19results about How to "Facilitate charge transfer" patented technology

The invention discloses a strong-adsorption super-wetting self-assembled micromolecule and a preparation method and application thereof.The substituent groups of the self-assembled micromolecule are two arylphosphonic acids, meanwhile, the acidic N-H group of carbazole is kept unchanged, bisphosphonate anchoring shows enhanced adsorption capacity and efficient hole extraction / transmission, and the self-assembled micromolecule has the advantages that the self-assembled micromolecule is high in adsorption capacity and high in hole extraction / transmission efficiency; a reverse substituted carbazole ring contributes to a super-wetting bottom layer of perovskite, and meanwhile, compared with a small molecule of monoaryl phosphonic acid, the molecule has higher stability under long-time illumination. The strong-adsorption super-wetting self-assembly micromolecule disclosed by the invention is simple in synthesis step, low in preparation cost, high in yield and capable of realizing large-scale synthesis. By adopting the formula I as the hole transport layer of the p-i-n type perovskite solar cell, a firmly adsorbed super-infiltration self-assembly single layer can be prepared, so that a high-quality perovskite thin film is realized and energy mismatch is reduced, and the efficiency and the stability of a perovskite single cell and a laminated cell are remarkably improved.

The invention belongs to the technical field of biochemical sensing, and particularly relates to a sulfide colloidal quantum dot-based biosensor for exosome detection as well as preparation and application thereof. Transferring the sulfide colloidal quantum dot solution to a metal gate electrode of a high electron mobility transistor or a working electrode of a screen printing three-electrode to form a sulfide colloidal quantum dot film; coating the sulfide colloidal quantum dot film with an antibody protein modification layer, and closing non-specific active sites on the antibody protein modification layer by adopting bovine serum albumin; the antibody protein can be specifically bound with transmembrane protein corresponding to the surface of an exosome to be detected, so that the exosome to be detected is captured on the surface of the electrode, and meanwhile, based on the unique physical and chemical effect of the sulfide colloidal quantum dots, the modified electrode has the capability of sensing the distribution change of external charges, so that the detection sensitivity of the exosome to be detected is improved. Therefore, rapid and quantitative detection of the exosome is realized.

The invention relates to the technical field of lithium batteries, and particularly discloses a preparation method of a positive electrode material for improving the capacity and cycle performance of a lithium battery. Comprising the following operation steps: grinding and mixing NCM, gallium trichloride and polyvinylidene fluoride, calcining in a nitrogen atmosphere to obtain modified NCM, and taking the modified NCM as an active material; the preparation method comprises the following steps: sequentially adding a conductive agent and a vinyl silane coupling agent into 20-30wt% of an ethanol aqueous solution, stirring at 50-60 DEG C for 1-2 hours, and freeze-drying to obtain a vinyl conductive agent; the preparation method comprises the following steps: sequentially adding a vinyl conductive agent, 3-vinyl phenylboronic acid, 4-vinylaniline, N-vinyl pyrrolidone, 1, 3-divinyl-2-imidazolinone and benzoyl peroxide into deionized water, carrying out an oil bath stirring reaction in a nitrogen atmosphere, washing, drying, grinding and sieving to obtain a modified conductive agent; and uniformly mixing the active material, the binder and the conductive agent to obtain the positive electrode material.

The invention belongs to the technical field of catalyst preparation, and relates to an organic ligand modified metal catalyst, in particular to a preparation method of an organic ligand modified PdMn catalyst for upgrading waste plastics. The preparation method comprises the following steps: uniformly mixing metal precursors of palladium and cobalt with an organic solvent n-caprylic acid by adopting a wet chemical method, carrying out an oil bath reaction for a period of time, separating precipitates, and sequentially washing and drying to obtain the nano flaky PdMn catalyst. The preparation method disclosed by the invention is simple, few in steps and simple to operate. The prepared organic ligand modified PdMn catalyst has more excellent catalytic activity than a monometal Pd catalyst in electrocatalytic oxidation in ethylene glycol in an alkaline environment, and can be converted into a high-value product under the condition of PET hydrolysate.

The present invention relates to the technical field of preparation of lithium ion battery electrode materials, and specifically to an aluminum-niobium co-doped lithium-rich layered positive electrode material and a preparation method thereof. The steps include: preparation of a cationic colloidal solution; preparation of a derivative carbon precursor solution; coating and sintering of a positive electrode powder material. The present invention uses an electrostatic spinning machine to directly spray the spinning solution into an alkaline solution, and simultaneously adds solution B. At the moment when the spinning solution is electrostatically spun into the alkaline solution, a precipitate is generated on the surface of the nanofiber and is quickly fixed, and a precipitation reaction also occurs inside the fiber through a diffusion mechanism. The generated precursor is not only orderly arranged, but also has a porous structure, which improves the rate performance of the electrode material, and can also form an interlocking structure between the fibers. The added lithium ion solution is deposited on the fiber surface, which can effectively improve the mechanical strength and conductivity of the positive electrode material, so that the material maintains stability during long-cycle use and reduces capacity attenuation.

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 invention relates to a preparation method of a lithium-sulfur battery positive electrode material, in particular to a preparation method of a boric acid etched flower-like bimetallic loaded porous carbon material for a lithium-sulfur battery. The invention aims to solve the problems of slow oxidation-reduction reaction rate and shuttle effect of a sulfur positive electrode in a lithium-sulfur battery. The method disclosed by the invention comprises the following steps: 1, preparing a nickel-cobalt bimetal organic framework compound (NiCo-ZIF8); (2) preparation of nitrogen-doped porous carbon (NiCo / NPC) with nickel and cobalt double atoms fixed thereon; and 3, preparing the nickel-cobalt diatom-based composite positive electrode material (S / NiCo / NPC). According to the preparation method, cobalt nitrate hexahydrate and nickel nitrate hexahydrate are taken as metal salts, 2-methylimidazole is taken as an organic ligand, boric acid is taken as a pore-forming agent, and the nickel-cobalt-doped flower-shaped porous carbon is prepared through a one-step pyrolysis method, so that the problems of low oxidation reduction rate, positive electrode volume expansion and shuttle effect of a sulfur positive electrode in a lithium-sulfur battery are effectively solved. Meanwhile, the invention provides a new strategy for promoting bidirectional catalysis of a lithium-sulfur system by manipulating the spin delocalization electron effect. The adopted raw materials are rich and low in cost, and the preparation process is simple, convenient and feasible, so that the preparation method has great commercial application potential.

The present invention relates to an n-type conjugated polymer blend, which is made from aromatic diketone with active methylene or an enolic transformation product thereof, and is obtained directly by polymerization reaction in the presence of an oxidant. The reaction described does not require precious metal catalysis and is insensitive to a reaction atmosphere. A process is simple and inexpensive and suitable for commercial applications. Meanwhile, the modulation of the conductivity of this n-type conjugated polymer can be achieved by ionic modification. This n-type conjugated polymer can be applied to an organic optoelectronic device to achieve an excellent photovoltaic effect.

The invention relates to the technical field of platinum complex phosphorescent materials, and particularly discloses an efficient solution-processable platinum complex luminescent material constructed by an AI E-HLCT ligand and application of the efficient solution-processable platinum complex luminescent material constructed by the AI E-HLCT ligand, the efficient solution-processable platinum complex luminescent material constructed by the AI E-HLCT ligand is prepared by taking an aggregation-induced hybrid local charge transfer (AI E-HLCT) material N, N '-(pyrimidine-4, 6-diyl-bis (4, 1-phenylene)) bis (N-([1, 1'-biphenyl]-4-yl)-[1, 1 '-biphenyl]-4-amine) as a CN bidentate ligand; 2, 2, 6, 6-tetramethyl-3, 5-heptanedione with a solubilizing function is adopted as the auxiliary ligand; the AI E-Pt complex PyBT-Pt-THD with the spiral space structure is invented through cooperation of a flexible AI E-HLCT ligand and metal Pt, and the AI E-Pt complex PyBT-Pt-THD has the AI E characteristic, can eliminate the aggregation-induced quenching effect (ACQ) and further improve the luminous efficiency, and meanwhile, the solubility is effectively improved, so that the AI E-Pt complex PyBT-Pt-THD can be processed in a solution.

The invention discloses a nano preparation for crossing a blood brain barrier as well as a preparation method and application of the nano preparation. The nano preparation comprises a newly designed BODIPY derivative. According to the novel BODIPY derivative, the photo-thermal and photodynamic performance is remarkably improved, after the BODIPY derivative and an amphiphilic polymer are prepared into a nano preparation, targeted enrichment of brain glioma can be achieved, an efficient and safe novel strategy is provided for treatment of in-situ glioblastoma, and the BODIPY derivative has wide application prospects.

The invention discloses a WO3 / CN composite photocatalytic material based on in-situ coupling. The WO3 / CN composite photocatalytic material comprises a CN nanosheet and a WO3 nanorod grown on the CN nanosheet in situ. The invention also discloses a preparation method of the WO3 / CN composite photocatalytic material, which comprises the following steps: (1) dispersing thiourea in a solvent to obtain a thiourea solution; then adding WCl6, and continuously stirring at room temperature to uniformly mix the materials; (2) performing ultrasonic treatment on the mixed material in the step (1) to form a uniform suspension; depositing the solid at the bottom of the beaker due to the low surface tension of the ethanol, and drying the obtained solid after solid-liquid separation; and (3) drying, and calcining to obtain the WO3 / CN composite photocatalytic material. According to the method disclosed by the invention, the composite photocatalytic material with a specific morphology is prepared through a specific process, and the composite photocatalytic material has a large specific surface area and multiple active sites and can realize better adsorption of reactants, so that the photocatalytic performance of the photocatalytic material is greatly improved.

The invention discloses a substituent group modified oxobenzene core non-condensed ring small molecule, which has the following structural formula: # imgabs0 #, in the formula, R1 is a C1-C30 alkyl chain, X and Y are respectively and independently selected from one of F, Cl, CH3 and OCH3, and Z is selected from one of H, F, Cl and CH3. According to the invention, a substituent-modified oxo-benzene ring is taken as a core unit, an electron pi bridge and end group optimization are combined, the coplanarity of a skeleton is cooperatively adjusted by utilizing an expansion effect and an electron effect, the crystallinity and the electron mobility of the material are improved, controllable adjustment of spanning from a medium band gap to a low band gap is realized, and energy loss is inhibited. When the non-condensed ring micromolecule is applied to an organic solar cell, the overall synthesis steps can be effectively simplified, the yield is improved, the preparation cost is reduced, and the efficiency of an obtained cell device is remarkably improved.

The invention relates to the technical field of preparation of lithium ion battery electrode materials, in particular to an aluminum-niobium co-doped lithium-rich layered positive electrode material and a preparation method thereof. Comprising the following steps: preparing a cationic colloidal solution; preparing a derivative carbon precursor solution; and coating and sintering the positive electrode powder material. A spinning solution is directly sprayed into an alkaline solution through an electrostatic spinning machine, meanwhile, a solution B is added, precipitates are generated on the surfaces of nanofibers at the moment when the spinning solution is sprayed into the alkaline solution through electrostatic spinning, so that the precipitates are rapidly fixed, and precipitation reaction can be generated in the fibers through a diffusion mechanism; the generated precursor not only is orderly arranged, but also has a porous structure, the rate capability of the electrode material is improved, an embedded structure can be formed between fibers, and the added lithium ion liquid is deposited on the surfaces of the fibers, so that the mechanical strength and the conductivity of the positive electrode material can be effectively improved; therefore, the material keeps stable in long-cycle use, and capacity attenuation is reduced.

The invention discloses an N-heterocyclic organic electrode material, a preparation method thereof and a water-based aluminum ion battery, and relates to the technical field of batteries, and the N-heterocyclic organic electrode material is a small molecule containing C = N and-CN active units synthesized through a dehydration condensation reaction. The invention also provides a preparation method of the N-heterocyclic organic electrode material and a water-based aluminum ion battery prepared from the N-heterocyclic organic electrode material. The raw materials used in the invention are green and environment-friendly, the price is low, the preparation process is simple, and the application prospect is good. And when the organic electrode material is used for manufacturing the positive electrode of the aluminum ion battery, the positive electrode has excellent specific capacity, good rate capability and outstanding long cycle stability, so that the aqueous aluminum ion battery has excellent electrochemical performance.

The invention discloses an interface modification method for preparing a negative-electrode-free lithium metal battery by utilizing ultraviolet polymerization tannic acid composite Ag particles. The interface modification method is used for solving the problems that a negative electrode of a negative-electrode-free lithium metal battery in the prior art is poor in lithium affinity, relatively large in nucleation obstruction, non-uniform in lithium deposition, relatively poor in lithium stripping / plating reversibility and the like. The method comprises the specific steps that the Cu foil is placed in hydrochloric acid to be shaken and oscillated, and then deionized water and ethyl alcohol are used for repeatedly cleaning the Cu foil for three times; and preparing a phosphate buffer solution. Dispersing tannic acid in a phosphate buffer solution to obtain a polymerization solution; and the cleaned Cu foil is placed in a polymerization solution and irradiated by an ultraviolet lamp, and the Cu foil with the poly-tannic acid film on the surface is obtained. And the copper foil with the tannic acid film on the surface is further placed in an AgNO3 solution for reaction, and then the Cu foil with the poly-tannic acid film interface compounded with Ag particles is obtained. The poly-tannic acid thin film compounded with the Ag particles improves the interface of the Cu foil to a certain degree. Compared with the prior art, the method has the advantages that the lithium nucleation obstruction and the lithium nucleation overpotential of the Cu foil negative electrode are reduced, and the reversibility of plating / stripping lithium is enhanced, so that an SEI film formed at a negative electrode interface is more stable. And moreover, the generation of lithium dendrites can be effectively inhibited, the cycle performance and safety of the battery are improved, and the cycle service life of the battery is prolonged.

The invention discloses an oxygen vacancy type Bi2O2CO3 / MIL-101-NH2 composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalytic oxidation and the field of water environment treatment. According to the composite catalyst provided by the invention, MIL-101-NH2 is loaded on the surface of Bi2O2CO3, so that a heterojunction structure rich in oxygen vacancies is formed; the Bi2O2CO3 is of a cluster flower-shaped structure with the diameter of 2 to 3 [mu] m; the MIL-101-NH2 is of a fusiform particle structure with the length of 500-1000 nm, is rich in oxygen vacancies, and is dispersed and loaded in the stamens of the Bi2O2CO3. The composite catalyst provided by the invention shows relatively high catalytic oxidation performance in a test of treating an antibiotic water body by photocatalytic activation of peroxymonosulfate (PMS), can effectively remove antibiotics in water within a short time, and has excellent application potential in antibiotic treatment.

The present invention provides a composite rechargeable magnesium battery electrolyte and a preparation method thereof. The electrolyte of the present invention contains an organic solvent, an electrolyte salt and an additive; during the preparation process, the raw materials are not subjected to any water removal and impurity removal pretreatment, and the electrolyte is obtained by directly stirring and mixing under an inert atmosphere at room temperature. The composite electrolyte of the present invention has high conductivity, low overpotential, high magnesium deposition-dissolution efficiency, and particularly high tolerance to water and impurities, which significantly reduces the cost of the electrolyte, simplifies the electrolyte preparation process, provides great convenience for the storage and use of the electrolyte, and contributes to the commercialization of rechargeable magnesium batteries.

The invention relates to the field of oxygen evolution reaction electrocatalysts, and discloses an oxygen evolution reaction electrocatalyst and a preparation method and application thereof. The invention discloses a method for preparing an oxygen evolution reaction electrocatalyst. The method comprises the following steps: (1) carrying out electrodeposition on a metal salt solution or metal molten salt on the surface of a metal substrate; (2) carrying out heat treatment on the electro-deposition product in the step (1); (3) mixing a heat treatment product obtained in the step (2) with a sulfur-containing compound for vulcanization; wherein the heat treatment condition comprises the steps that the temperature is increased to 300 DEG C or above at the speed of 1-5 DEG C / min, and the temperature is maintained for 1-5 h. The self-supporting oxygen evolution reaction electrocatalyst is synthesized, rich oxygen vacancies and heterostructures are successfully introduced through the vulcanization process, charge transfer of the oxygen evolution reaction is jointly enhanced, lower overpotential is shown under the same current density, stable operation can be achieved, and time is long.

The invention relates to a preparation method of an anode titanium-based porous transmission layer, and belongs to the technical field of electrochemistry. Comprising the following steps: S1, paving a titanium fiber felt through a dry method; s2, pretreating the metal precursor powder through polyethylene glycol, a cationic surface active agent, a coupling agent, polyvinyl alcohol and polyaniline; and S3, a metal composite material is deposited on the titanium fiber felt through a chemical vapor deposition technology, and the titanium-based porous transmission layer is obtained. The titanium-based conductive porous transmission layer prepared by the method has the characteristics of more uniform surface, lower roughness, lower interface contact resistance, higher corrosion resistance and longer service life. According to the technical scheme, the steps are simple, and operability is high.