111results about How to "Increase oxidation potential" patented technology

The invention specifically relates to a high-voltage lithium ion battery electrolyte, which belongs to the technical field of lithium ion battery electrolytes. The high-voltage lithium ion battery electrolyte provided by the invention comprises a non-aqueous solvent, a lithium salt and an additive, wherein the additive comprises a mixture of a fluoro-ether additive and an alkyl dinitrile additive. A lithium ion battery using the high-voltage lithium ion battery electrolyte has stable cycle performance at normal temperature, no gas generation at a high temperature condition and small changes of internal resistance. A preparation process for the high-voltage lithium ion battery electrolyte is simple and easy to implement and has good market prospects.

The invention belongs to the technical field of lithium-ion battery electrolytes, and particularly relates to a high-voltage lithium-ion battery electrolyte. The high-voltage lithium-ion battery electrolyte comprises non-aqueous solvents, lithium salt and additives, wherein the additives comprise the mixture of fluoro phosphonitrile, fluoro-ether and unsaturated olefinic sultone. A lithium-ion battery using the high-voltage lithium-ion battery electrolyte is long in cycle life under the high voltage and small in internal resistance change. The high-voltage lithium-ion battery electrolyte is simple in preparing technique, easy to realize, and broad in market prospect.

The invention discloses a nano titanium dioxide (TiO2)/montmorillonite composite photocatalysis water treatment material and a preparation method thereof. The material consists of the following raw materials by weight percent: 40 to 98 percent of nano TiO2 and 2 to 60 percent of montmorillonite, wherein the nano TiO2 is loaded on the montmorillonite. The preparation method comprises the following steps of measuring the nano TiO2 and the montmorillonite, uniformly mixing the nano TiO2 and the montmorillonite, and placing the mixture into absolute ethyl alcohol to obtain pulp; dispersing the pulp through ultrasonic, then placing the pulp into a ball milling machine to be mechanically ball milled to obtain a mixture; completely drying the mixture at a constant temperature; carrying out the heat treatment again on the mixture, then cooling the mixture to the room temperature, and taking out the mixture to be uniformly ground to obtain the water treatment material. The nano TiO2 is fixedly loaded on the natural mineral montmorillonite through a simple and environment-friendly solid phase dispersion method, so that the composite material has the characteristics of easy dispersion and convenience in recycling when the composite material is used in a liquid phase, the photocatalysis degrading capacity of the composite material in the range between the ultraviolet and the visible light can be improved, and the original characteristic of the montmorillonite for purifying the water also can be realized.

The invention provides ion liquid composed of fluoroalkyl sulfimide salt alkali metal salt containing 'S-fluoroalkyl sulfimide group', fluoroalkyl sulfimide negative ions containing 'S-fluoroalkyl sulfimide group' and positive ions of sulfonium salt, ammonium salt and microcosmic salt. The ion liquid utilizes (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine with sulfur valence state as +4 and hydroxylamine oxygen sulfonic acid to react to prepare intermediate fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide, effectively shortens the line that the (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine is utilized to prepare fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide through the three steps of chlorination, fluorination and amination, and is convenient to operate and high in yield and purity. The alkali metal salt has good heat stability and hydrolysis resistance, has high conductivity and oxidation potential in traditional carbonic ester solution, and is good in compatibility with electrode materials widely used. The ion liquid can be applied to lithium ion batteries and carbon-based super capacitors.

The invention relates to an additive and a solvent of a lithium secondary battery electrolyte, belonging to the field of lithium battery materials. The structural formula of the additive is shown as the specification, wherein R represents an alkyl group of which the carbon atom number is 1-20 or an alkyl group of which the carbon atom number is 1-20 and hydrogen is replaced by halogen atoms; R' is one selected from the alkyl group of which the carbon atom number is 1-20, the alkyl group of which the carbon atom number is 1-20 and the hydrogen is replaced by the halogen atoms, an alcoxyl ethylof which the carbon atom number is 1-20, an alcoxyl ethyl of which the carbon atom number is 1-20 and hydrogen is replaced by halogen atoms, an aryl group of which the carbon atom number is 6-30 or an aryl group of which the carbon atom number is 6-30 and hydrogen is replaced by halogen atoms; the mass percent of the additive is 1-50%; and preferably the solvent is a solvent which contains isocyanate compounds with the mass percent of 1-50%. The electrolyte containing the additive and the solvent is high in conductivity at a low temperature, can form an SEI (solid electrolyte interface) film on the anode surface of the lithium secondary battery and is high in safety and oxygenolysis potential.

The invention discloses an electrolyte for a lithium ion battery. The electrolyte comprises an organic solvent, lithium salt and an additive, wherein the usage amount of the additive accounts for 0.1%-3% of the total weight of the electrolyte; the concentration of the lithium salt in the electrolyte is 0.1-1.8 mol/L; the organic solvent comprises a carbonate solvent and a fluoro silane solvent; the structural formula of fluoro silane is as shown in the specification, R1, R2 and R3 are same or different C1-C6 linear alkyl. The electrolyte disclosed by the invention can be used under the condition of high voltage more than 4.5 V, thereby solving the problem that the lithium ion battery is reduced in the cycle property, storage property and safety property because the lithium ion battery is easy to decompose under the conditions of high voltage charging and discharging. Experiments prove that the electrolyte disclosed by the invention is difficult to decompose at high voltage and can achieve the capacity conservation rate more than 95% after being cycled for 100 times, thereby greatly enhancing the cycle property and magnification property of the lithium ion battery under the condition of high voltage.

The invention relates to an electro-polymerizable chemically-modified electrode organic material and application of the electrode organic material in ultra-trace TNT (Trinitrotoluene) detection and belongs to the field of electrochemical sensing technologies. The structural formula of the organic material is shown in the specification, wherein the molecular main chain skeleton consists of an A and two side units B. The A can be pyrene, naphthalene, anthracene, an anthracene derivative, phenanthrene, dibenzo-quinoxaline or the like; each B can be benzene, biphenyl, phenylene vinylene, fluorene or the like; each unit C is an electro-active unit and can be furan, pyrrole, thiophene, carbazole, diphenylamine, triphenylamine or the like. A connecting chain R for the molecular main chain skeleton and electrochemically-polymerized groups can be an alkyl chain, alkoxy chain or oxy chain. Carbazolyl groups can be subjected to crosslinking during electrochemical polymerization, and molecules can form spherical micro-nano structures due to crosslinking, so that on one hand, the contact specific surface area between the molecules of the organic material and TNT molecules is increased, on the other hand, due to pore structures formed among the micro-nano structures, TNT molecule diffusion paths are increased, and electrical signal response is enhanced.

The invention relates to an electrolyte additive and a high-voltage electrolyte containing the same, and belongs to the technical field of lithium-ion batteries. The electrolyte additive is an acrylic sulfuric anhydride derivative. 0.1%-10% of additive is added to a conventional electrolyte to prepare the high-voltage electrolyte; and the electrolyte has a high oxidation potential (over 4.5V), so that a high-voltage cathode material can be matched. Necessary conditions are provided for obtaining of the high-energy density lithium-ion battery; and addition of the additive is conducive to forming of a stable SEI film, so that the cycle performance of the battery can be prolonged. The electrolyte additive provided by the invention is reasonable in structure design and simple in preparation method; the obtained product is excellent in performance; and large-scale industrialized application is facilitated.

The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)₄]⁻) and a cationic metal complex functioning as redox-couple.

The invention belongs to the fluorescent sensing technical field and specifically relates to a high-efficiency organic fluorescent material and application of the material in TNT (trinitrotoluene) detection. The structural formula of the high-efficiency organic fluorescent material provided by the invention is Ar2-Ar1-Ar-Ar1-Ar2, wherein Ar1-Ar-Ar1 forms a light-emitting unit; the light-emitting center Ar can be spirofluorene, benzene, carbazole (alkyl chains different in length can be connected at No.9 site) or fluorene (alkyl chains different in length can be connected at No.9 site); Ar1 can be fluorene, biphenyl or difluorene; and electric-active unit Ar2 can be furan, pyrrole, thiophene, carbazole, diphenylamine or triphenylamine. An electro-polymeric thin film formed from the material through electrochemical polymerization is characterized in that intermolecular aggregation in the electrochemical polymerization process can be effectively reduced, the fluorescence efficiency of the electro-polymeric thin film is improved, and the electro-polymeric thin film is capable of effectively transferring charges with TNT molecules to quench fluorescent light, and therefore, effective detection on TNT is realized.

The invention belongs to the field of chemistry and chemical engineering, in particular to high voltage lithium ion battery functional electrolyte and a preparation method and application. The high voltage lithium ion battery functional electrolyte is obtained by adding a functional addictive with the mass equivalent to 0.1-5% of the mass of ordinary electrolyte into the ordinary electrolyte, the ordinary electrolyte is formed by cyclic carbonate solvent, linear carbonate solvent and conductive lithium salt. The functional addictive is dialkyl phenyl phosphonic acid salt, the structural formula of the ordinary electrolyte is shown as formula 1, wherein 0<=n<=5. The high voltage lithium ion battery functional electrolyte can remarkably improve circulating stability of a high voltage lithium ion battery under the condition of high temperature and high potential and can be widely applied to the field of lithium ion battery manufacture. (Please find the formula in the specification).

The circuit element has a first layer composed of an electrically insulating substrate material and a first electrically conductive material which is in the form of at least one discrete area such that it is embedded in the substrate material and/or is applied to the substrate material. Furthermore, it has a second layer having a second electrically conductive material, and a monomolecular layer composed of redox-active bispyridinium molecules, which is arranged between the first layer and the second layer. The bispyridinium molecules are immobilized on the electrically conductive material which is in the form of at least one discrete area, and make electrical contact with the second electrical material of the second layer. Furthermore, electrically inert molecules are immobilized on the first layer, which molecules form a matrix which surrounds the at least one discrete area with the monomolecular layer composed of bispyridinium molecules.

The invention relates to a dynamic micro-electrolysis waste water treatment device and a water treatment method thereof. The device comprises a cylinder reactor, a water inlet pipe, an air inlet pipe, a water outlet pipe, an air outlet pipe, a transmission belt, an aerated conduit and a support base, wherein the cylinder reactor is mounted on the support base; an output shaft of a driving motor is connected to the transmission belt and the cylinder reactor in turn so as to rotate the cylinder reactor; a sealing rotatable interface is arranged on two sides of the cylinder reactor and is respectively connected to the water inlet pipe, the air inlet pipe, the water outlet pipe and the air outlet pipe; and an exit of the water outlet pipe and the aerated conduit are both arranged in the cylinder reactor and are connected to the sealing rotatable interface. Compared with the prior art, the invention has higher treating efficiency and oxidizing capacity and is more convenient to charge, discharge, maintain and clean the cylinder.

The invention discloses a high-voltage electrolyte for a lithium ion battery and an application of the high-voltage electrolyte. The high-voltage electrolyte is prepared from the following components including a non-aqueous solvent, lithium salts, a first kind of additive and a second kind of additive, wherein the non-aqueous solvent is a carbonate solvent; the first kind of additive contains fluoro alkenyl ether, and a chemical formula of the first kind of additive is as follows: CHF2CF=CHOCFHCF3; the second kind of additive is one or a mixture of the following components of 1,3-lactone allylsulfonate, 1,4-lactone butene sulfonate and vinylene carbonate. Matched with a lithium nickel manganese oxide material, the lithium ion electrolyte provided by the invention is capable of meeting the requirement of recycling of the lithium ion battery under a high voltage condition, so that the cycling stability of a lithium nickel manganese oxide battery under the high voltage condition is excellent.

The invention relates to the field of lithium ion batteries, and discloses an additive used for a lithium ion battery electrolyte and the electrolyte and the lithium ion battery, wherein the additivecontains an additive a, an additive b and an additive c; the structural formula of the additive a is as shown in structural formula 1; the additive b is at least one of lithium difluorophosphate, lithium difluoroborate and lithium difluorosulfonimide; the additive c is at least one of vinylene carbonate, 1, 3-propane sultone, fluoroethylene carbonate, vinyl vinyl carbonate, glycol sulfite, vinylidene sulfate, propylene sulfite, dimethyl sulfate and trimethylene Sulfite. The additive is mixed by several mixtures, and is applied to the lithium ion battery electrolyte; the electrolyte has excellent overcharge performance, and is excellent in flame retardant property; furthermore, the lithium ion battery using the electrolyte has very small internal resistance and K value, and has relatively good normal temperature circulating performance and high temperature storage property.

An organic electrolyte for magnesium batteries including an ether solvent; a magnesium compound represented by Formula 1 dissolved in the ether solvent; and a Lewis acid:

A process for removing the pollutants from industrial sewage by efficient electrochemical oxidizing and decomposing method is disclosed. It features that the membrane electrode of diamond is used to degradate the organic pollutants. Its advantages are high and stable chemical performance, high electric potential and low cost.

The invention discloses a method for detecting phosphorus content in metallurgy raw materials. According to the method, bismuth nitrate, ascorbic acid and hydroxylamine hydrochloride are prepared into a mixed reducing agent through uniform sample weighing amounts; and ammonium molybdate, potassium sodium tartrate and ethanol are prepared into a mixed developing solution, and bismuth phosphorus molybdenum blue ternary heteropoly acid is generated. A phenomenon that the reducibility of ascorbic acid is strong so that other ion inferences are caused is avoided and the stability of the reducing agent is enhanced; the mixed reducing agent and the mixed developing solution can be added reversely; and the content can be determined by one calibration curve through quantitative dilution of a high-content analyzing section. By virtue of the method, the content of the phosphorus in the metallurgy raw materials can be accurately determined; and according to the method, the steps are simple in steps, the operation is convenient, and the analysis requirements on phosphorus in a production process can be met.

The invention discloses high-voltage electrolyte containing a novel additive. The high-voltage electrolyte is prepared from the following raw materials in percentage by mass: lithium salt, 85 to 95 percent of organic solvents, 2 to 8 percent of additives A and 5 to 8 percent of additives B. The high-voltage electrolyte containing the novel additive has the advantages that dibenzothiophene sulfonecontaining sulfur elements is used as a high-voltage additive of the lithium-ion electrolyte; the battery interface resistance is improved; the high-voltage performance of a lithium-ion battery is improved; the negative element material can be effectively coated by ethyl ester sulfate; the room temperature cycle performance under high voltage is greatly improved.

The invention discloses a method for recovering multiple valuable substances from waste diamond tool bit raw materials. The method can realize efficient economical and environmental-friendly recoveryof the multiple valuable substances in the waste diamond tool bit raw materials, and is particularly suitable for low-chromium raw materials with complex components. Iron, nickel, cobalt, zinc, chromium and other relatively easy-soluble metals are directly leached by dilute sulfuric acid at normal pressure, the leachate is crystallized to obtain a ferrous sulfate heptahydrate product, and productsof copper sulfide, zinc carbonate, cobalt carbonate and nickel sulfide are sequentially prepared from crystallization mother liquor, air is filled into a dilute sulfuric acid solution by adopting aninnovative nano cavitation device at normal pressure from residue leached for the first time, the dissolution speed of copper is obviously improved at lower temperature and sulfuric acid concentration, filtering and screening are performed to obtain products of diamond and tungsten carbide, the leachate is crystallized to obtain products of copper sulfate pentahydrate, and the valuable substancesare recovered step by step. The technological process is simple, the recovery rate of the valuable substances is high, the production cost is low, the automation degree is high, and industrial production can be realized.

The invention relates to a method for reducing viscosity of polyacrylamide with chlorine dioxide by an acid activator. The method for reducing the viscosity of polyacrylamide with chlorine dioxide by the acid activator comprises the steps that 100-600mg/L polyacrylamide waste water is placed in a brown reaction flask; a pH value of the waste water is adjusted to 4-12 with sulfuric acid or sodium hydroxide; a chlorine dioxide solution activated by hydrochloric acid or phosphoric acid is measured and placed in the reaction flask; a volume ratio of the polyacrylamide waste water to the activated chlorine dioxide solution ranges from 200:1 to 200:3; and the reaction flask is placed on a magnetic stirrer for reaction for 1-2h. The method is applicable to treatment on the 100-600mg/L polyacrylamide waste water; hydrochloric acid or phosphoric acid acts as the activator to activate chlorine dioxide; the reaction time is short; a viscosity reducing effect is good; and a viscosity reducing rate of polyacrylamide can reach above 79%.