33results about How to "Wide liquid temperature range" patented technology

The wet spinning method of polyacrylonitrile fibre includes the following steps: dissolving fibre-grade polyacrylonitrile resin in the solvent to obtain spinning solution, making the spinning solution the passed through spinneret component to form primary fibre, then making the primary fibre be passed through a coagulating bath and coagulated to form the invented fibre. Said invention also provides the chemical structure formula of said solvent, and the polyacrylonitrile resin content in the spinning solution is 10-35 wt%.

The wet spinning method of pelyacrylonitrile fibre includes the following steps: dissolving fibre-grade polyacrylonitrile resin in the solvent to obtain spinning solution, making the spinning solution be passed through spinneret component to form primary fibre, then making the primary fibre be passed through a coagulating bath and coagulated to form the invented fibre. Said invention also provides the chemical structure formula of said solvent, and the polyacrylonitrile resin content in the spinning solution is 10-35 wt%.

The invention provides a polyalkylcyclopentane lubricating oil composition, and a preparation method and an application thereof, and belongs to the field of liquid lubrication. Guerbet alcohol Guerbetacid ester and tricresyl phosphate are ester compounds and can be well mixed and dissolved to form a composite additive; and the base oil and the Guerbet alcohol Guerbet acid ester have similar longside chain structures, so the polyalkylcyclopentane lubricating oil composition has the advantages of good compatibility, extremely wide liquid temperature range, extremely low volatilization loss, excellent lubricating performance and excellent high and low temperature performances, and can be used for liquid lubrication under harsh conditions such as a micro electro mechanical system and space machinery.

The invention relates to an application method of a thermal power flexibility multi-source coordination'active balance 'process system, which is characterized by comprising the following steps of: setting a thermal power flexibility multi-source coordination'active balance service' process system which comprises a flywheel energy storage frequency modulation system, a fused salt energy storage frequency modulation system and a thermal power flexibility'active balance 'process monitoring control system; controlling a flywheel energy storage frequency modulation system to provide rotational inertia or primary frequency modulation active balance service of the thermal power plant; a flywheel energy storage frequency modulation system and a fused salt energy storage frequency modulation system are fused with a thermal power generating unit to form a virtual frequency modulation power supply so as to provide a multi-source coordination active balance service. The method can be widely applied to the technical field of active balance service of thermal power flexibility transformation.

The invention discloses a wide-temperature electrolyte for lithium ion battery, which is characterized in that the electrolyte is composed of an ionic liquid like ether solvent, an auxiliary organic solvent and a low-temperature additive. The electrolyte has low viscosity and freezing point and can maintain high ionic conductivity at ultra-low temperature. Forming a thin and dense solid electrolyte membrane on the surface of the negative electrode; On the premise of maintaining good cycling performance at room temperature, the charge-discharge capability at low temperature and safety performance at high temperature are effectively improved, and the application range of lithium battery is effectively expanded.

The invention discloses a conductive polymer-coated silicon-based negative electrode sheet, and a preparation method and an application thereof. The silicon-based negative electrode sheet is used as amatrix, ionic liquid is used as a reaction medium, a polymer monomer generates an electrochemical self-polymerization reaction in a gap and on the surface of a matrix through an electrochemical polymerization reaction, and a conductive polymer film with a controlled thickness is formed on the surface of the matrix to improve the interfacial properties and the cycling stability of the silicon-based negative electrode sheet; and then the electrode sheet is used as a positive electrode, a metal lithium sheet is used as a negative electrode, an external circuit is connected to control the currentto perform electrochemical pre-lithium, so as to improve the first-time coulombic efficiency of the matrix, and the conductive polymer-coated silicon-based negative electrode sheet is prepared. During the electrochemical polymerization reaction, the thickness of the conductive polymer film can be controlled by electric quantity, no catalyst is needed, and mass production can be realized; and thereaction medium is the ionic liquid, which has almost no vapor pressure and a wide liquid temperature range, so compared with other organic/inorganic solvents, it is more environmentally friendly, green and pollution-free.

The invention relates to a continuous production process of p-xylylene dichloride and a device, and belongs to the technical field of organic chemical synthesis. The device provided by the invention comprises a feed tank, wherein the feed tank is successively connected with a third order chloride kettle, a second order chloride kettle, a first order chloride kettle, a knockout drum and a rectifying tower; the first order chloride kettle is connected with the second order chloride kettle in parallel, and the second order chloride kettle is connected with the third order chloride kettle in parallel; the continuous production process comprises the steps of mixing paraxylene and an ionic liquid catalyst, then introducing chlorine to the mixture under the irradiation of an LED (light-emitting diode) light source, obtaining p-xylylene dichloride reaction liquid after the third order chlorine reaction, cooling and separating the p-xylylene dichloride reaction liquid, performing vacuum distillation, then collecting cut fraction to obtain the p-xylylene dichloride. The continuous production process of the p-xylylene dichloride solves the problem in the existing process that the production is discontinuous, the product yield is low and the production cost is high, has the characteristics of simple technological process, short production cycle and high product purity, and the device is simple in structure and is liable to operate.

The invention provides a lithium ion battery electrolyte and a lithium ion battery. The lithium ion battery electrolyte comprises a solvent, an electrolyte lithium salt and an additive, wherein the solvent comprises a carbonic ester solvent and a carboxylic ester solvent. According to the total amount of the electrolyte being 100%, the additive comprises the following components in percentage by mass: 0.1-1% of butanedinitrile; 0.1%-1% of vinylene carbonate; 2%-10% of fluoroethylene carbonate; 0.1%-1% of 1, 3-propane sultone; and 0.1%-1% of additive lithium salt. The lithium ion battery electrolyte composed of the mixed solvent, the mixed additive and the electrolyte lithium salt in a specific ratio is adopted so that the high-temperature cycle and high-temperature storage performance of the lithium ion battery can be remarkably improved.

The invention relates to a method for preparing glycolic acid by electrocatalytic reduction of CO2 in a heteropolyacid ionic liquid indium dual-catalytic system. The invention belongs to the field ofpreparation of glycolic acid by electrocatalytic reduction of CO2. The invention aims to solve the technical problems that the existing CO2 reduction reaction is generally 2e-, 4e- transfer reaction,the deep reduction of CO2 cannot be realized, and the ionic liquid preparation process of the existing reaction system is complex. The method comprises the following steps: preparing polyoxometallateionic liquid (n-Bu4N) 3SVW11O40, dissolving the polyoxometallate ionic liquid (n-Bu4N) 3SVW11O40 in acetonitrile to obtain a catholyte, and carrying out electrocatalytic reduction on carbon dioxide byusing dilute sulfuric acid as an anolyte to prepare liquid-phase products ethanol and acetic acid which are greater than or equal to C1. The method provided by the invention is simple, effectively solves the problems that the existing polyacid ionic liquid is rare in variety and short in quantity, is mild in reaction condition and low in economic cost, and can improve the energy efficiency to 4-5times, and the Faraday efficiency of the obtained ethanol is 7-16%, and the Faraday efficiency of the obtained acetic acid is 14-67%.

The invention discloses a low-electric leakage electrolytic capacitor. The capacitor comprises a wound type capacitor assembly, a mixed type conductive medium and a packaging body; an anode foil, a cathode foil and an isolating membrane between the anode foil and the cathode foil are wound so as to form the wound type capacitor assembly; the mixed type conductive medium is impregnated in the woundtype capacitor assembly; the mixed conductive medium contains a conductive polymer and an ionic liquid; and the packaging body completely wraps the wound type capacitor assembly and the mixed type conductive medium. The low-electric leakage electrolytic capacitor of the invention has the superior characteristics of a solid-state low-electric leakage electrolytic capacitor and can alleviate an electric leakage condition.

The invention relates to a method for preparing nano-scale lithium manganese phosphate. The method comprises the following steps of S1, preparing an aluminum mesh based lithium phosphate pole piece; S2, using a manganese sheet as an anode, carrying out electrolysis in imidazole ionic liquid, and introducing a manganese ion into the imidazole ionic liquid, so as to form manganese ion-containing imidazole ionic liquid; S3, using the aluminum mesh based lithium phosphate pole piece as a cathode, carrying out electrodeposition in the manganese ion-containing imidazole ionic liquid, and generating the nano-scale lithium manganese phosphate on the cathode. According to the method, lithium manganese phosphate which can be used for a positive-pole material of a lithium-ion battery is prepared for the first time by utilizing the electrodeposition in the imidazole ionic liquid; the sources of raw materials are simple; the cost is low; the granularity of the made nano-scale lithium manganese phosphate is more uniform. Moreover, the imidazole ionic liquid can be circularly used for multiple times; further, a side reaction is not generated; the preparation process is green and environment-friendly; the technique is simple; the process is easily controlled; the energy consumption is low.

The invention relates to an electrolyte and an air battery preparation method, which belong to the technical field of new energy, and in particular to a lithium air battery ionic liquid electrolyte and an air battery preparation method. The electrolyte of the invention has good material compatibility, does not react with other structures of the battery; has wide electrochemical window and high electrochemical stability, and can meet the application of high voltage and high capacity battery systems; has low toxicity, and is environmentally friendly. The lithium air battery made of electrolyte improves the specific capacity and safety of the battery, has strong practicability, and establishes a foundation for the next large-scale production.