structure and interface stability and poor in rate and cycle performance. The positive electrode material is composed of a lithium manganate matrix and a double-layer composite coating, the matrix is prepared by taking lithium carbonate and manganous-manganic oxide as raw materials and doping magnesium hydroxide, aluminum hydroxide and titanium dioxide multi-plasma phase; the lithium manganate positive electrode material is prepared by uniformly compounding a lithium manganate matrix modified by a spinel inner layer, vinyl functionalized MOF and a polyvinylidene fluoride-hexafluoropropylene copolymer on the surface of an aluminum foil receiver through an electrospinning-electrospray synergistic process. The material is applied to the lead-lithium battery, shows excellent electrochemical performance and has good practical application value.

The present invention provides a non-aqueous electrolyte comprising a lithium salt, an organic solvent, and a compound of the following Chemical Formula 1 as an additive, r1 is any one selected from the group consisting of F, R, an alkyl group having 1 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, an alkenyl group having 2 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, an alkynyl group having 2 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, OR'and OCOR '; and R'is any one selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, an alkenyl group having 2 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, and an alkynyl group having 2 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, where in Chemical Formula 1 and R1, R1 represents an alkyl group having 1 to 10 carbon atoms, which may be substituted with one or more fluorine atoms, and R2 represents an alkyl group having 1 to 10 carbon atoms, which may be substituted with one or more fluorine atoms. R has a structure represented by the following Chemical Formula 2, and in Chemical Formula 2, Rx and Ry are each independently H or F. [Chemical Formula 1] and [Chemical Formula 2].

The application discloses a manganese iron lithium phosphate composite positive electrode material with Mn ion self-compensation and multiple interception functions and a preparation method thereof. The manganese iron lithium phosphate composite positive electrode material is composed of a manganese iron lithium phosphate positive electrode material and functional composite film micro-powder loaded on the surface and between the particles of the manganese iron lithium phosphate positive electrode material. The functional composite film of the functional composite film micro-powder is prepared from Na-merolite powder through Mn ion exchange, grafting and copolymerization, lithiumation and PVA composite film preparation. The manganese iron lithium phosphate composite positive electrode material is prepared from the manganese iron lithium phosphate positive electrode material and the functional composite film through mixing, crushing and freeze-drying. The manganese iron lithium phosphate composite positive electrode material realizes the inhibition of the dissolution of Mn 2+ in the manganese iron lithium phosphate positive electrode material from the source, improves the ion conduction performance and the cycle stability of the manganese iron lithium phosphate positive electrode material, and has the advantages of high capacity, long cycle life, high safety and the like.

This invention discloses a samarium-modified biochar catalyst, its preparation method, and its application. The method includes the following steps: Step 1, cleaning, drying, and grinding *Platycladus orientalis* leaves to obtain *Platycladus orientalis* leaf powder; Step 2, dissolving Sm(NO3)3·6H2O in deionized water to prepare a samarium salt solution, adding the *Platycladus orientalis* leaf powder to the samarium salt solution, stirring for 1 h, allowing it to stand and soak for 12 h, and then drying to obtain a samarium-supported *Platycladus orientalis* leaf powder precursor; Step 3, placing the samarium-supported *Platycladus orientalis* leaf powder precursor in a tube furnace, heating it to 500-700℃ at a heating rate of 5℃ / min under a protective gas atmosphere, pyrolyzing for 3-4 h, naturally cooling to room temperature, and then washing, drying, grinding, and sieving to obtain the samarium-modified biochar catalyst. The biochar catalyst prepared by this invention can efficiently and stably activate persulfate, thereby rapidly degrading amoxicillin in wastewater, and can be recycled multiple times. It has the advantages of low metal leaching rate and wide availability of raw materials.

This invention provides a composite separator, its preparation method, a battery, and an electrical device. The composite separator includes a base film layer and a functional modification layer disposed on at least one surface of the base film layer. The functional modification layer includes modified ceramics and modified sepiolite fibers. The modified ceramics include ceramic particles and polydopamine coated on the surface of the ceramic particles. The modified sepiolite fibers include sepiolite fibers and a silane coupling agent coated on the surface of the sepiolite fibers. The composite separator not only exhibits excellent heat resistance but also high mechanical strength, high peel strength, and excellent ionic conductivity, while demonstrating outstanding cycle stability.

The present invention provides a kind of hard coating formation with active energy ray hardenable composition, the hard coating film using the composition and the laminate of the hard coating film, wherein the damage in display production process is inhibited, the curl production caused by hardening shrinkage, and the elution of ultraviolet cut agent in the saponification process of TAC film.The problem can be solved by hard coating formation with active energy ray hardenable composition, which is a composition for forming a hard coating on triacetyl cellulose film, containing: active energy ray hardenable component (A) comprising a specific (meth) acrylate, ultraviolet cut agent (B), photopolymerization initiator (C) and specific solvent (D).

The utility model discloses a kind of heating disc and the liquid heater applied to it, it is related to heating disc technical field, comprising have: stainless steel contact layer, the stainless steel contact layer is used to directly contact with liquid, realize the heating conduction of liquid;Stainless steel base layer, the stainless steel base layer is used to bear thick film circuit or heating element, realize heat generation and conduction;Aluminum alloy soldering layer, the aluminum alloy soldering layer is between stainless steel contact layer and stainless steel base layer, for the welding of auxiliary stainless steel contact layer and stainless steel base layer;Stainless steel contact layer and stainless steel base layer of using S316 or S304 material, collocation porous aluminum alloy soldering layer, avoid heating disc surface rust, corrosion, prolong the service life of heating disc, while enhanced the overall structural stability of heating disc, and effectively improve heating efficiency, shorten the time of liquid heating.

The application provides a double-coating lithium iron phosphate positive electrode sheet, a preparation method and application thereof. The preparation method comprises the following steps: mixing modified large-particle lithium iron phosphate, modified small-particle lithium iron phosphate, a conductive agent, a binder and a solvent to obtain a first slurry and a second slurry; adopting double-layer slot extrusion coating to coat the first slurry on the surface of a current collector and coat the second slurry on the surface of the first slurry; and drying and rolling to obtain the double-coating lithium iron phosphate positive electrode sheet; the modified large-particle lithium iron phosphate is doped with Ti and Nb, and the modified small-particle lithium iron phosphate is doped with Mg and Al. The application adopts a multi-element doped positive electrode material combined with a double-layer coating preparation method to avoid the shortcomings of LFP materials, improve the rate performance, high-temperature performance and cycle performance of LFP, and has the advantages of simple preparation process and easy industrial production. The prepared positive electrode material and the secondary battery using the same have excellent comprehensive performance, and have a wide application prospect in the field of power batteries.

The application discloses a kind of composite positive plate and lithium ion battery and preparation method.The composite positive plate includes positive current collector;Positive current collector surface is coated with positive active material layer;Positive active material layer surface is coated with solid electrolyte layer;Positive active material layer includes positive active material, oxide solid electrolyte, conductive agent, dispersing agent and binder and the mass ratio of these components is (91.9%~97.45%): (0.5%~5%): (1%~1.5%): (0.05%~0.1%): (1%~1.5%);Solid electrolyte layer includes oxide solid electrolyte, conductive agent, dispersing agent and binder and the mass ratio of these components is (13.9%~70.9%): (13.2%~49.2%): (0.6%~3.8%): (13.2%~49.2%);The application is conducive to guaranteeing battery thermal safety while significantly improving battery fast-charging capability.

The present application relates to the field of medical materials, in particular to a preparation method of high-performance medical tantalum coating. A thin-size-low-diffusion tantalum coating is prepared on the surface of a porous titanium alloy substrate by a chemical vapor deposition method through a halide reaction of hydrogen reduction of metallic tantalum; there is an alloy element interdiffusion zone between the tantalum coating and the porous titanium alloy substrate, and the thickness of the interdiffusion zone is less than the thickness of the tantalum coating. The present application obtains a high-performance thin-size tantalum coating with high purity, small grain size and controllable transition layer suitable for the porous titanium alloy substrate, has higher preparation efficiency and lower cost, realizes high bonding strength of the coating and simultaneous improvement of the strength and plasticity of the porous titanium alloy, avoids dissolution of toxic metal ions such as Al and V, and improves biocompatibility and osteogenic performance. The new tantalum coating porous titanium alloy implant device has obvious advantages of higher mechanical, chemical and biological safety and lower cost, and is suitable for the fields of orthopedics, dental implants and tissue defect fillers.

This invention belongs to the field of electrode material technology, specifically relating to a modified LiMn2O4 composite material, its preparation method, and its applications. The modified LiMn2O4 composite material has a core-shell structure with chromium-doped lithium manganese oxide as the core and lithium lanthanum titanium oxide as the coating layer; the lithium lanthanum titanium oxide coating layer has an amorphous structure. This invention, through the synergistic modification of chromium bulk doping and lithium lanthanum titanium oxide interface coating, enables the lithium lanthanum titanium oxide coating layer to possess three functions: physical isolation, ion conduction, and ion sieving. This suppresses manganese dissolution while ensuring lithium-ion transport efficiency and improving lithium-ion selectivity. When used in an electrochemical lithium extraction device, the modified LiMn2O4 composite material exhibits excellent cycle stability and lithium-magnesium separation selectivity in high magnesium-to-lithium ratio brines.

This invention discloses a low-temperature high-performance cathode material, its preparation method, and its application, relating to the field of lithium-ion battery cathode material technology. The cathode material is a layered LiNi alloy. 0.6 Co 0.2 Mn 0.2 Using O2 as a matrix, a composite interface layer is constructed in situ on the particle surface. This composite interface layer comprises an outer continuous coating layer and an inner near-surface control layer. Surface reactions and heat treatment using a Li2O, B2O3, and Li3PO4 precursor system are employed to suppress interfacial side reactions, stabilize the near-surface structure, and achieve low-temperature Li... + Improved transport capacity. At -20°C, the preferred sample achieved a discharge specific capacity of 154.21 mAh g⁻¹ in the 10th cycle. ‑1 The rate performance, cycle stability and polarization index are all superior to the original sample and the key control group.

The invention relates to the technical field of lithium ion batteries, and discloses a high-nickel ternary positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing and sintering a nickel-cobalt-manganese precursor, a lithium source, niobium salt and fused salt. According to the preparation method of the high-nickel ternary positive electrode material provided by the invention, the niobium salt and the molten salt form a liquid phase environment at a relatively low temperature, and the niobium element can efficiently enter a crystal lattice, so that uniform bulk phase doping in a real sense is realized, and the electrochemical stability and the thermal stability are improved; meanwhile, the niobium doping can ensure the rapid and uniform transmission of the lithium source, so that the lithiation is more sufficient, and the lithium-nickel mixed arrangement caused by lithium deficiency is reduced in dynamics.

The application provides an oil tank and a vehicle, and relates to the technical field of automobile accessories. The oil tank comprises a tank body, the tank body comprises a first outer layer and a first inner layer which are arranged in layers, the first outer layer is located on the outer side of the first inner layer, the first inner layer is a first methanol-resistant anticorrosive layer, and the first outer layer is a first light metal layer. The oil tank and the vehicle can prolong the service life of the oil tank.

The invention belongs to the technical field of new energy, and particularly relates to a coated lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing an acrylamide polymer and a metal coating agent, and performing spray drying to obtain a mixture; and S2, coating the surface of the lithium-rich manganese-based positive electrode material with the mixture, and sintering to obtain the coated lithium-rich manganese-based positive electrode material. The coated lithium-rich manganese-based positive electrode material provided by the invention has high capacity, high magnification and high cycle performance.

This invention discloses a binder, its preparation method, and its application. The binder comprises the following raw materials: a compound containing soft segments, a compound containing hard segments, and a chain extender. The compound containing soft segments includes polyether polyols and polyester polyols, wherein the polyether polyols are end-capped with amino or hydroxyl groups, and the polyester polyols are end-capped with amino or hydroxyl groups. The compound containing hard segments is a diisocyanate, and the chain extender is a chain extender containing phenolic groups. This binder helps solve the interface problem of the positive electrode during battery operation and is expected to improve the cycle life and stability of the battery.

The invention relates to a preparation method of a high-stability chalcogenide modified Fe-N-C catalyst based on a confinement gas phase migration strategy, which comprises the following steps: S1, etching the Fe-N-C catalyst by using an etching gas decomposed from ammonium chloride at high temperature to obtain a defect-rich Fe-N-C catalyst; s2, the chalcogenide powder and the Fe-N-C catalyst rich in defects are mixed to be uniform, the mixture is placed in a vacuum and closed container, pyrolysis treatment is conducted at the temperature not lower than the temperature at which the chalcogenide powder is converted into chalcogenide steam, the chalcogenide modified Fe-N-C catalyst is obtained, and the chalcogenide powder is sulfur powder or selenium powder or tellurium powder. According to the method, a confinement gas phase migration strategy is adopted, a closed confinement reaction space is constructed, accurate preparation of the sulfur group modified Fe-N-C catalyst is achieved, and the problems that the stability of the Fe-N-C catalyst is insufficient and a volatile element doping process is difficult to control can be effectively solved.

The application discloses a self-adaptive heavy metal solidification and blocking micro-particle, which comprises, from inside to outside, a heavy metal dissolution blocking agent inner core, a triggerable capsule wall and a heavy metal solidification agent shell layer arranged in sequence; wherein the heavy metal dissolution blocking agent inner core material is mainly obtained by compounding silicate and nano-scale active silicon dioxide, the triggerable capsule wall material comprises a pH trigger material and a heat-curing resin; and the heavy metal solidification agent shell layer material is mainly obtained by compounding and intercalating modified kaolin, a calcium-silicon ratio regulator and a sulfate. The application mainly reduces heavy metal dissolution of large-dosage steel slag micro-powder concrete in a service process from two aspects of early solidification and later prevention, and reduces the cracking risk of the large-dosage steel slag micro-powder concrete in a preventive and later compensatory mode; the application can meet the requirements of multiple scene services, and even when the concrete has slight cracks, the application will not increase the risk of heavy metal dissolution, and is suitable for popularization and application.

This application discloses a durable antibacterial finishing liquid and an antibacterial wool fabric. The finishing liquid comprises the following raw materials in parts by weight: 10-20 parts of waterborne polyurethane, 1-5 parts of antibacterial agent, 0.5-2 parts of penetrant, 1-3 parts of dispersant, and 50-120 parts of deionized water. The waterborne polyurethane comprises polyurethane A and polyurethane B in a mass ratio of 1:0.4-0.8. Polyurethane A is prepared by a Michael addition reaction of polyurethane containing acrylate end groups with amino silicone oil; polyurethane B is prepared by a Michael addition reaction of polyurethane containing acrylate end groups with amino polyether. The solution of this application can solve the problems of poor water resistance and easy peeling of existing antibacterial finishing coatings for wool fabrics, resulting in insufficient antibacterial durability.

The embodiment of the application provides a magnetic ternary Fe-S / Fe3O4@N / S-C nanocomposite material and a preparation method and application thereof, the nanocomposite material constructs a Fe-S / Fe3O4 heterojunction in a N / S co-doped carbon frame in situ, so that the agglomeration of nanoparticles and the dissolution of metal ions are effectively prevented; then by regulating the iron active center to be a Fe(III) species with a medium spin state, the iron-based nanocomposite material can efficiently activate PMS in a non-radical pathway, and the degradation efficiency of organic pollutants in sewage is improved; and the nanocomposite material can exhibit excellent catalytic degradation performance in a wide range of pH 3-12, and can realize more than 96% removal rate of various organic pollutants such as rhodamine B, tetracycline, orange II and the like within 15-25 minutes, effectively overcoming the defects that the traditional Fenton system is only applicable under acidic conditions and is easily disturbed by the background material of water.

The present invention provides a negative electrode active material for a lithium secondary battery, which is characterized by comprising a core-shell composite, and the core-shell composite comprises: a core, which comprises a silicon oxide (SiO x , 0 < x ≤ 2) and a graphite-based material containing a lithium-containing substance; and a shell, which is located on the core and comprises amorphous carbon, wherein the silicon oxide (SiO x , 0

This invention provides a battery comprising an electrolyte and a negative electrode, wherein the negative electrode active material comprises a silicon-containing material; the electrolyte comprises a first additive and a second additive, the first additive comprising fluoroethylene carbonate, and the second additive comprising a compound having a structure of Formula 1, wherein R1-R3 are each independently selected from substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, or substituted or unsubstituted C2-C10 alkynyl groups, and at least one unsaturated group is included in R1-R3. The battery provided by this invention uses silicon material as the negative electrode and exhibits excellent room temperature and high temperature cycling performance, as well as high temperature storage performance.

This invention discloses a modified polymethylhydrosiloxane electrolyte additive, its preparation method, electrolyte, and applications, belonging to the field of lithium metal batteries. The additive of this invention has a siloxane main chain, with at least one of carbonate and fluoroalkane substituents and an ether substituent introduced into the side chain. This allows the modified polymethylhydrosiloxane, when used as an electrolyte additive, to effectively reduce side reactions between lithium metal and the electrolyte, inhibit lithium dendrite growth, and maintain the crystal structure of the high-nickel cathode, reducing its disintegration and nickel ion deposition. When compounded with carbonate organic solvents as an electrolyte and applied to lithium metal batteries, it effectively improves the cycle stability and coulombic efficiency of lithium metal batteries.

The application provides a method for preparing lithium iron phosphate from iron hydroxyl phosphate and ferrous oxalate. The ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution and ammonia water are sequentially added to the solution to form a mixed slurry. The mixed slurry is heated and kept warm, and then washed with water and filtered under pressure to form an iron hydroxyl phosphate precursor with different iron and phosphorus ratios. The iron hydroxyl phosphate precursor is dried by flash evaporation and sintered at high temperature and then crushed to obtain an iron hydroxyl phosphate precursor with different iron and phosphorus ratios and different specific surface areas. The iron hydroxyl phosphate precursor is crushed and mixed to obtain an iron hydroxyl phosphate product. The high-iron and low-iron ratio iron hydroxyl phosphate is mixed with ferrous oxalate, lithium phosphate, lithium carbonate and ammonium dihydrogen phosphate in a certain proportion, and a carbon source and an additive are added to form a mixture. The mixture is subjected to a series of processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging to obtain a lithium iron phosphate product.

The invention belongs to the technical field of lithium ion battery positive electrode materials, and discloses a lithium manganese iron phosphate material with a solid-hollow composite structure and a preparation method thereof.The preparation method adopts a step-by-step reaction and co-sintering method, and comprises the steps that firstly, heterogeneous nucleation is achieved through the solubility product difference of manganese phosphate to form a hollow lithium manganese phosphate precursor; subsequently adding an iron source, a titanium source and other raw materials, and performing spray drying and inert atmosphere sintering to construct a composite structure of solid particles and hollow particles; the lithium manganese iron phosphate material with the solid-hollow composite structure has the characteristics that solid particles provide mechanical support, hollow microspheres increase ion conduction channels and a compact structure formed by a three-dimensional network, and the compaction density gt of a pole piece is realized; 2.5 g / cm < 3 > and 2C rate capacity retention rate gt; and the method has important new energy automobile and large-scale energy storage industrialization application value.