118results about "Manganese compounds" patented technology

The invention discloses a high-entropy perovskite hydroxide, a preparation method thereof and application of the high-entropy perovskite hydroxide in electro-catalysis of nitrate to synthesize ammonia, and belongs to the technical field of high-entropy perovskite hydroxides. The high-entropy perovskite hydroxide is ASn (OH) 6, and A is one or more of Zn, Mn, Co, Ni and Cu. The high-entropy perovskite hydroxide electrocatalyst which is simple in synthesis method, stable in structure and easy in raw material obtaining is obtained, the electrocatalyst can be applied to electrocatalysis of nitrate to synthesize ammonia, the highest NH3 Faraday efficiency is 98.16%, and the yield is 5.12 mg h <-1 > mgcat <-1 >. And a foundation is laid for developing other high-entropy perovskite compounds as electrocatalysts for electrocatalytic synthesis of nitrate.

A positive electrode active material for secondary batteries contains a lithium-metal composite oxide having a rock-salt type crystal structure assignable to space group Fm-3m. The lithium-metal composite oxide contains at least Li and Mn. The average roundness of particles of the lithium-metal composite oxide is 0.55 or more.

The present invention relates to novel transition metal oxyfluoride compounds and methods for manufacturing said novel transition metal oxyfluorides. The inventors have demonstrated that by treating the transition metal oxides with a fluorine containing gas the corresponding transition metal oxyfluoride compounds are obtained.

This invention belongs to the field of soil manganese extraction technology, and discloses a stepwise extraction method and application for manganese species in soil. First, exchangeable manganese is extracted using magnesium chloride; then, manganese carbonate and sulfides are extracted using hydrochloric acid; next, active Mn(III) bound to organic matter is extracted using pyrophosphate solution under alkaline pH; then, manganese oxides are dissolved using hydroxylamine hydrochloride; and finally, manganese bound to crystalline iron and manganese oxides is extracted using sodium dithionite solution. This stepwise extraction scheme accurately quantifies the concentration of active Mn(III) species bound to organic matter in the soil. Experimental results show that the extraction method of this invention can effectively separate different forms of manganese in soil. In particular, PP extraction successfully distinguishes Mn(III) bound to organic matter without introducing interfering substances such as iron minerals that may interfere with dissolution.

The manufacturing method of the positive electrode active material for sodium-ion secondary batteries according to one aspect of the present application includes: a step of manufacturing black powder by processing a processed object, the processed object being a lithium-ion secondary battery having a positive electrode with a lithium-ion secondary battery positive electrode active material, or a module or a battery pack having the lithium-ion secondary battery, and having a component containing an iron element, the lithium-ion secondary battery positive electrode active material containing a transition metal element other than the iron element, the black powder containing the transition metal element and the iron element; and a step of manufacturing a sodium-ion secondary battery positive electrode active material containing the transition metal element and the iron element using the black powder as part of a raw material.

This invention relates to an atomic-level manufacturing method and apparatus for two-dimensional metal oxide nanosheets based on controllable micro-explosion, belonging to the field of functional nanomaterials and atomic-level precision manufacturing technology. This invention uses transition metal energetic complexes and energetic oxygen compounds as metal-oxygen integrated precursors. Under the constraint of an array-type nano-confined microcavity, controllable micro-explosions are synchronously triggered by nanosecond lasers to achieve nanosecond-level stoichiometric precision in the directional self-assembly of two-dimensional metal oxide nanosheets. The preparation cycle of this invention is reduced to less than 10 minutes, and the overall energy consumption is less than 1% of that of the traditional hydrothermal method. The product has excellent specific surface area, photocatalytic and cycling performance, and is 100% compatible with existing mass production lines. It is suitable for large-scale manufacturing in fields such as photocatalysis, energy storage, gas sensors, and environmental governance.

This invention discloses a composite modified lithium manganese oxide cathode material, its preparation method, and its applications, belonging to the field of cathode material technology. The structural formula of the composite modified lithium manganese oxide cathode material is: LiX a O b @LiYO2 / LiMn2O4, comprising: a core composed of LiYO2 and LiMn2O4, and LiX coating at least a portion of the surface of the core. a O b The coating layer; wherein: LiMn2O4 has a porous structure, and LiYO2 fills the channels of LiMn2O4. The cathode material in this invention uses lithium manganese oxide as a matrix, with LiYO2 filling the channels of the matrix, and LiX coated on the surface of the matrix. a O b Filling the pores with LiYO2 can reduce the Jahn-Teller effect of lithium manganese oxide without affecting the specific capacity of the cathode material. Moreover, LiYO2 can accelerate the lithium-ion diffusion rate, thereby improving the rate performance of the material.

The application belongs to the technical field of inorganic functional materials, and particularly relates to a layered transition metal sulfide with photoelectric response and a preparation method and application thereof. Cs2CO3, AgNO3, MnSO4.H2O and excess sulfur powder are weighed according to a proportion; a solvent is added, stirred uniformly, then moved into a heat-resistant glass tube and sealed; the sealed system is placed in a stainless steel reaction kettle for a solvothermal reaction; after the reaction is completed, the system is naturally cooled to room temperature, repeatedly washed with anhydrous ethanol, dried, and an orange-red square monocrystal Cs2Ag2Mn2S4 is obtained. The application is suitable for batch preparation in a laboratory, and has the advantages of mild conditions, general equipment, simple post-treatment and no toxic by-products.

The present disclosure relates to a solid-state battery including: an exterior portion and an insulating portion, in which at least one of the exterior portion and the insulating portion includes an oxide ceramic containing: Li; Mg; one or more elements MI selected from the group consisting of Group 4 and Group 5 elements; and one or more elements MII selected from the group consisting of transition metal elements.

A cathode composition comprising a lithium manganese oxide is described. The lithium manganese oxide has the general formula Li1+xMn1-xO2 wherein x is in the range of from 0.04 to 0.13; the lithium manganese oxide has a cubic crystal structure; and the unit cell length of the cubic crystal structure is at least 4.10 Å. An electrode incorporating the cathode composition, an electrochemical cell incorporating the electrode, and a method of preparing the cathode composition are also described.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M][Nb]y[O]z; wherein the active electrode material is oxygen deficient; wherein M consists of one of Mg, Cr, W, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; y satisfies 0.5≤y≤49; and z satisfies 4≤z≤124.

The present invention uses a positive electrode active material for secondary batteries, said positive electrode active material containing a lithium metal composite oxide that has a crystal structure based on a rock salt structure belonging to the space group Fm-3m. The lithium metal composite oxide contains at least one element A1 that is selected from the group consisting of Ca, Al and Si; and the total content of Ca, Al and Si contained in the lithium metal composite oxide is from 10 ppm to 1,000 ppm on a mass basis relative to the total amount of the lithium metal composite oxide.

The application relates to the technical field of battery materials, and discloses a lithium secondary battery positive electrode coating material as well as a preparation method and application thereof. 3+z Nb 1‑ x M x O 4‑y R y wherein M is selected from one of Fe, Ti, Mn, Mo, W, V, Ta and Cr; R is selected from one of F, Cl, Br and I; 0<=x<1, 0<=y<=4, and the values of x, y and z satisfy the charge balance of the positive electrode coating material. The application integrates the triple functions of thermodynamic interface protection, fast ion conduction and charge compensation in a single material through cation, anion or anion-cation co-doping design based on Li3NbO4 as a matrix; the positive electrode coating material can significantly reduce the solid-solid interface impedance in a full solid-state battery, improve the first circle coulomb efficiency, and greatly improve the long cycle stability of an electrode; meanwhile, the positive electrode coating material can effectively inhibit the decomposition of high-voltage electrolyte in a traditional liquid battery, and improve the cycle life of a positive electrode material.

This provides a new material that exhibits negative thermal expansion. [Solution] The negative thermal expansion material is Ti (3) 2-x M x O3(M contains at least one element selected from Mg, Al, Si, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, La, Ta, W, Bi, 0

The application discloses a kind of lithium manganese iron phosphate positive electrode material and its preparation method and application, belong to lithium ion battery positive electrode material technical field.Soft pyrolusite purification liquid is used as raw material, spherical trimanganese tetroxide is prepared, and is mixed with iron source, lithium source, phosphorus source, carbon source and solvent wet grinding, granulation, then high-temperature solid-phase sintering, namely lithium manganese iron phosphate positive electrode material is obtained.The application uses soft pyrolusite as raw material, and spherical trimanganese tetroxide is prepared, which combines resource utilization with material morphology control.The spherical Mn3O4 obtained presents regular microspherical morphology assembled by smaller nano-structured units.Preparing lithium manganese iron phosphate using spherical trimanganese tetroxide as manganese source can fully exert the morphology advantage of spherical trimanganese tetroxide.The preparation method of the application realizes atomic-level uniform mixing and reaction of elements, and finally obtains LMFP positive electrode material with excellent cycle stability and rate performance with the assistance of carbon source.

The application relates to the technical field of disordered rock salt preparation, and discloses application of an organic carboxylic acid with a dipole moment of 3-15 D, a polarizability of 30-120 and an average electrostatic potential of -1.1 to 1.1 as a chelating agent in sol-gel preparation of disordered rock salt. By selecting the organic carboxylic acid with the specific range of physicochemical parameters as the chelating agent, defects in the disordered rock salt can be effectively eliminated, the crystallinity and morphology of the disordered rock salt are improved, and the electrochemical performance of a battery prepared by using the disordered rock salt as an electrode active material is improved. The application further discloses a sol-gel preparation method of disordered rock salt, the disordered rock salt and the battery.

This invention discloses a composite nanozyme and a kit for simultaneous recognition of multiple exosomes. The kit includes an aptamer / composite nanozyme solution, exosome standards, TMB substrate solution, H2O2 solution, and 96-well plate enzyme labeling strips. This invention innovatively utilizes Ti3C2T... x A nanozyme (MX-MnNF) formed by combining MXene nanosheets and MnO2 nanoflowers was constructed, and a colorimetric sensor array was built by modifying it with three aptamers: EpCAM, MUC1, and HER2. Based on the peroxidase-like activity of the nanozyme, it can catalyze the TMB-H2O2 reaction to produce color changes, enabling the simultaneous recognition of multiple exosomes. This method can complete the detection within 10 minutes, with a detection sensitivity of up to 10 particles / mL and an accuracy of up to 95% for clinical samples. It has the advantages of simple operation, rapid detection, and high sensitivity, providing a new technical means for tumor liquid biopsy.

The application relates to the technical field of alumina ball preparation, in particular to a preparation method of high-strength potassium permanganate alumina ball, which comprises the following steps: S1. adding an aluminum salt into deionized water to obtain an aluminum salt solution; S2. adding lye into the aluminum salt solution to adjust pH to obtain an aluminum hydroxide slurry; S3. preparing a silicic acid sol; S4. adding the silicic acid sol obtained in the step S3 into the aluminum hydroxide slurry obtained in the step S2, then adding modified polyethylene glycol, and performing ball milling to obtain a mixed liquid; S5. dropping the mixed liquid in the step S4 into an oil ammonia column to obtain alumina balls; and S6. adding potassium permanganate and modified polyethylene glycol into deionized water, stirring at room temperature for 10-20 min, then adding the alumina balls obtained in the step S5, and performing ultrasonic immersion to obtain potassium permanganate alumina balls. The prepared potassium permanganate alumina ball has high strength, high potassium permanganate loading capacity and good purification effect.

This reduces the resistance of the positive electrode active material having a P2 type structure. [Solution] The active material secondary particles of the present disclosure include a plurality of primary particles, each of which has a P2 type structure, and each of which contains at least Na, a first doping element, a transition metal element, a second doping element, and O as constituent elements, wherein the first doping element is Ca, the first doping element is included in the Na layer in the P2 type structure, the transition metal element includes one or both of Mn and Ni, the second doping element is one or more of B, Mg, and Al, the second doping element is included in the transition metal element layer in the P2 type structure, and the average particle diameter of the primary particles is 2.0 μm or less.

The application discloses a preparation method of chiral manganese dioxide enantiomer nanozyme and application thereof, and belongs to the technical field of functional material synthesis. The preparation method comprises the following steps: placing a mixture alkaline aqueous solution containing a manganese source, a chiral ligand, a template agent and an alkali in a closed container, and reacting to obtain the chiral manganese dioxide enantiomer nanozyme; the chiral ligand is selected from L-tartaric acid and / or D-tartaric acid; and the template agent is selected from a cationic surfactant. The chiral manganese dioxide nanozyme prepared in the application has significant peroxidase activity and oxidase activity.

This invention provides a multifunctional halide material, its preparation method, and its application; the multifunctional halide material includes at least one of the following: (I) Li 2‑x M 1‑x A x Cl4;(II) Li 2‑x M' 1‑ x A x Cl4;(II)Li 2‑x M'' 1‑x A x Cl 4‑3x E 3x The multifunctional halide material of this invention possesses both high ionic conductivity and partially reversible delithiation capability, providing additional lithium ions to achieve a lithium replenishment effect.

The present invention relates to a positive electrode active material for secondary batteries, the positive electrode active material containing a lithium metal composite oxide having a crystalline structure that can belong to a space group Fm-3m. The lithium metal composite oxide contains Li, a first electropositive element M1, and a second electropositive element M2. The first electropositive element M1 includes at least Mn, Mn accounts for 50 atom% or more of the M1, the M2 comprises at least one selected from the group consisting of Fe, Ca, Cr, Na, Al, Si, Mg, Cu, Zn, Pb, and Sb, the content of the M2 in the lithium metal composite oxide is 10-1000 ppm by mass, and the average particle diameter D50 of the lithium metal composite oxide is 1 μm or less.

The present invention relates to a lithium-lanthanum zirconium composite oxide solid electrolyte doped on the grain boundary and surface, and its preparation method and application. By using a stepwise doping method, some doping elements are located on the grain boundary and surface of the lithium-lanthanum zirconium composite oxide solid electrolyte, improving the distribution state of the doping elements on the grain boundary, reducing the number of grain boundaries, reducing the grain boundary resistance of the lithium-lanthanum zirconium composite oxide, and making it obtain high ionic conductivity. The doping method used has the advantages of simple process, low cost and high versatility, can meet the demand for doping elements of different solid electrolytes, and is suitable for large-scale application. The solid electrolyte obtained by adopting the technical solution of the present invention can be used in the fields of all-solid-state lithium metal or lithium ion batteries, semi-solid lithium ion batteries, lithium air batteries, etc.

The present application relates to a kind of stability and good photocatalytic performance of lead-free double perovskite microcrystal and its preparation method and application, belong to the preparation technical field of perovskite microcrystal.The lead-free double perovskite microcrystal of the present application is mainly Cs4MnSb2Cl 12 Microcrystal or Cs4Mn 0.7 Cu 0.3 Sb2Cl 12 Any one in microcrystal.The lead-free double perovskite microcrystal of the present application has good photocatalytic performance, with excellent stability, high purity and other advantages, shows great application potential in photocatalysis field.In addition, the preparation method of the present application is simple, easy to operate, low in equipment requirements, low in cost, low in energy consumption, suitable for large-scale production.

The application provides a lithium-rich manganese-based positive electrode material and a preparation method and battery thereof, the lithium-rich manganese-based positive electrode material is fused by primary particles to form secondary particles, wherein recesses exist, the depth H of the recesses satisfies: the proportion of the secondary particles with 0nm The application controls the size of the recesses of the secondary particles accurately, suppresses the interface side reaction, effectively improves the stability and conductive performance of the material, reduces the resistance, and improves the performance of the material under large-rate charging.

This positive electrode active material for secondary batteries contains a lithium metal composite oxide that has a crystal structure based on a rock salt structure belonging to the space group Fm-3m. The lithium metal composite oxide contains a first metal element other than Li, and a second metal element other than Li and the first metal element. The first metal element is at least one element selected from the group consisting of Gd, Ce, Eu, Sm, and Yb.

Device (100) for producing an active material composite powder (30) by coating surfaces of active material particles or composite particles obtained by coating the surfaces of the active material particles (31) with an oxide-based solid electrolyte (32) with a sulfide-based solid electrolyte (33), wherein the device (100) comprises: a storage body (11) which has a cylindrical inner wall surface (12), and a rotating body (13) which is arranged in an interior space which is surrounded by the inner wall surface (12) of the storage body (11), which has a rotating shaft (14) which is aligned with a central axis (X) of the interior space, and which has a plurality of leaves (15), wherein an end part (19) of each sheet (15) has on a front side in a direction of rotation of the rotating body (13) such that a thickness (24) of the sheet (15) gradually tapers towards a sheet end side, characterized by the fact that the end part (19) of each sheet (15) on a back side in the direction of rotation of the rotating body (13) has such a curved end surface (21) that the curved end surface (21) faces the inner wall surface (12) of the storage body (11) and is generally parallel to the inner wall surface (12) of the storage body (11), and a width (23) of the curved end surface (21) of the end part (19) of each sheet (15) lies in a range of 1 / 3 to 0.7 relative to the thickness (24) of the sheet (15).