2525 results about "Manganese oxide" patented technology

A catalyst system and a method for reducing nitrogen oxides in an exhaust gas by reduction with a hydrocarbon or oxygen-containing organic compound reducing agent are provided. The catalyst system contains a silver catalyst and a modifier catalyst, where the modifier catalyst contains a modifier oxide, where the modifier oxide is selected from the group consisting of iron oxide, cerium oxide, copper oxide, manganese oxide, chromium oxide, a lanthanide oxide, an actinide oxide, molybdenum oxide, tin oxide, indium oxide, rhenium oxide, tantalum oxide, osmium oxide, barium oxide, calcium oxide, strontium oxide, potassium oxide, vanadium oxide, nickel oxide, tungsten oxide, and mixtures thereof. The modifier oxide is supported on an inorganic oxide support or supports, where at least one of the inorganic oxide supports is an acidic support. The catalyst system of the silver catalyst and the modifier catalyst provides higher NO_x conversion than either the silver catalyst or the modifier catalyst alone.

A resistive sense memory cell includes a layer of crystalline praseodymium calcium manganese oxide and a layer of amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack. A first and second electrode are separated by the resistive sense memory stack. The resistive sense memory cell can further include an oxygen diffusion barrier layer separating the layer of crystalline praseodymium calcium manganese oxide from the layer of amorphous praseodymium calcium manganese oxide a layer. Methods include depositing an amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack.

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.

A contact plug structure formed on a contact hole of an insulating layer of a semiconductor device includes a metal silicide layer formed on a bottom part of the contact hole of the insulating layer, a manganese oxide layer formed on the metal silicide layer in the contact hole, and a buried copper formed on the manganese oxide layer which substantially fills the contact hole.

The invention relates to a manganese-based composite oxide catalyst for catalytically decomposing ozone, and a preparation method of the catalyst. The catalyst comprises manganese oxide and at least one transition metal oxide. The preparation method is a homogeneous precipitation method or a hydrothermal synthesis method. The manganese-based composite oxide catalyst adopts innocuous and non-poisonous materials, prepares a manganese-based composite oxide catalyst with high catalytic activity, good wet resistance and high catalytic deposition content by the simple and easy method, so that the catalyst is suitable for catalytically decomposing ozone produced in water or air treatment and modern industry and home appliance.

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.

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.

Electrode active materials comprising two or more groups of particles having differing chemical compositions, wherein each group of particles comprises a material selected from:

(a) materials of the formula A¹_aM¹_b(XY₄)_cZ_d; and

(b) materials of the formula A²_eM²_fO_g; and

wherein

(i) A¹, A², and A³ are Li, Na, or K;

(ii) M¹ and M³ comprise a transition metal;

(iv) XY₄ a phosphate or similar moiety; and

(v) Z is OH, or halogen.

In a preferred embodiment, A²_eM³_fO_g is A³_hMn_iO₄ having an inner and an outer region, wherein the inner region comprises a cubic spinel manganese oxide, and the outer region comprises a manganese oxide enriched in Mn⁺⁴ relative to the inner region. In a preferred embodiment, the compositions also comprise a basic compound.

The invention relates to a preparation method of metal mono-atoms and belongs to the technical field of materials science and engineering. The metal mono-atoms prepared through the method may include: Pt, Ag, Au, Pd, Rh, Ir, Ru, Co, Ni and Cu, and metal mono-atoms supported on TiO2, zinc oxide, cerium oxide, aluminum oxide, silicon oxide, ferric oxide, manganese oxide, C3N4, mesoporous carbon, ultrathin carbon films, graphene, carbon nano tubes or molecular sieve materials, etc. The method includes the steps of: preparing a precursor solution in a certain concentration, and freezing the solution; and under an ice phase, processing ice cubes by means of external field or reaction between reactants in the ice cubes, and when the ice cubes are molten, a mono-atom solution is finally produced; mixing the mono-atom solution with different materials, performing ultrasonic treatment, filtration, cleaning and drying to finally obtain the mono-atoms supported on various materials. The preparation method is quick, has high product density, allows mass production, is high in efficiency and has wide application range, and compared with a co-precipitation method and an impregnation method, the method has significant advantages.

The invention relates to a high-strength compress supporting agent for coarse oil and a preparation method thereof. The high-strength compress supporting agent for the coarse oil is prepared from the following raw materials by mass portion: 60 to 85 portions of ceramic roller waste, 1 to 20 portions of red mud, 0 to 20 portions of fly ash, 0 to 5 portions of manganese oxide or barium carbonate, 0 to 3 portions of dolomite and 5 to 10 portions of ceramic clay. The ceramic roller waste refers to corner waste or/and damaged and broken ceramic roller waste in the processing process of ceramic roller manufactures, and Al2O3 content of chemical compositions of the ceramic roller waste is not less than 68 percent. The high-strength compress supporting agent for the coarse oil prepared from the ceramic roller waste with high alumina content has the characteristics of high strength and acid resistance, and is used for oil fracturing in medium-deep wells; and the preparation method is simple and feasible, and is suitable for batch production.

A bilayer seed layer structure is employed between a first read gap layer and a spin valve sensor for increasing the magnetoresistive coefficient (dr/R). In a bottom spin valve sensor the bilayer seed layer structure is located between the first read gap layer and a pinning layer and in a top spin valve sensor the bilayer seed layer structure is located between the first read gap layer and the free layer. The pinning layer is preferably iridium manganese (IrMn). The bilayer seed layer structure includes a first seed layer which is a metallic oxide and a second seed layer that is a nonmagnetic metal. A preferred embodiment is a first seed layer of nickel manganese oxide (NiMnO) and a second seed layer of copper (Cu).

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.

The invention supplies a new type adsorbent--mixed oxide of iron and manganese / diatomite preparation, use and regeneration method, belongs to the treatment of technology. The method used the soluble ferrous permanganate and salt as raw materials, respectively prepared the solutions, after adequate lye into permanganate solution, mixed two salt solutions, by adding diatomite particles, full oscillation, standing aging, neutralize, washing and drying to get the manganese oxide / silicon algae absorbent. The adsorbent is larger than the surface area and good adsorption properties can be used to remove arsenic in water pollutants (especially tervalence arsenic), and the adsorption surface activity of the saturated absorption of pollutants can be directly passed to load manganese oxide compound to regeneration.

Improved glass compositions for glass fibers typically useful for fire resistant blankets or containers to provide high burn-through resistance at temperatures of 2,300° F. and typically comprising 10.23% to 81.81% silica, 2.0% to 26.00% alumina, 3.0% to 15.0% calcium oxide, 0% to 10.50% magnesium oxide, 1.0% to 18.0% ferrous+ferric oxide, and 0% to 4.0% titanium dioxide; the improved glass compositions may include 0% to 9% lithium oxide, 0% to 9% boron oxide, 0% to 6.0% manganese oxide, and 0% to 4.0% phosphorous oxide.

A coating admixture, method of coating and substrates coated thereby, wherein the coating contains colloidal silica, colloidal alumina, or combinations thereof; a filler such as silicon dioxide, aluminum oxide, titanium dioxide, magnesium oxide, calcium oxide and boron oxide; and one or more emissivity agents such as silicon hexaboride, carbon tetraboride, silicon tetraboride, silicon carbide, molybdenum disilicide, tungsten disilicide, zirconium diboride, cupric chromite, or metallic oxides such as iron oxides, magnesium oxides, manganese oxides, chromium oxides, copper chromium oxides, cerium oxides, terbium oxides, and derivatives thereof. In a coating solution, an admixture of the coating contains water. A stabilizer such as bentonite, kaolin, magnesium alumina silicon clay, tabular alumina and stabilized zirconium oxide is also added.

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.

Using a positive electrode active material including spinel type manganese oxide as the main constituent, a novel low cost and high output power flat type nonaqueous secondary cell for HEVs that has increased safety at overcharge, and superior storage properties and cycle life is provided. A flat type nonaqueous secondary cell that has increased safety and is superior in storage and cycle properties even though the cell is a laminate type cell which does not have a blocking mechanism can be obtained by blending the spinel type lithium manganese oxide of the positive electrode and 5 wt % to 40 wt % of layered type lithium manganese oxide, to suppress storage deterioration at a high temperature and to simultaneously achieve safety when overcharged, and further, by adding a Li compound having a structure as shown in Formula (1) structure, to suppress deterioration of a mixed positive electrode active material during a high temperature cycle.

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.

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.

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.

The invention discloses a preparation method of a flexible super capacitor based on carbon cloth. The preparation method comprises the following steps of: firstly, growing carbon nanometer particles, carbon nanometer tubes, zinc oxides or tungsten oxide on the carbon cloth, or generating molybdenum dioxide on the carbon cloth; then, preparing manganese oxide or conductive polymers on the substances grown or generated on the carbon cloth for forming electrode materials; and finally, overlapping two electrode materials through solid electrolytes, separating the two electrode materials through a diaphragm and preparing the solid super capacitor. The flexible super capacitor prepared by the method provided by the invention has good electrochemical characteristics and the bending performance and has good application prospects in energy storage aspects.

When a barrier film is formed on an exposed surface of an interlayer insulation film on a substrate, the interlayer insulation film having a recess formed therein, and a metal wiring to be electrically connected to a metal wiring in a lower layer is formed in the recess, a barrier film having an excellent step coverage can be formed and increase of a wiring resistance can be restrained. An oxide film on a surface of the lower copper wiring exposed to a bottom surface of the interlayer insulation film is reduced or edged so as to remove oxygen on the surface of the copper wiring. Then, by supplying an organic metal compound containing manganese and containing no oxygen, generation of manganese oxide as a self-forming barrier film is selectively allowed on an area containing oxygen, such as a sidewall of the recess and a surface of the interlayer insulation film, while generation of the manganese oxide is not allowed on the surface of the copper wiring. Thereafter, copper is embedded in the recess.

The invention discloses a transforming solution for preparing anti-corrosion compound oxidation film on an aluminum alloy surface and a using method for the oxidation film. The invention is characterized in that, the transforming solution is a film-forming promoter containing rare-earth salt (nitrate or sulfate and compound salt of cerium, praseodymium, and neodymium), such compound oxidant as radical of permanganate, nitrate and perchlorate, etc., film-forming promoter of vanadium salt and strontium salt, etc.; the transforming solution contains no sexavalent chromium, is environmental friendly; the reaction speed is improved by the compound oxidant and the film-forming promoter, no heating is needed for the chemical transforming, the treating time is 1-5 min. The invention can rapidly prepare under room temperature compound oxidation film comprising compound rare-earth oxide, alumina and manganese oxide with good resistance to corrosion on aluminum alloy surface. The treating solution from the invention is of rapid film-forming speed, simple process, even film layer, high resistance to corrosion, and low environmental pollution, etc.

The invention relates to negative-ion, far-infrared, antibacterial and anti-mite compound polyester fibers and a manufacturing method thereof. The compound polyester fibers are added with a negative-ion additive, a far-infrared additive and an antibacterial and anti-mite additive, wherein the negative-ion additive, the far-infrared additive and the antibacterial and anti-mite additive respectively account for 2%, 5% and 6% by mass in the compound polyester fibers; the negative-ion additive comprises an additive carrier and tourmaline negative-ion powder; the far-infrared additive comprises an additive carrier, Tai Chi stone powder, ZrO2 nano-powder, nano-silicon dioxide, nano-aluminum oxide, nano-manganese oxide and nano-calcium oxide; the antibacterial and anti-mite additive comprises an additive carrier, nano-Cu-ZnO compound particles, nano-titanium dioxide, nano-zinc oxide and nano-silicon dioxide; and the additive carrier is TiO2 hollow spheres.

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.

The invention discloses a nano-compound adsorbent for efficiently removing trace phosphorus, arsenic and antimony from a water body, belonging to the technical field of environment functional materials. The organic framework of the nano-compound adsorbent of the invention is hypercrosslinked styrene-divinylbenzene ion exchange resin, a functional group for surface binding of the organic framework is a quaternary ammonium group or pyridyl, nano-inorganic functional particles are loaded, and the total volume of 1-20nm nano-pores accounts for greater than or equal to 90% of the total volume of all the pores of the organic framework. The nano-inorganic functional particles are nano-hydrated ferric oxide or nano-hydrated manganese oxide. The nano-compound adsorbent of the invention has more obvious nano effect, strong reaction activity, great adsorption capacity and high selectivity, well solves the defects of obvious swelling, weak adsorption reaction activity, small adsorption capacity, lower adsorption selectivity and the like of the existing nano-compound adsorbent, and is more suitable for advanced treatment of micro-pollution of water and waste water.

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.

The invention belongs to the material field for removing the arsenic in water by settlement, more particularly relates to polyelement composite metal oxide arsenic removal settlement agent and an application method thereof based on iron oxide, manganese oxide, and aluminum oxide. The invention uses an ectopic preparation method or situ preparation method for preparing and obtaining polyelement composite metal oxide arsenic removal settlement agent which comprises hydrated iron oxide, hydroxyl-hydrated ferric hydroxide, hydrated aluminum oxide, hydroxyl-hydrated alumina, hydrated manganese oxide and the like. The polyelement composite metal oxide arsenic removal settlement agent can be used for removing the arsenic pollutants in water bodies such as lakes, reservoirs, rivers, groundwater, drinking water, industrial waste water, and the like; in addition, the settlement agent can also be used for removing the heavy metals such as copper, chromium, cadmium, lead, and the like, and the pollutants such as iron, manganese, phosphates, and the like in water by settlement.

The invention provides a sodium ion secondary battery, and a layered manganese-containing oxide active substance and an anode active substance used in the sodium ion secondary battery; the chemical general formula of the anode active substance is Na[x]A[y]Mn[1-y]O[2], wherein A is one or more selected from a group including Li, Mg, Cu, Zn, Al, V and Fe; x is more than 0.4 and less than 0.9, y is more than 0.05 and less than 0.5, delta is more than minus 0.1 and less than 0.1. Average working voltage of the anode active substance of the sodium ion secondary battery disclosed by the invention in the sodium ion secondary battery is 2.6-3.8V; furthermore, a novel anode material of layered doped manganese oxide disclosed by the invention is good in safety performance, low in cost and good in cycling stability.

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.