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2525 results about "Manganese oxide" patented technology

Manganese oxide is any of a variety of manganese oxides and hydroxides. These include Manganese(II) oxide, MnO (aka Ferrite Grade); Manganese(II,III) oxide, Mn 3 O 4; Manganese(III) oxide, Mn 2 O 3; Manganese dioxide, (manganese(IV) oxide), MnO 2; Manganese(VI) oxide, MnO 3; Manganese(VII) oxide, Mn 2 O 7; It may refer more specifically to the following manganese minerals:

Low-temperature smoke denitration SCR (silicon controlled rectifier) catalyst and preparation method

The invention relates to a low-temperature smoke denitration SCR (silicon controlled rectifier) catalyst, which comprises a carrier, a manganese oxide, and composite oxide of one or more of Ce, Zr, Ti, Co, Fe and Cu, the mass content of manganese is 0.1-66 percent, and the total mass content of the Ce, Zr, Ti, Co, Fe or/and Cu is 0-50 percent; and glass fiber and/or kieselguhr is used as the carrier, wherein the glass fiber of the carrier is calcined for 2-4 hours at temperature of 400-600 DEG C, then placed in a nitric acid, sulfuric acid or hydrochloric acid solution with mass concentration of 5-40 percent for acidizing for 1-8 hours, washed by distilled water to be neutered, dried at temperature of 80-120 DEG C, and crushed to have the fineness of 20-325 meshes. The catalyst uses the glass fiber and the kieselguhr as the carriers, so that the dispersion effect of nanoparticles and specific surface area of the catalyst are increased, the high adsorptive capacity and strong heat resistance and corrosion resistance capacity are achieved, stronger toxic resistance capacity to sulfur dioxide and stream contained in the smoke is realized, the invention can be used for 10-200 DEG C of low temperature smoke denitration, and has strong water resisting and sulphur toxic resisting capacities.
Owner:GUODIAN SCI & TECH RES INST +1

Method for preparing nickel and cobalt doped lithium manganate by using waste and old lithium ionic cell as raw material

InactiveCN101450815ASimultaneous recyclingShort processManganates/permanganatesManganateManganese oxide
The invention discloses a method for preparing lithium nickel cobalt manganese oxide by taking a waste lithium ion battery as a raw material. The method is mainly characterized in that a waste lithium ion battery taking the lithium nickel cobalt manganese oxide, lithium nickel cobalt oxide and so on as a battery positive material is selected as the raw material and is pretreated through disassembly, separation, crushing, screening and so on, and then processes such as adhesive removal at high temperature and aluminum removal by sodium hydroxide are adopted to obtain an inactivated positive material containing nickel, cobalt and manganese; then a sulfuric acid and hydrogen peroxide system is adopted to leach, and P204 is adopted to remove impurities by extraction to obtain pure nickel, cobalt and manganese solution, and proper manganese sulfate, nickel sulfate or cobalt sulfate is blended to ensure that the mol ratio of nickel, cobalt and manganese elements in the solution is 1: 1: 1; and then ammonium carbonate is adopted to adjust the pH value to form a nickel cobalt manganese carbonate precursor, and then a proper amount of lithium carbonate is blended for high temperature sintering to synthesize a lithium nickel cobalt manganese oxide battery material. The first discharge capacity of the material is 150 mAh/g, the discharge capacity is still kept more than 130mAh/g after the circulation for 30 times, and the material has good electrochemical performance.
Owner:GUANGDONG BRUNP RECYCLING TECH +1

Full-component resource reclamation method for waste positive electrode materials of lithium ion batteries

The invention provides a full-component resource reclamation method for waste positive electrode materials of lithium ion batteries. The method comprises the following steps: 1) separating active substances and aluminum foils in waste positive electrode materials of lithium ion batteries by using an aqueous solution of fluorine-containing organic acid and carrying out liquid-solid-solid separation so as to obtain leachate, the lithium-containing active substances and the aluminum foils; 2) respectively carrying out high temperature roasting and impurity removal with alkali liquor on the lithium-containing active substances; 3) respectively carrying out recovery of the fluorine-containing organic acid through addition of acid and distillation, deposition of impurity ions through addition of alkali and ammonium carbonate coprecipitation on the leachate so as to prepare nickel-cobalt-manganese carbonate ternary precursor; and 4) carrying out component regulation on a mixture of the treated active substances and the nickel-cobalt-manganese carbonate ternary precursor, adding lithium carbonate in a certain proportion and carrying out high temperature solid phase sintering so as to prepare a lithium nickel cobalt manganese oxide ternary positive electrode material. The method provided in the invention has the following advantages: the application scope of the method is wide; separation efficiency of the lithium-containing active substances and the aluminum foils is high; short-flow direct re-preparation of positive electrode materials in waste lithium ion batteries is realized; and the method is applicable to large-scale resource reclamation of waste lithium ion batteries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Lithium ion battery and multi-element positive material thereof as well as preparation method of multi-element positive material

ActiveCN103500827AAffect capacity playInfluence factorSecondary cellsNon-aqueous electrolyte accumulator electrodesTi dopingManganese oxide
The invention discloses a lithium ion battery and a multi-element positive material thereof as well as a preparation method for the multi-element positive material. The chemical general formula of the multi-element positive material is LixNiaCobMncNyO2, wherein N is one of Ti, Mg and Al; x is more than or equal to 1.0 and less than or equal to 1.15; a is more than 0 and less than 1; b is more than 0 and less than 1; c is more than 0 and less than 1; y is more than or equal to 0.003 and less than or equal to 0.07; the sum of a, b, c and y is equal to 1. The multi-element positive material with a layered structure comprises a kernel pure phase layer containing lithium cobalt nickel manganese oxide, a surface doped layer containing a doped element Ti, an oxide surface cladding layer containing a cladding element Al and a shallow surface doped transitional layer which is positioned between the surface doped layer and the surface cladding layer and contains a doped element Mg. The preparation method of the multi-element positive material comprises the steps of synthesizing a multi-element precursor of which a body phase contains nickel, cobalt and manganese, then performing Ti doping and lithium treatment on the surface of a precursor liquid phase, and finally, doping Mg on the surface by a pyrogenic process and performing Al2O3 cladding treatment to obtain the composite modified multi-element lithium ion positive material.
Owner:NINGDE AMPEREX TECH

Preparation method of nano porous metal oxide/carbon lithium ion battery cathode material

The invention provides a preparation method of a nano porous metal oxide/carbon lithium ion battery cathode material. The preparation method comprises the following steps: firstly, weighting ferric salt or manganese salt and carboxylate organic ligands, and putting into a high-pressure reaction kettle; and after a polar solvent is added and dissolved, carrying out a hydrothermal reaction for 10-72h at 100-180 DEG C to generate a transition metal coordination polymer precursor; and after the transition metal coordination polymer precursor is washed and dried, decomposing the precursor for 0.5-6h at a temperature of 300-600 DEG C in an inert atmosphere in a tube furnace, thus obtaining a nano porous metal oxide/carbon lithium ion battery cathode material containing iron oxides or manganese oxides. According to the preparation method, since the transition metal coordination polymer precursor which is structurally designable and controllable is used as a template-type precursor, a nano porous metal oxide/carbon lithium ion battery cathode material is obtained by using an in-situ thermal decomposition method. The method is simple in process, and the obtained products have the advantages of high electrical conductivity, high specific capacity, good cycle stability, excellent high-ratio discharge performance and high energy density.
Owner:JIANGSU UNIV

Ultrahigh-capacity lithium ion battery anode material prepared by microwave method and preparation method thereof

The invention discloses an ultrahigh-capacity lithium ion battery anode material prepared by a microwave method and a preparation method thereof. The method comprises the following steps: mechanically or chemically and uniformly mixing the hydroxide, oxide or salt containing lithium with the hydroxide, oxide or salt containing transition metal M, the hydroxide, oxide or salt containing doped metal M' and additives in a certain proportion; and then putting the mixture into an atmosphere furnace, performing heat treatment on the mixture so as to acquire the required laminar materials rich in lithium and manganese oxides. According to the invention, heating with microwave is adopted, thus not only can the heating time is shortened, and the heat use ratio is increased, but also the heat treatment is even, so that the problems of the traditional heating method that the heating is uneven, the heating time is long, the temperature is high and the like are all solved. Besides, the prepared ultrahigh-capacity lithium ion battery cathode material, namely the laminar materials rich in lithium and manganese oxides, contains no impurity phase, and has the characteristics of uniform mean grain size, excellent circulating property and excellent electrochemical performance. The preparing method provided by the invention has the advantages of simple process, low preparation cost, energy conservation, high efficiency and suitability for industrial production.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Self-discharge screening method for lithium ion phosphate battery

ActiveCN102117937ASolving the Difficult Problem of Self-Discharge ScreeningImprove consistencyFinal product manufactureElectrolyte accumulators manufacturePhosphateScreening method
The invention discloses a self-discharge screening method for a lithium ion phosphate battery, belongs to the technical field of lithium ion batteries, and aims to provide a method for effectively screening the lithium ion phosphate battery with high self-discharge rate by using shelving in a charging state. According to the technical key points, the method comprises the following steps of: adding laminar lithium nickel cobalt manganese oxide or spinel lithium nickel manganese oxide which comprises 0.5 to 5 weight percent of lithium ion phosphate and has high voltage platform into a lithium ion phosphate-containing compound positive electrode; assembling the lithium ion phosphate battery by taking graphite as a negative electrode; fully charging the battery and then shelving the battery at an ambient temperature of between 20 and 45 DEG C; recording voltages before and after the shelf and shelf time; calculating the voltage difference before and after the shelf or a voltage variation value in unit time; and determining a critical value of the voltage difference of the batteries with the high self-discharge rate which are shelved in the same period or voltage variation in the unit time, and determining that the self-discharge rate of the battery of which the voltage difference or the voltage variation value in the unit time is greater than the critical value is high.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Blast-furnace smelting method for vanadium titano-magnetite

The invention discloses a blast-furnace smelting method for vanadium titano-magnetite. The method is realized in a way that: vanadium titano-magnetite accounts for 30-60% of ferrous burden which is fed into a blast furnace, and the burden comprises 40-65% of agglomerate, 30-50% of pellet and 5-10% of lump ore; the diacidic basicities CaO/SiO2 of agglomerate, pellet and blast-furnace slag are respectively controlled at 1.6-2.5, 0.6-1.0 and 1.05-1.20; the content of MgO in blast-furnace slag is controlled at 7.5-9.0%; by adding two batches of ore and three batches of coke and using the charging operation of the development center, manganese oxide ore or sintered manganese ore powder, and fluorite are incorporated into injection coal and injected into the blast furnace along with the coal powder; and thus, the content of MnO in the slag and the content of CaF2 in the slag are respectively controlled at 1.0-4.5% and 0.50-2.0%, and the oxygen-enrichment percentage of the blast furnace is controlled at 2.0-4.0%. Compared with the smelting blast furnace using the same quality and structure of the burden, the comprehensive coke ratio of the invention is reduced by 20-50kg per ton of iron, the content of TFe in the slag is reduced by 50%, and the comprehensive cost per ton of iron is reduced by 30-50 yuan. The invention has wide prospects for popularization and application.
Owner:CENT SOUTH UNIV

Nitrogen-doped carbon-clad manganese oxide lithium ion battery composite cathode material, and preparation method and application of composite cathode material

The invention discloses a nitrogen-doped carbon-clad manganese oxide lithium ion battery composite cathode material, and a preparation method and an application of the composite cathode material. The composite material is composited by nanoscale manganese oxide and dopamine, wherein manganese oxide is spherical. The method comprises the steps of mixing a prepared spherical manganese oxide nano particle and dopamine hydrochloride, performing filtering, washing and drying to obtain a manganese oxide and polydopamine composite, and then converting a polymerization layer into a nitrogen-doped carbon layer by high-temperature carbonization. The prepared nitrogen-doped carbon-clad manganese oxide (MnO@NC) lithium ion battery composite cathode material is stable in structure and good in conductivity, and has excellent rate capability and cycling stability as a lithium ion battery cathode material; and polymerization of the dopamine is only completed at a room temperature and under a slightly alkaline condition, so that the composite cathode material is low in cost, low in energy consumption, convenient to control and environment-friendly, is suitable for a practical application of a lithium ion battery, and can realize industrial mass production.
Owner:SOUTH CHINA UNIV OF TECH

Preparation method of high density nickel cobalt lithium manganate positive electrode material

The invention discloses a preparation method of a high density nickel cobalt lithium manganate positive electrode material, LiNixCoyMnzO2. The preparation method comprises the following steps: firstly, mixing a nickel salt solution, a cobalt salt solution and a manganese salt solution according to a certain mol ratio, adding the mixed solution, a complexing agent solution and a precipitant solution together to a stirring reaction kettle with a base solution, fully reacting, carrying out solid-liquid separation, and washing and drying to obtain a globular nickel cobalt manganese oxyhydroxide precursor; calcining the precursor at the temperature of 350-900 DEG C for 2-20 hours to obtain a globular nickel cobalt manganese oxide precursor, and smashing the globular nickel cobalt manganese oxide precursor at high speed to obtain a mono-crystalline nickel cobalt manganese oxide precursor; mixing a lithium source and the mono-crystalline precursor according to a certain mol ratio, calcining at the temperature of 700-980 DEG C for 2-20 hours, and smashing and classing to obtain the mono-crystalline nickel cobalt lithium manganate positive electrode material. The preparation method provided by the invention has the advantages that the compacted density of the prepared nickel cobalt lithium manganate material is large, the specific capacity is high, the rate property and consistency are good, the preparation method is simple, and the preparation process is easy to control and operate.
Owner:HUNAN SOUNDDON NEW ENERGY

Heavy metal composite passivating agent used for paddy soil and preparation method thereof

The invention discloses a heavy metal composite passivating agent used for paddy soil and a preparation method thereof. The heavy metal composite passivating agent is prepared from three raw materials, namely meerschaum mineral powder, iron and manganese oxides and quicklime, in proportion by the following steps of: A, preparing the meerschaum mineral powder; B preparing the iron and manganese oxides; and C, uniformly mixing the raw materials prepared in the steps A and B with the quicklime to obtain the composite passivating agent. The heavy metal composite passivating agent has a reasonable formula, the method is easy and simple to operate; and the heavy metal composite passivating agent can reduce 70.5 to 95.0 percent of the content of the effective components of meerschaum with heavy metal activity, the iron and manganese oxides (Fe2O3+MnO2), calcium oxide (CaO) and the like in the soil, and also has multiple functions of passivating soil heavy metals, restoring acidified soil and the like, can reduce the contents of active cadmium and lead in the soil of a polluted paddy field by 39.7 to 53.8 percent and 49.9 to 59.1 percent respectively, lower the contents of the cadmium and the lead in agriculture products by 35.1 to 46.9 percent and 35.3 to 53.1 percent respectively, and simultaneously improve the pH value of the soil by 0.22 and 0.43. The heavy metal composite passivating agent is mainly used for paddy production of extensive heavy metal pollution zones, and can also be used for the productions of corns, vegetables and the like planted in paddy fields.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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