27results about "Manganese halides" patented technology

The invention discloses a method for extracting and recovering metal elements in lithium batteries using a chlorination method, which belongs to the technical field of lithium battery recovery. The method comprises the following steps: step 1, calcining the positive electrode sheet of the lithium battery to remove organic matter, and peeling off the aluminum foil to obtain electrode material powder; step 2, placing the electrode material powder on a carrier of a Joule heat device, and performing a thermal shock treatment under a chlorine atmosphere, and the treatment process is staged by stage heating and chlorination; step 3, desublimating the gas generated after chlorination in each stage; step 4, adding the solid after desublimation in each stage to deionized water, adding a sodium carbonate aqueous solution after mixing, collecting the precipitate, washing and drying to obtain a metal salt product. The present invention is based on the characteristics of Joule heat that can heat quickly and accurately control the temperature, combined with the difference in the temperature of the chlorination reaction of different metal oxides and the gasification temperature of the chlorination product, to achieve staged gasification and desublimation treatment, obtain different metal chlorides, and purify accurately and efficiently.

The application discloses composite basic manganese chloride and a preparation method and application thereof, and belongs to the technical field of inorganic chemical product preparation. The raw materials used in the preparation method are widely sourced, are lower in price, and the production process steps are simple, the yield is high, and thus the production cost is low. In addition, the preparation method contains a impurity removal step, the harmful ion content of the finally obtained basic manganese chloride product is extremely low, and after use, the product does not have adverse effects on animals and plants. Moreover, in the preparation process, a crystal nucleus agent and a surfactant are introduced, which not only can obtain a product with narrow and uniform particle size distribution, but also can introduce specific nutrient components in the product, can avoid the generation of high-valence manganese components in the drying process, and make the obtained product more easily absorbed and utilized by animals and plants, so that the obtained product can be better used as feed or plant fertilizer.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is characterized by being a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m. In the general formula, TM represents a transition metal; M represents a non-transition metal; x, tm, y and f satisfy 1.75 ≤ x + tm + y ≤ 2 and 0 < f ≤ 0.7; and if Q = 2 × tm × (1 - (1 - f / 2)5), 0.8 ≤ Q ≤ 1.5 is satisfied.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q = 2 × tm × (1 - (1 - f / 2)5), Q ≥ 1 is satisfied. With respect to a dV / dq-SOC curve showing the relationship between the state of charge SOC and dV / dq of a half cell that contains this composite oxide, the dV / dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25°C to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 40% to 70%.

A positive electrode active material, a method for preparing the positive electrode active material, a positive electrode including the positive electrode active material, and a rechargeable battery (e.g., a rechargeable lithium battery) including the positive electrode are disclosed. The positive electrode active material may have a disordered rocksalt structure. The positive electrode active material may include a compound represented by Chemical Formula 1, wherein a ratio of M1 having an oxidation number of +2 is less than or equal to about 25 at %, based on a total of 100 at % of M1.

A positive electrode active material, a method for preparing the positive electrode active material, a positive electrode including the positive electrode active material, and a rechargeable battery (e.g., a rechargeable lithium battery) including the positive electrode are disclosed. The positive electrode active material may have a disordered rock salt structure. The positive electrode active material may include a compound represented by Chemical Formula 1, where a proportion of M1 having an oxidation number of + 2 is less than or equal to about 25 at% based on a total of 100 at% of M1.

The invention discloses composite basic manganese chloride as well as a preparation method and application thereof, and belongs to the technical field of preparation of inorganic chemical products. The raw materials used in the preparation method are wide in source and lower in price, and the production process is simple in step and high in yield, so that the production cost is low; in addition, the preparation method provided by the invention comprises an impurity removal step, the content of harmful ions in the finally obtained basic manganese chloride product is extremely low, and adverse effects on animals and plants are not generated after the basic manganese chloride product is used; a nucleating agent and a surfactant are introduced in the preparation process, so that the product with a narrow and uniform particle size distribution range can be obtained, specific nutritional ingredients can be introduced into the product, and meanwhile, high-valence manganese ingredients can be prevented from being generated in the drying process, so that the obtained product is more easily absorbed and utilized by animals and plants; therefore, the obtained product can be better used as feed or plant fertilizer.

The invention provides a pyrotechnic composition as well as a preparation method and application thereof, and the pyrotechnic composition comprises 20-50% of fuel, 40-70% of oxidant and 3-10% of energetic additive based on the total weight of the pyrotechnic composition being 100%, wherein the energetic additive is nano manganese difluoride and is granular, and the average diameter of the energetic additive is smaller than 300 nm. The pyrotechnic composition provided by the invention has the advantages of high reaction rate, high energy output, high gas yield and the like.

The present invention belongs to the technical field of fluorescent materials, and discloses a reduction-coprecipitation preparation method and application of (NH4)2MnF6. KMnO4 and NH4HF2 / NH4F are added to hydrofluoric acid to obtain system A; the H2O2 solution is added to system A in the following manner (i) or (ii) to obtain system B; manner (i): the H2O2 solution is added every 3 minutes, and 20-30 μL is added each time; manner (ii): the H2O2 solution is added every 1 minute first, and 0.2-0.5 mL is added each time, and the total addition amount is 1-1.5 mL; after stirring for 20-30 minutes, the addition of the H2O2 solution is changed to every 3 minutes, and 20-30 μL is added each time; after the system B is subjected to solid-liquid separation, the precipitate obtained from the solid-liquid separation is collected, washed and dried to obtain the target product. The present invention adopts the reduction-coprecipitation method, which has low requirements for equipment and synthesis conditions and a relatively simple process; using (NH4)2MnF6 as a manganese source for Mn 4+ When synthesizing the activated fluoride fluorescent crystal, the amount of hydrofluoric acid required to dissolve it is greatly reduced, which is beneficial to improving the yield of the fluorescent crystal.

The invention discloses a preparation method of a MnF2 / carbon composite material for a sodium battery and belongs to the field of sodium ion batteries. The MnF2 / carbon composite material is prepared by adopting a room-temperature liquid phase method and annealing treatment, taking manganese acetylacetonate as a manganese source, polyvinylidene fluoride as a fluorine source and a carbon source and dicyanodiamine as a pore-forming agent, stirring at room temperature, drying, directly annealing at 600 DEG C, and sintering for 1 hour. The material is composed of a carbon skeleton and particles which grow on the carbon skeleton and have different particle sizes. When the material is used as a negative electrode material of a sodium battery for an electrochemical performance test, the initial specific capacity of the material is 313.06 mAh / g (0.1 A / g), the specific capacity is still 362.72 mAh / g after 130 times of circulation, and the specific capacity of 224.98 mAh / g can still be provided even when the specific capacity is 5.0 A / g. The MnF2 / carbon composite material prepared by the invention has the characteristics of high specific capacity, good cycle performance, simple preparation method, safety and the like.

Compositions suitable for reversibly storing heat in thermal energy systems (TES) include a salt hydrate represented by the formula: MXq·nH2O. M is a cation selected from Groups 1 to 14 of the IUPAC Periodic Table, X is a halide of Group 17, q ranges from 1 to 4, and n ranges from 1 to 12. The cation (M) may have an electronegativity of ≤ about 1.8 and a molar mass ≤ about 28 g / mol. The anion (X) may have an electronegativity of ≥about 2.9 to ≤ about 3.2. A distance between a cation (M) and coordinating water molecules (H2O) is ≤ about 2.1 Å. Thermal energy systems (TES) incorporating such compositions are also provided that are configured to reversibly store heat in the thermal energy system (TES) via an endothermic dehydration reaction and to release heat in in the thermal energy system (TES) via an exothermic hydration reaction.

The application discloses a system and method for directional co-production of high-purity manganese sulfate, manganese fluoride and potassium sulfate from blast furnace ferromanganese dust, and the system comprises a reduction leaching unit, an extraction defluorination unit, a deimpurity unit, an extraction demanganese unit, an ammonia recovery and circulation unit and a purification and salt separation unit which are sequentially and serially arranged. According to the characteristics of impurities contained in blast furnace ferromanganese smelting dust washing wastewater, the valuable elements in the ash are extracted and preliminarily deimpurified through reduction leaching, high-value manganese fluoride and manganese sulfate are obtained through extraction defluorination and extraction demanganese recovery, deamination is realized through ammonia recovery, good saponification conditions are provided for manganese extraction, and good prerequisites are created for obtaining high-purity potassium sulfate and sodium chloride through pH adjustment, purification and salt separation. The application can improve the purity of target products at low cost without introducing impurities and causing secondary pollution, the whole process is free of wastewater and waste gas emission, the economic value is high, and the application meets the green and environment-friendly production requirements.

The present invention relates to novel transition metal oxyfluoride compounds and to a process for the production of said novel transition metal oxyfluoride compounds. The present inventors have shown that by treating transition metal oxides with a fluorine containing gas, the corresponding transition metal oxyfluoride compounds are obtained.

The invention discloses a sodium ion positive electrode material. The general formula of the sodium ion positive electrode material is Na < 0.67 > MO < 2-x > Fx, a part of oxygen atoms in Na0. 67MO2 are substituted by fluorine, and a P phase / tunnel phase composite phase is provided; wherein M represents a transition metal, and x is 0.7 or less and greater than 0. The preparation method of the sodium ion positive electrode material comprises the following steps: mixing a transition metal source precursor, a sodium source and a fluorine source, and carrying out calcination reaction for 12-18 hours at 800-1000 DEG C in an oxygen-containing atmosphere to obtain the sodium ion positive electrode material. The sodium ion positive electrode material provided by the invention not only maintains high capacity of a P phase, but also has high structural stability.

The invention provides a basic manganese chloride preparation device and a preparation method, which relate to the technical field of manganese chloride preparation, and include a reaction mechanism; the mixing mechanism is installed on the reaction mechanism; the multifunctional mechanism is installed on the reaction mechanism; the spray drying mechanism is installed on the mixing mechanism and the multifunctional mechanism; the dispersion mechanism is installed on the front side of the reaction mechanism; four flow holes A and four flow holes B are opened on the front side of the reactor base; four one-way valves A are provided in total, and the four one-way valves A are fixedly installed in the four flow holes B; the reactor top cover is installed on the top of the reactor base by screws; the invention plays a secondary mixing role on the materials in the reactor base, which is beneficial to improving the reaction efficiency; and solves the problem that the materials are generally stirred and mixed only by stirring blades, and the stirring of the materials cannot be assisted, resulting in low reaction efficiency.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMy2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q = 2 × tm × (1 - (1 - f / 2)5), Q < 1 is satisfied. With respect to a dV / dq-SOC curve showing the relationship between the state of charge SOC and dV / dq of a half cell that contains this composite oxide, the dV / dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25°C to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 10% to 40%.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is characterized by being a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m. In the general formula, TM represents a transition metal; M represents a non-transition metal; x, tm, y and f satisfy 1.75 ≤ x + tm + y ≤ 2 and 0 < f ≤ 0.7; and if Q = 2 × tm × (1 - (1 - f / 2)5), 0.8 ≤ Q ≤ 1.5 is satisfied.

A positive electrode active material for a nonaqueous electrolyte secondary battery contains: a compound having a rock-salt related structure, a composition formula Li a Mn b M c O 2‑X F x (in the formula, M is at least one metal element other than Li, Mn, and 2.000

The invention discloses a lithium ion battery nano-material, and particularly relates to the field of electrochemical energy storage materials, the lithium ion battery nano-material comprises a transition metal fluoride nano-particle core, the chemical formula of which is MF2; the carbon-based conductive layer coats the inner core, and the carbon-based conductive layer comprises a composite network structure of a graphene sheet layer and a nitrogen-doped carbon nanotube; the surface of the composite nano material has a hierarchical porous structure; gradient concentration distribution of magnesium elements is introduced into a transition metal fluoride core, and lattice distortion in the charging and discharging process is restrained through the lattice pinning effect of Mg < 2 + >; a vertical orientation composite conductive layer is arranged, and a template-induced orientation assembly technology is adopted, so that an electron transmission path is shortened, and the overall electron conductivity of the material is improved to 118S / cm; a laser etching graded porous structure is arranged, a'macroscopic-mesoscopic-microscopic 'three-level pore channel is constructed, macropores buffer volume stress, mesopores provide ion high-speed channels, and ultramicropores adsorb electrolyte to form local ion concentration gradient, so that the diffusion coefficient of lithium ions is increased.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMy2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q = 2 × tm × (1 - (1 - f / 2)5), Q < 1 is satisfied. With respect to a dV / dq-SOC curve showing the relationship between the state of charge SOC and dV / dq of a half cell that contains this composite oxide, the dV / dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25°C to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 10% to 40%.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q = 2 × tm × (1 - (1 - f / 2)5), Q ≥ 1 is satisfied. With respect to a dV / dq-SOC curve showing the relationship between the state of charge SOC and dV / dq of a half cell that contains this composite oxide, the dV / dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25°C to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 40% to 70%.

One embodiment provides a cathode active material having a disordered rock salt structure, improving the migration rate of lithium ions, and enabling excellent capacity characteristics and life characteristics, a cathode including the same, and a secondary battery. 【Solution means】A cathode active material having a disordered rock salt structure and containing a compound represented by Chemical Formula 1, where M 1 has an oxidation number of +2 for the whole, 1 provides a cathode active material with a ratio of 25 at% or less, a method for producing the same, a cathode, and a secondary battery. [Chemical Formula 1] A x M 1 2-x-y M 2 y O 2-a X a (In Chemical Formula 1, A is one or more elements selected from Li and Na, M 1 is one or more elements selected from Mn, Fe, Co, Ni, Cr, and V, M 2 is one or more elements selected from Ti, Zr, Nb, Mo, Ta, and W, X is a halogen element, x / (2 - x)>1.1, 0

The invention discloses a preparation method of a MnF2 / MXene composite material and an application of the MnF2 / MXene composite material in a lithium ion battery, according to the preparation method provided by the invention, the MXene-loaded MnF2 or MnO composite material is prepared by combining simple and convenient acid etching with a high-temperature solvothermal method, and the deposition and nucleation of MnF2 or MnO are induced by utilizing a fluorine / oxygen-rich and defect-rich environment on the surface of an MXene sheet layer; according to the MnF2 / MXene composite material obtained by the method, on one hand, double advantages of high conductivity and rapid pseudocapacitance lithium storage mechanism of MXene and high energy density brought by a conversion lithium storage mechanism of Mn (II) are combined, and the MnF2 / MXene composite material has high energy density and excellent charge transfer performance; and on the other hand, due to conversion of surface functional groups and defects of MXene, the problem of capacity fading is effectively improved. In addition, the excellent mechanical property of MXene can effectively inhibit the volume expansion effect of Mn (II) in the lithium storage process, and the cycle stability of the electrode is improved.

Removing metal from metal-carbon material includes contacting the metal-carbon material with hydrogen chloride, thereby yielding a metal chloride in the gas phase and a solid product comprising carbon. The metal-carbon material and the solid product may both contain elemental carbon. A concentration of metal in the solid product is typically less than 1 wt%.

The invention discloses an industrial waste hydrochloric acid purification device and a purification method thereof, comprising a purification tank, a hydrochloric acid inlet, a hydrochloric acid outlet, and also comprising: a resin storage structure, comprising a bearing basket arranged in the middle of the purification tank, the bearing basket comprising a bearing area for bearing resin, and a flow area for allowing hydrochloric acid to pass through, the lower end of the bearing area is connected to a connecting pipe, the connecting pipe penetrates to the outside of the purification tank, a material guide cylinder is arranged on the connecting pipe located at the outer part of the purification tank, a punching piece is arranged at the end of the connecting pipe, and a heat preservation component is arranged in the connecting pipe; a supporting shaking material structure, comprising an external bonding component arranged on the outer side of the bearing basket, a shaking shaft is fixedly connected to the top of the external bonding component, and an oscillation component is arranged on the top of the shaking shaft. The invention can use waste acid to purify and recycle ternary battery powder, and can use resin to reduce alkali consumption during neutralization, and can also be more convenient during recycling and regeneration.

The invention discloses a preparation method of a porous micron metal fluoride composite positive electrode material modified by carbon nanodots and application of the porous micron metal fluoride composite positive electrode material in a lithium ion battery. Taking carbon nanodot modified porous micron ferrous fluoride as an example, the material is prepared through a stepped in-situ synthesis strategy: a three-dimensional porous iron trifluoride skeleton is constructed by combining a liquid phase method with low-temperature calcination, and carbon nanodots are deposited and anchored in an acetylene atmosphere by using a chemical vapor deposition technology. According to the composite structure, the advantage of high volume energy density of a porous micron material is combined with a continuous conductive network constructed by carbon nanodots, and the inherent problems of poor conductivity and slow ion transmission of a traditional metal fluoride material are solved. The process is simple and controllable, a new thought is provided for development of the positive electrode material of the high-performance lithium ion battery, the industrial application potential is achieved, and meanwhile the wide popularization value is achieved in the aspect of synthesis methodology.

The invention discloses an industrial preparation process of an optical-grade fluoride salt product, and relates to the technical field of fluoride salt products, and the industrial preparation process comprises the following steps: (1) obtaining a chloride salt solution; (2) obtaining an intermediate reaction solution; (3) obtaining a sodium fluoborate solution; (4) obtaining a mixed solution; (5) obtaining a reaction system; (6) obtaining a primary reaction material; (7) carrying out modification treatment on the primary reaction material to obtain an optical-grade fluoride salt product; the prepared optical-grade fluoride salt product can be applied to optical glass, and the stability performance of the optical glass can be greatly improved.