119results about "Sodium/potassium compounds" patented technology

The invention relates to nanomaterials and assemblies including, a micrometer-scale spherical aggregate comprising: a plurality of one-dimensional nanostructures comprising titanium and oxygen, wherein the one-dimensional nanostructures radiate from a hollow central core thereby forming a spherical aggregate.

The present invention relates to lithium secondary batteries comprising a negative electrode, a positive electrode, a separator and a lithium-based electrolyte carried in an aprotic solvent, and to the electrolyte compositions, and to methods for purifying battery active materials. The electrolyte comprises at least one solvent and a lithium salt of the formula:

Li₂B₁₂F_xH_12-x-yZ_y

where x+y is from 3 to 12, and x and y are independently from 0 to 12, and Z comprises at least one of Cl and Br.

The invention discloses a rapid synthesis method of a drinking water treatment agent (i.e. potassium ferrate). The method directly utilizes the industrial pure ferric hydroxide Fe(OH)3, the self-prepared potassium hypochlorite (KClO) saturated solution and the deionized water as raw materials for preparing potassium ferrate. The process comprises the following steps: preparing the potassium ferrate by the potassium hypochlorite (KClO) saturated solution and the industrial pure ferric hydroxide Fe(OH)3, adding the CuCl22H2O stabilizer for solid liquid separation, adding the KOH for recrystallization and purification, and washing and removing impurity by the normal pentane and the inorganic ethanol; and performing vacuum drying and sealing. The method has the advantages of simple process, good quality of the products and low production cost.

Provided is a process for producing prelithiated particles of an anode active material for a lithium battery. The process comprises: (a) providing a lithiating chamber having at least one inlet and at least one outlet; (b) feeding a plurality of particles of an anode active material, lithium metal particles, and an electrolyte solution (containing a lithium salt dissolved in a liquid solvent) into the lithiating chamber through at least one inlet, concurrently or sequentially, to form a reacting mixture; (c) moving this reacting mixture toward the outlet at a rate sufficient for inserting a desired amount of lithium into the anode active material particles to form a slurry of prelithiated particles dispersed in the electrolyte solution; and (d) discharging the slurry out of the lithiating chamber through the at least one outlet.

The invention discloses a preparation method of alkali metal salt of bis(fluorosulfonyl)amide. The preparation method comprises the step of carrying out fluoridation on alkali metal salt of bis(chlorosulfonyl)amide in an polar aprotic solvent by taking ion liquid as a phase transfer catalyst and alkali metal fluoride as a fluorinating agent, so as to obtain corresponding alkali metal salt of bis(fluorosulfonyl)amide. Compared with the prior art, the preparation method has the advantages that reaction conditions are mild, the yield and the purity are high, the product is easily separated and purified, the ion liquid catalyst can be recycled and reduced, and the like. The preparation method is applicable to industrial mass production.

A sodium ion battery comprises a cathode having a porous redox active metal-organic framework material. The battery can be an organic electrolyte sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an organic solvent or mixture of organic solvents. Alternatively, the battery can comprise an aqueous sodium ion battery wherein the electrolyte comprises a sodium salt dissolved in an aqueous solvent. Battery performance is especially related to electrolyte and binder selection.

A mixture of sulphamic acid, a halogenated sulphonic acid and thionyl chloride is heated to allow the reaction to proceed, to thereby produce first intermediate products. The first intermediate products are then subjected to reaction with an alkali metal fluoride MF to produce second intermediate products. The second intermediate products is then subjected to reaction with the alkali metal fluoride MF in a polar solvent to obtain a desired product MN(SO₂F)₂ (where M is an alkali metal).

The present invention discloses the preparation process of potassium monopersulfate composite salt. The preparation process includes the following steps: the oxidation reaction between hydrogen peroxide and fuming sulfuric acid; the neutralization between the potassium hydroxide aqua and the product of the preceding step to obtain the water solution of the destination product potassium monopersulfate; concentration; adding stabilizer, cooling to crystallize, collecting solid potassium monopersulfate, and drying to obtain the product. The reaction may be performed in a conventional reactor, and the process of the present invention has simple operation, no need of special equipment and high product stability, and is suitable for industrial production.

A composition is provided as a salt having the formula MBF₃X where M is an alkali metal cation and X is the halide fluoride, bromide or iodide. A lithium salt has several characteristics making the composition well suited for inclusion within a lithium-ion battery. A process for forming an alkali metal trifluorohaloborate salt includes the preparation of a boron trifluoride etherate in an organic solvent. An alkali metal halide salt where the halide is chloride, bromide or iodide is suspended in the solution and reacted with boron trifluoride etherate to form an alkali metal trifluorohaloborate. The alkali metal trifluorohaloborate so produced is collected as a solid from the solution. The process is simple and yields alkali metal trifluorohaloborate of sufficient purity to be used directly in battery applications.

The invention provides a sodium ion battery positive electrode material, a preparation method thereof and a sodium ion battery. The chemical formula of the sodium ion battery positive electrode material is NaxNiyM<1-y>O2, x is greater than 0.5 and less than 1, y is greater than 0.1 and less than 0.5, and M is selected from at least one of Mn, Fe, Co, V, Cu, Cr and Ti. The sodium ion battery positive electrode material is spherical-like particles, and has a layered structure. The sodium ion battery positive electrode material has good charge-discharge specific capacity and cycle performance. According to the preparation method, the precursor mixed solution is controlled to react under the conditions of high temperature and high pressure, so that the interlayer oxygen content of the layeredstructure of the positive electrode material of the sodium-ion battery is effectively reduced, and the cycle performance of the material is obviously improved. The preparation process is simple in steps, easily available in raw materials, easy to implement and suitable for large-scale production and application.

The invention discloses a fabricating method for solid potassium ferrate, which comprises a potassium hypochlorite fabrication procedure, a potassium ferrate synthesizing procedure and a sublimating procedure; the potassium ferrate synthesizing procedure is that a ferric nitrate nonahydrate covering from 4 percent to 10 percent of a total solution weight is added into the newly fabricated saturate potassium hypochlorite under a temperature from 20-25 DEG C and mixed, a solid potassium hydroxide is added slowly to a saturate degree and mixed, and is cooled down to 0 DEG C, and is filtered to get a filter cake which is washed by the potassium hydroxide solution to completely remove purple color, and the washing filtrate is combined and cooled to 0 DEG C, the solid potassium hydroxide is slowly added with mixing process until reaching to a saturate status, after a plurality of violet black solids are separated out, which are filtered by a funnel on a temperature from 0-5 DEG C, the filter cake is washed sequentially by cyclohexane and aether, and is dried by a temperature from 60-70 DEG C; compared with the prior art, the invention optimizes the fabrication process and procedure, the yield is over 85 percent according to the ratio between the actual output and the theoretical output, which can reach to 97 percent maximally.

A method for preparing nano pipe sodium titanate/metatitanic acid, comprising the following steps: (1) mixing the compound containing titanium with the strong alkaline solution with the wight proportion being 20-80%; (2) heating and backflowing in the microwave oven for 10 minitues-20 hours; (3) cooling and depositing the reacted mixing liquid, washing the deposite to make the pH be 6-8, separating and getting the nano pipe sodium titanate, immersing the product got in the above reaction in strong acid for 3-72 hours, washing, drying and getting the nano pipe metatitanic acid. The invention is characterized by the temperated reacting condition, fast reaction velocity, high performance and cost ratio of the product and being suited to produced industrially.

Na-rich electrolyte compositions provided herein can be used in a variety of devices, such as sodium ionic batteries, capacitors and other electrochemical devices. Na-rich electrolyte compositions provided herein can have a chemical formula of Na₃OX, Na₃SX, Na _(3-δ) M_δ/2OX and Na _(3-δ) M_δ/2SX wherein 0<δ<0.8, wherein X is a monovalent anion selected from fluoride, chloride, bromide, iodide, H⁻, CN⁻, BF₄⁻, BH₄⁻, ClO₄⁻, CH₃⁻, NO₂⁻, NH₂⁻ and mixtures thereof, and wherein M is a divalent metal selected from the group consisting of magnesium, calcium, barium, strontium and mixtures thereof. Na-rich electrolyte compositions provided herein can have a chemical formula of Na _(3-δ) M_δ/3OX and/or Na _(3-δ) M_δ/3SX; wherein 0<δ<0.5, wherein M is a trivalent cation M³, and wherein X is selected from fluoride, chloride, bromide, iodide, H⁻, CN⁻, BF₄⁻, BH₄⁻, ClO₄⁻, CH₃⁻, NO₂⁻, NH²⁻ and mixtures thereof. Synthesis and processing methods of NaRAP compositions for battery, capacitor, and other electrochemical applications are also provided.

A process for simultaneously preparing potassium ferrate and barium ferrate used for battery or water-treating material includes such steps as adding potassium iodide to KOH solution, filling Cl gas, adding KOH solid until dissolving, cooling, filtering, collecting the filtrate containing potassium hypochlorite, adding at least one of iron nitrate, iron sulfate and iron chloride, adding it to cooled KOH solution at O deg.C, filtering to obtain coarse potassium ferrate, dissolving it in KOH solution, filter, recrystallizing in KOH solution, filtering, baking the filtered dregs to obtain potassium ferrate, deluting the filtrate, cooling, mixing it with barium chloride (or acetate) in KOH solution, filtering, washing the dregs and baking to obtain barium ferrate.

Production of monoper-potassium bisulfate includes oxidation reacting for hydrogen peroxide sulfuric acid to obtain reaction product, reacting the product with potassium hydrate to obtain monoper-potassium bisulfate solution, cooling, crystallizing, collecting solid monoper-potassium bisulfate, drying and obtaining end product. It is simple and convenient for industrial production.

The invention relates to a method for preparing sylvite from plant ash, which is characterized in that the plant ash is put into a vessel, water with the weight which is more than twice of the weight of the plant ash is added into the vessel for carrying out fully stirring for 10 minutes to 20 minutes, potassium hydroxide with the weight which is 0.2 percent to 5 percent of the total weight of the plant ash and the water is added for carrying out fully stirring for 10 minutes to 20 minutes, the PH value of the plant ash solution is adjusted to 10 to 14 for sedimentation to remove other impurities, and colorless, transparent and pure solution is obtained after fine filtration; the solution filtered is put into a reaction kettle, 2 percent to 5 percent of selected acid in which the content of the plant ash and the water is 10 percent to 50 percent of the total weight is added according to preparation requirements and the measure value of the potassium ion in the plant ash for carrying out fully stirring for 10 minutes to 20 minutes, and the PH value is adjusted to 4 to 5; heating is carried out for vaporizing the water in the solution, a centrifuge is used for dehydration till the water content is less than 5 percent, and then product obtained is crashed into 50-mesh to 200-mesh fine powder and the sylvite is obtained. The plant ash used as the raw material in the invention is economic and environment-friendly, thereby having great benefit and grand development prospect.

A method of forming a powder M_jX_p wherein M_j is a positive ion or several positive ions selected from alkali metal, alkaline earth metal or transition metal; and X_p is a monoatomic or a polyatomic anion selected from Groups IIIA, IVA, VA, VIA or VIIA; called complexometric precursor formulation or CPF. The method includes the steps of:

providing a first reactor vessel with a first gas diffuser and an first agitator;

providing a second reactor vessel with a second gas diffuser and a second agitator;

charging the first reactor vessel with a first solution comprising a first salt of M_j;

introducing gas into the first solution through the first gas diffuser,

charging the second reactor vessel with a second solution comprising a salt of M_p;

adding the second solution to the first solution to form a complexcelle;

drying the complexcelle, to obtain a dry powder; and

calcining the dried powder of said M_jX_p.

The preparation process of solid potassium ferrate includes the following steps: introducing chlorine into purified waste alkali solution to prepare hypochlorite solution; adding ferric nitrate into the solution to prepare potassium ferrate solution; adding solid potassium hydroxide, dissolving and filtering to obtain coarse potassium ferrate product; washing coarse potassium ferrate product with potassium hydroxide solution; filtering to obtain re-crystallized potassium ferrate product; washing with organic solvent and vacuum drying to obtain stable solid potassium ferrate product; collecting all the filtrate and treating for reuse. The present invention has the circulated utilization of waste alkali solution, low cost and less environmental pollution.