57results about How to "High decomposition voltage" patented technology

A non-aqueous electrolyte including a lithium salt, an organic solvent, and an electrolyte additive is provided. The electrolyte additive is a meta-stable state nitrogen-containing polymer formed by reacting Compound (A) and Compound (B). Compound (A) is a monomer having a reactive terminal functional group. Compound (B) is a heterocyclic amino aromatic derivative as an initiator. A molar ratio of Compound (A) to Compound (B) is from 10:1 to 1:10. A lithium secondary battery containing the non-aqueous electrolyte is further provided. The non-aqueous electrolyte of this disclosure has a higher decomposition voltage than a conventional non-aqueous electrolyte, such that the safety of the battery during overcharge or at high temperature caused by short-circuit current is improved.

An electrical double-layer capacitor showing a sleight increase of resistance when used under continuous application of high voltage and maintaining high energy residual ratio after standing for a long time includes an electrode element including a pair of electrodes disposed opposite to each other with a separator interposed therebetween, and is impregnated with a nonaqueous electrolyte solution prepared by dissolving quaternary ammonium salts into cyclic carbonates and containing impurities of 30 ppm or less of glycols, 30 ppm or less of primary alcohols and less than 20 ppm of tertiary amines. The water content may be 50 ppm or less. The quaternary ammonium salt may be triethylmethylammonium tetrafluoroborate. The cyclic carbonate may be propylene carbonate. The nonaqueous electrolyte solution may have a concentration of 0.1 to 2.5 mol / liter. The electrode may be a polarizable electrode composed of activated carbon.

The invention discloses high-voltage electrolyte and a lithium ion battery using the electrolyte. The invention is realized by the following technical scheme: the high-voltage electrolyte comprises a non-aqueous solvent, lithium salt and an additive, wherein the non-aqueous solvent is a carboxylic ester compound which accounts for 1-40% by mass of the high-voltage electrolyte; the additive is any one or more of lithium bis(oxalate)borate (Li BOB), fluoroethylene carbonate (FEC) and ethylene glycol bis(propionitrile) ether. The high-voltage electrolyte contains carboxylic ester solvents capable of improving an electrode / electrolyte interface, and through optimized combination of the carboxylic ester solvents, Li BOB, FEC, ethylene glycol bis(propionitrile) ether and other various additives, the good cycle performance of a high-voltage battery can be ensured, meanwhile, the high-temperature storage performance of the high-voltage battery can be effectively improved, and gas generation of the battery under high-voltage high-temperature storage condition can be obviously inhibited.

The invention discloses a non-aqueous electrolyte solution for a high-voltage lithium ion secondary battery. The non-aqueous electrolyte solution comprises a non-aqueous solvent, a lithium salt dissolved in the non-aqueous solvent and additives, wherein the non-aqueous solvent comprises 1-15mass% of fluorobenzene in the electrolyte; and the additives comprise fluoroethylene carbonate (FEC) and a tri-nitrile material. Due to the non-aqueous electrolyte solution for the high-voltage lithium ion secondary battery, the high-voltage lithium ion secondary battery can obtain excellent cycling performance and high-temperature performance.

The invention discloses an electrolyte containing benzene dinitrile and a lithium ion battery applying the electrolyte. The electrolyte containing the benzene dinitrile comprises a non-aqueous solvent, a lithium salt and an additive, wherein the non-aqueous solvent is a carboxylic acid ester compound with a mass percentage of 1-40% in the electrolyte containing the benzene dinitrile; the additive comprises fluoroethylene carbonate (FEC) and at least one of benzene dinitrile compounds having a structure shown in a formula I, the formula I is shown in the specification, and n is an integer from 1 to 3; in 0.01-5% of the benzene dinitrile compound in the additive, double nitrites containing carbons of 1 to 3 are connected at ortho positions, meta positions and para positions of a benzene ring, an acetonitrile radical group (-C-CN) on the benzene ring can be complexed with metal ions such as Co<3+> in a positive active material, thus, electrolyte decomposition is reduced, the dissolution of the metal ions is suppressed, a positive pole is protected, and the high-temperature performance of the battery is improved.

The invention discloses a high voltage electrolyte and a lithium ion battery using the electrolyte. The high voltage electrolyte comprises non-aqueous solvents, a lithium salt and additives; the non-aqueous organic solvents are carbonic ester compounds and carboxylic ester compounds with contents of 1-40%; the additives are fluoroethylene carbonate (FEC) and alkene dinitrile compound. Carboxylic ester solvents for improving electrode / electrolyte interfaces are contained in the high voltage electrolyte. The high voltage battery is ensured to obtain excellent cycle performance through optimized combination of various additives such as fluoroethylene carbonate and alkene dinitrile; meanwhile, the high temperature storage performance of the high voltage battery is effectively improved; and the battery is clearly restrained from generating gas in high voltage and high temperature storage.

The invention relates to a polycarbonate cross-linked solid polymer electrolyte and an application thereof in a secondary lithium battery. The decomposition voltage of the solid polymer electrolyte is4.5-6.0 V, the ionic conductivity of the solid polymer electrolyte is 0.01-9 mS.cm<-1 >, the tensile strength of the solid polymer electrolyte is 5-400 MPa, and the solid polymer electrolyte can be applied to a high-voltage lithium battery. The invention also provides an application example of the polymer electrolyte in a secondary lithium battery.

The invention provides a halogeno-cyclic-sulfite, which is halogenated compound of cyclic sulfite. The halogenated compound contains sulfurous-ethylene-ester,fluoride of sulfurous-propylene-ester, chloride, bromidum and iodide. The halogeno-cyclic-sulfite has a high decomposition voltage, which is put in the electrolyte of lithium batteries, then the decomposition voltage of the overall lithium can be improved, so that the practical application of lithium secondary batteries with high electrical potential can be realized. Meanwhile, the halogeno-cyclic-sulfite can inhibit self-discharging of sulfur battery to add this kind of material in the electrolyte of lithium batteries to increase the discharge capacity of lithium-sulfur batteries obviously.

The invention relates to high-voltage electrolyte and a lithium ion battery using the same. The high-voltage electrolyte comprises a non-aqueous solvent, and lithium salt and additives dissolved in the non-aqueous solvent; the non-aqueous solvent comprises 1-40 mass% of carboxylic ester compound; and the additives comprise fluoroethylene carbonate (FEC) and 3-thiopheneacetonitrile. The electrolyte is optimized and combined through the carboxylic ester solvent capable of improving the electrode / electrolyte interface, and a plurality of additives of fluoroethylene carbonate (FEC), 3-thiopheneacetonitrile and the like, so as to ensure that the lithium ion battery using the electrolyte can obtain lower internal resistance, and meanwhile the cycle performance and the high temperature performance of the high-voltage batteries are effectively improved.

The invention discloses an electrolyte for a high-voltage lithium ion battery and the high-voltage lithium ion battery. Additives of the electrolyte comprise ethylene glycol bis(propionitrile) ether and cyclic anhydride containing unsaturated double bonds; the electrolyte is used for the lithium ion battery, and can enable the lithium ion battery to maintain good cycle performance and high-temperature storage characteristic at high voltage.

The invention discloses a multifunctional organogel, and a preparation method thereof. The raw materials of the multifunctional organogel comprise a solvent, a monomer, a crosslinking agent, an electrolyte salt, and an initiator; the volume ratio of the solvent to the monomer is controlled to be 1:5-5:1; the molar ratio of the crosslinking agent to the monomer is controlled to be 0.05 to 10%; themolar ratio of the initiator to the monomer is controlled to be 0.1 to 10%; and the concentration of the electrolyte salt in a mixed solution of all the raw materials ranges from 0.1 to 5mol / L. The multifunctional organogel possesses high transparency, high stretching performance, and high conductivity; the temperature resistance and the stability are better than those of conventional hydrogel materials; the temperature resistant range is very wide; the elongation at break is 1219% or higher; and the application prospect in the field of flexible electron and flexible machine is promising.

The invention discloses a ternary cathode material lithium ion battery electrolyte which comprises the following raw materials: an organic solvent, a lithium salt, a film-forming additive and a functional additive, and the functional additive comprises a low-impedance lithium salt, a sulfonate organic matter and a borate compound. Through the synergistic effect generated by using the three additives of the low-impedance lithium salt, the sulfonate organic matter and the borate compound, the ternary positive electrode material battery has excellent discharge performance in a low-temperature environment, and when the working voltage is 4.4 V or above, the high-temperature cycle performance is excellent, so that the electrolyte has a wide application prospect in a ternary battery system.

The invention discloses a nonaqueous electrolyte solution for a high-voltage lithium ion secondary battery. The nonaqueous electrolyte solution comprises nonaqueous organic solvent, lithium salt and additives, wherein the lithium salt and the additives are dissolved in the nonaqueous organic solvent. The nonaqueous organic solvent is a carboxylic acid ester compound with the mass percentage content being 1%-40% in the nonaqueous electrolyte solution. The additives comprise fluoroethylene carbonate (FEC), Li TFSI and at least one of compounds with the structures shown in the formula I (please see the specification for the formula), wherein R1 and R2 in the formula represent hydrogen or an alkyl group composed of 1-5 carbon atoms. The electrolyte solution for the high-voltage lithium ion secondary battery has the advantage that the high-voltage lithium ion secondary battery can achieve good cycle performance and high-temperature performance.

The invention discloses the application of a multifunctional organic gel as a conductive medium. The preparation raw materials of the multifunctional organic gel comprise a solvent, a monomer, a crosslinking agent, an electrolyte salt and an initiator, the volume ratio of the solvent to the monomer is 1:5 to 5:1, the molar ratio of the crosslinking agent to the monomer is 0.05% to 10%, the molar ratio of the initiator to the monomer is 0.1% to 10%, and the concentration of the electrolyte salt in a mixed solution of all the raw materials is 0.1 mol / L to 5 mol / L. When the organic gel is used asa conductive medium, since the organic gel has good electrical conductivity, a bulb can be lighted when the organic gel is used as a conductive line to energize the bulb, and an LED lamp bead can belighted when the organic gel is used as a conductive substrate to energize the LED lamp bead attached to the conductive substrate.

The invention provides a battery separator and a preparation method thereof, the battery separator comprising the following components prepared in parts by mass: polyvinylidene fluoride 10-25 parts, pore forming agent 1-5 parts, alumina 0.001-0.01 part, and dimethylacetamide 72-89 parts. The battery separator provided by the invention adopts polyvinylidene fluoride and alumina, and the prepared blended polymer separator has good thermal stability, and the thermal decomposition temperature is as high as 460 DEG C and the decomposition voltage is 4.6 V, which is obviously improved compared withthe PE membrane. The preparation method of the battery separator provided by the invention has the advantages of simple process, strong operability and low production cost, and the prepared battery separator has good thermal stability, high decomposition voltage and good liquid retention rate, and has practical feasibility and practicability.

The invention provides an aqueous hybrid supercapacitor and a preparation method thereof, belongs to the technical field of energy and power electronic components, and aims at solving the problems that an existing aqueous hybrid supercapacitor is heavy and complicated in structure and the preparation method is fussy. The aqueous hybrid supercapacitor comprises a positive plate, a negative plate, a membrane between the positive plate and the negative plate and an electrolyte, wherein the positive plate is a nickel foam plate or an aluminum foil plate coated with a mixture of a lithium-containing composite metal oxide LiMxOy, a conductive agent, a binder and an oxygen inhibiting additive; the negative plate is the nickel foam plate, copper foil or a tinned steel mesh coated with another mixture of activated carbon, the conductive agent, the binder and the oxygen inhibiting additive; the membrane is a modified non-woven fabric membrane; the electrolyte is a lithium-containing neutral aqueous solution and a conductive support electrolyte; and the conductive support electrolyte is a potassium ion-containing neutral aqueous solution. The structure and the components of the aqueous hybrid supercapacitor are simple and practical; and the preparation method is simple and easy, and is suitable for preparation of the aqueous hybrid supercapacitor.

The invention discloses an aqueous electrolyte. The aqueous electrolyte comprises a domain-limiting water molecule functional solute, water and an electrolyte, wherein the water-limiting water molecule functional solute is selected from one or more of sucrose, maltose and fructose, and the mass percentage of the domain-limiting water molecule functional solute in the aqueous electrolyte is 50% orabove; and the electrolyte is alkali metal and / or alkaline earth metal, and / or a soluble salt or a soluble hydroxide of zinc. The aqueous electrolyte is provided with a high-voltage window and a wideworking temperature range, and is suitable for a high-voltage low-temperature-resistant aqueous hybrid supercapacitor. The invention also discloses an application of the aqueous electrolyte and an electrochemical energy storage device comprising the aqueous electrolyte.

A non-aqueous electrolyte including a lithium salt, an organic solvent, and an electrolyte additive is provided. The electrolyte additive is a meta-stable state nitrogen-containing polymer formed by reacting Compound (A) and Compound (B). Compound (A) is a monomer having a reactive terminal functional group. Compound (B) is a heterocyclic amino aromatic derivative as an initiator. A molar ratio of Compound (A) to Compound (B) is from 10:1 to 1:10. A lithium secondary battery containing the non-aqueous electrolyte is further provided. The non-aqueous electrolyte of this disclosure has a higher decomposition voltage than a conventional non-aqueous electrolyte, such that the safety of the battery during overcharge or at high temperature caused by short-circuit current is improved.

The invention discloses a long-life lithium ion battery ternary positive electrode material, which comprises a ternary material as a substrate and a polymer coating layer coating the surface of the ternary material, wherein the polymer comprises a polycarboxylate polymer compound with a structure. The invention also provides a preparation method and application of the long-life lithium ion batteryternary positive electrode material. The long-life lithium ion battery ternary positive electrode material has good mechanical properties and excellent capacitance characteristics, is cheap, and is simple to prepare, and can be popularized as a commercial capacitor material.

The invention relates to a morpholine ionic liquid. The chemical structural formula of the ionic liquid is shown as the specification, wherein R is alkyl of C2-C6; Y<-> is (CF3SO2)2N<-> or (FSO2)2N<->. The morpholine ionic liquid is completely formed by ions at room temperature or under a situation close to the room temperature, has the advantages of high electrical conductivity, low melting point, wide electrochemical window, no volatilization or inflammability, good thermal stability and no halogen impurities or toxicity, and can be applied to the field of preparation of supercapacitors or lithium ionic batteries with high specific capacity. Furthermore, the invention also relates to a preparation method and application of the morpholine ionic liquid.

The invention provides a phosphorus-doped platinum-nickel nanowire as well as a preparation method and application thereof, and belongs to the technical field of alkaline electrolytic water hydrogen evolution catalysts. According to the prepared phosphorus-doped platinum-nickel nanowire, Ni atoms are beneficial to adsorption of water molecules, P atoms are beneficial to adsorption of OH <->, adsorption of the water molecules and OH <-> is beneficial to acceleration of diffusion of H atoms adsorbed on the surface of the nanowire to Pt atoms, and then the output efficiency of hydrogen on the Pt atoms is improved.

The invention relates to a method for controlling metro stray current corrosion of reinforced concrete. The method includes: calcining layered double hydroxide (hydrotalcite), soaking the calcined hydrotalcite in a sodium hydroxide solution, conducting filtration with water and performing drying; mixing the dried hydrotalcite into a concrete cementing material, performing mixing in a stirrer, and conducting pouring molding to form concrete. The method provided by the invention changes the activity of ions in the solution so as to change the electromotive force of the electrode, and can reduce the driving force of electrolysis reaction and control the metro stray current corrosion of reinforced concrete.

The invention discloses a high-voltage electrolyte for a lithium-ion battery and an application thereof. The high-voltage electrolyte comprises a nonorganic solvent, an electrolyte lithium salt and anelectrolyte additive, wherein the electrolyte additive comprises 0.3-2.0% of PST and 0.3-2.0% of LiDFP on the basis of the total weight of the high-voltage electrolyte. According to the invention, through the optimal combination of PST and LiDFP in the electrolyte additive, the excellent cycle performance acquired by the high voltage battery is guaranteed, and meanwhile, the high-temperature storage property of the high voltage battery is effectively improved, the capacity retention ratio of the battery after high-temperature storage is increased and the thickness swelling rate thereof is reduced. The charging cut-off voltage of the lithium-ion battery using the high-voltage electrolyte disclosed by the invention is more than 4.2V but less than or equal to 4.4V, the high-voltage electrolyte is capable of protecting the anode and preventing the metal ions from dissolving out and the high-voltage electrolyte also can form a stable SEI film on a cathode so that the excellent cycle performance and high-temperature storage property of the high-voltage electrolyte can be guaranteed.

The invention discloses a power lithium battery containing graphene. The power lithium battery comprises an electrode group and a power lithium battery electrolyte solution, the electrode group and the power lithium battery electrolyte solution are sealed in a battery shell, the electrode group includes a positive electrode, a negative electrode and a diaphragm, the power lithium battery electrolyte solution comprises the following raw materials by weight: 2-6 parts of lithium hexafluorophosphate, 26-40 parts of ethyl methyl carbonate, 16-25 parts of dimethyl carbonate, 8-15 parts of butylidene carbonate, 6-12 parts of dipropyl carbonate, 5-8 parts of ethyl formate, 4-9 parts of propyl acetate, 10-14 parts of 1, 2-dimethoxyethane, 0.6-1 part of modified graphene, and 0.5-0.8 part of an additive a. The power lithium battery prepared from the power lithium battery electrolyte solution provided by the invention has excellent high and low temperature performance and cycle performance. The power lithium battery electrolyte solution provided by the invention is worth popularizing and applying.

The invention discloses a lithium ion battery electrolyte solution non-combustible in a wide temperature area, and belongs to the field of lithium ion battery study. The lithium ion battery electrolyte solution comprises lithium salt as well as a polyether and derivative organic solvent. The lithium ion battery electrolyte solution is characterized in that the polyether and derivative organic solvent is taken as the solvent for the lithium ion battery to replace conventional carbonic ester combustible solvent; portions of polyether and derivatives are provided with low melting points, are still in liquid state at environment with temperature of -80 DEG, and exist stably at a high temperature of 200 DEG. Compared with conventional electrolyte solution, the lithium ion battery electrolyte solution acts out relatively high ionic electric conductivity in a relatively wide temperature range (-40 to 80 DEG), is high in flashing point and burning point, and acts out excellent specific capacity, cycle performance and security in wide temperature range as conventional battery electrolyte solution.

The invention discloses lithium ion battery gel polymer electrolyte of supported doped nano particles, a preparation method and an application thereof. The preparation method of the electrolyte comprises the following steps: firstly, nano particles are doped in a mixture PEO and P (VDF-HPF) and are dissolved by using a solvent to obtain gel; then, a supporter membrane which is not activated and has good mechanical strength is soaked in the gel, taken out and aired to obtain a polymer membrane; and finally, after being dried, the membrane is soaked in electrolyte in a glove box so as to obtainthe electrolyte. The polymer electrolyte has higher ionic conductivity and mechanical strength; simultaneously, the preparation time is short, the production efficiency is high, the invention is compatible to the existing equipment for preparing liquid state lithium ion batteries, and the production cost required by industrialization is greatly reduced.

The invention discloses an electrolyte for reducing self-discharge of a lithium ion battery. The electrolyte is used as a lithium ion battery using Li3V2(PO4)3 as a cathode material. The electrolyte composition includes: the additive being LiBOB, the solvent being mixed by propylene carbonate and diethyl carbonate mixed (volume ratio is 1:1), the lithium salt being LiPF6, and the concentration being 1 mol / L. the electrolyte effectively reduces self-discharge of Li3V2(PO4)3 lithium-ion battery and significantly improves the energy storage performance.

The present invention provides process of decomposing zinc oxosalt inside ionic liquid to realize nanometer zinc oxide crystal growth with controllable crystal face. The process includes the following steps: mixing the water solution of ethylene diamine, trioctylamine or methylamine with oleic acid; adding zinc oxosalt, maintaining at 270-400 deg.c for 20-240 min, cooling, taking the yellowish precipitate, and washing with n-hexane or ethanol to obtain the nanometer zinc oxide crystal. Ionic liquid is introduced into the reaction of decomposing zinc oxosalt, and the electrostatic effect between the positive and negative ions in the ionic liquid and the polar surface of zinc oxide is utilized in alter the surface energy of the polar surface so as to control crystal face of growing zinc oxide crystal. The process of the present invention has the advantages of novel crystal configuration, simple apparatus, easy operation, mild preparation condition, no pollution, etc.

The invention provides a method for manufacturing a high-energy-density pouch battery, which includes the following steps: Step 1: Wrap the bottom of the lithium battery core with an auxiliary electrode of aluminum foil, and use a separator to isolate and insulate the battery core and the auxiliary electrode of the aluminum foil , to obtain a pouch battery after assembly; step 2: inject electrolyte 1 into the pouch battery obtained in step 1, and use the aluminum foil auxiliary electrode for pre-charging after sealing; step 3: take out the aluminum foil auxiliary electrode after pre-charging, and remove free Electrolyte 1 is injected into electrolyte 2, and after post-treatment, a high-energy-density pouch battery is obtained. In the present invention, an aluminum foil auxiliary electrode is preset at the bottom of the lithium ion battery core, and through the synergistic effect of the aluminum foil auxiliary electrode and the electrolyte solution 1 containing additives, the pre-embedded lithium on the negative electrode of the lithium ion battery is realized during the small current precharging process, solving the problem of Or improve the problem of low charging and discharging efficiency of lithium-ion batteries for the first time, thereby increasing the capacity and energy density of lithium-ion batteries.

The invention discloses a multifunctional organogel, and a preparation method thereof. The raw materials of the multifunctional organogel comprise a solvent, a monomer, a crosslinking agent, an electrolyte salt, and an initiator; the volume ratio of the solvent to the monomer is controlled to be 1:5-5:1; the molar ratio of the crosslinking agent to the monomer is controlled to be 0.05 to 10%; themolar ratio of the initiator to the monomer is controlled to be 0.1 to 10%; and the concentration of the electrolyte salt in a mixed solution of all the raw materials ranges from 0.1 to 5mol / L. The multifunctional organogel possesses high transparency, high stretching performance, and high conductivity; the temperature resistance and the stability are better than those of conventional hydrogel materials; the temperature resistant range is very wide; the elongation at break is 1219% or higher; and the application prospect in the field of flexible electron and flexible machine is promising.