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 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 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 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 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.

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 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.