13results about "Manganese halides" patented technology

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 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 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.

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 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

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.

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.