106 results about "Succinonitrile" patented technology

The invention discloses a deep eutectic-based polymer semi-solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid-state lithium metal batteries. The method comprises the following steps: mixing and melting lithium salt and succinonitrile to obtain a deep eutectic solution; dissolving a polymer monomer and a thermal initiator in the deep eutectic solution at normal temperature to obtain a precursor solution; the method comprises the following steps: soaking a lithium metal negative electrode in fluoroethylene carbonate, and airing to obtain a pretreated negative electrode; and assembling the battery according to the sequence of the negative electrode shell, the pretreated negative electrode, the cellulose membrane, the positive electrode and the positive electrode shell, and performing in-situ polymerization reaction in a heating state to obtain the lithium ion battery. The semi-solid electrolyte obtained through in-situ polymerization has relatively good interfacial compatibility with the lithium metal negative electrode, so that the battery performance is remarkably improved; the addition of a small amount of polyester containing a plurality of urea groups not only retains the high electrochemical performance of a liquid electrolyte, but also has the high safety of a solid electrolyte.

The invention discloses a flame-retardant polyoxyethylene composite solid electrolyte and a preparation process thereof, and relates to the technical field of solid electrolytes. Comprising the following steps: 1, mixing and stirring modified polyacrylonitrile, polyacrylonitrile and N, N-dimethylformamide, and putting the mixture into an electrostatic spinning machine to obtain a polyacrylonitrile fiber membrane; 2, mixing and stirring the modified beta-cyclodextrin, acetonitrile, polyoxyethylene, lithium perchlorate and succinonitrile to obtain a mixed solution; and 3, putting the polyacrylonitrile fiber membrane into a polytetrafluoroethylene mold, dropwise adding the mixed solution, and drying and demolding at 40 DEG C to obtain the composite solid electrolyte. The composite solid electrolyte has the beneficial effects that beta-cyclodextrin and polyacrylonitrile are modified, so that the compatibility of beta-cyclodextrin and polyacrylonitrile with a polymer matrix is improved, and the ionic conductivity and tensile strength of the composite solid electrolyte are improved. Meanwhile, the grafted spirocyclic phosphate group enables the overall flame retardance of the composite solid electrolyte to be improved to a certain extent.

The invention belongs to the technical field of batteries, and particularly relates to a dry-method flexible self-supporting composite positive electrode composition, a preparation method thereof and application of the dry-method flexible self-supporting composite positive electrode composition in a lithium ion battery. The dry-method flexible self-supporting composite positive electrode composition comprises a positive electrode active material, a binder, a conductive agent and an additive, wherein the additive comprises an ionic liquid composition or a lithium-containing ceramic powder and ionic liquid composition; the ionic liquid composition comprises an ionic liquid and a lithium salt component, and the lithium salt component comprises a lithium salt, or the lithium salt and succinonitrile. The lithium-containing ceramic powder and the ionic liquid additive are applied to the dry-method composite positive electrode, and the lithium ion battery prepared from the dry-method composite positive electrode has excellent charge-discharge cycle performance.

The invention provides a battery and an electric device. A positive plate comprises a positive active material, and the positive active material is doped and / or coated with a lanthanum element; the surface of the diaphragm is coated with a ceramic coating; the electrolyte comprises a first solvent, a second solvent, a first additive and a second additive; the first solvent comprises a cyclic carbonate compound, the second solvent comprises a chain fluorosulfonamide compound, the first additive comprises mannitol carbonate sulfate, and the second additive comprises succinonitrile; the lanthanum element is doped / coated on the positive active material, so that the release of lattice oxygen at high voltage or high temperature can be effectively inhibited, and the exothermic reaction activity at the thermal runaway initial temperature is reduced; the first additive and the second additive in the electrolyte respectively form a compact CEI film and an SEI film with high thermal stability on the surfaces of the positive electrode and the negative electrode; the diaphragm ceramic coating provides a physical barrier, the thermal shrinkage temperature of the diaphragm is increased, and internal short circuit is prevented.

The invention discloses a lithium metal battery eutectic gel electrolyte and a preparation method and application thereof, and belongs to the field of solid electrolyte. The eutectic gel electrolyte is prepared by carrying out a photocuring reaction on a photocuring precursor solution containing a photoinitiator, and the photocuring precursor solution contains a bi-component liquid compound and a deep eutectic solvent; the two-component liquid compound comprises 4-acryloyl morpholine and a photocurable polyethylene glycol derivative; the deep eutectic solvent is formed from a liquid mixture comprising succinonitrile, lithium bis (trifluoromethylsulfonyl) imide and fluoroethylene carbonate. The eutectic gel electrolyte is composed of a deep eutectic solvent with functional groups such as cyano and sulfonyloxy, and a polymer electrolyte with functional groups such as ether oxygen and a unique skeleton structure. The advantages of high ionic conductivity, wide electrochemical window, high interface stability and the like can be endowed based on the interaction between functional groups and the space confinement effect of a polymer electrolyte skeleton structure.

The invention discloses a preparation method of a high-performance modified dry-method electrode and application of the high-performance modified dry-method electrode in a lithium metal battery, the method comprises the following steps: step 1, heating and hot-melting succinonitrile under a hydrothermal condition to obtain clear and transparent liquid, and then adding lithium salt into the clear and transparent liquid to complete preparation of a dry-method modified additive; 2, premixing a positive electrode material, vapor-phase growth carbon fibers and a dry-method modified additive; 3, adding an adhesive into the premixed material to obtain a modified dry-method electrode material; and step 4, pouring the modified dry-method electrode powder into a mortar, after preliminary film formation, gradually thinning to 60-75 m in thickness under a roller press, and finally performing hot rolling with a current collector to complete the preparation of the modified dry-method electrode. According to the invention, by adding the additive into the dry electrode, an excellent high-voltage-resistant electrode interface is constructed, and the lithium ion conduction rate of the electrode is improved, so that the electrochemical performance of the dry electrode is further improved, and the application of the dry electrode in a high-voltage lithium metal battery is promoted.

The invention relates to an electrolyte, a secondary battery and an electronic device. Specifically, the invention provides the electrolyte, the electrolyte comprises propylene carbonate, propyl propionate, butanedinitrile and 1, 3, 6-hexane trinitrile, relative to 100 parts by mass of the electrolyte, the propylene carbonate accounts for 14 to 20 parts by mass, the propyl propionate accounts for 10 to 55 parts by mass, the butanedinitrile accounts for 0.3 to 4 parts by mass, and the 1, 3, 6-hexane trinitrile accounts for 1 to 6 parts by mass; the electrolyte further comprises adiponitrile, and the adiponitrile is 0.05-0.5 part by mass relative to 100 parts by mass of the electrolyte. According to the invention, the low-temperature discharge performance and the over-temperature safety performance of the secondary battery can be improved.

The invention belongs to the technical field of development and manufacturing of solid-state electrolyte materials and solid-state lithium batteries, and particularly relates to an all-solid-state oxide-polymer electrolyte membrane as well as a preparation method and application thereof. The electrolyte membrane comprises a polymer matrix, a lithium salt, butanedinitrile, lithium lanthanum zirconium tantalum oxide and graphite phase carbon nitride, the polymer matrix, the lithium salt, the butanedinitrile, the lithium lanthanum zirconium tantalum oxide and the graphite phase carbon nitride are uniformly mixed to form a solid film; the polymer matrix is polyacrylonitrile and forms a framework of the electrolyte membrane; the lithium salt, the butanedinitrile, the lithium lanthanum zirconium tantalum oxide and the graphite phase carbon nitride are at least physically and uniformly dispersed in the polymer matrix. The electrolyte membrane can be prepared through the steps of slurry preparation, defoaming treatment, membrane forming processing, drying and curing and the like, and can be used in a solid-state lithium battery, so that the contact between the electrolyte membrane and an electrode interface is improved, side reaction is inhibited, the ion transmission efficiency and mechanical property are improved, the interface impedance is reduced, and the cycling stability and safety of the solid-state lithium battery are enhanced.

The invention discloses a low-temperature high-conductivity composite solid-state electrolyte membrane and a preparation method and application thereof, and relates to the technical field of solid-state lithium battery materials, the low-temperature high-conductivity composite solid-state electrolyte membrane comprises: a polymer matrix composed of poly (1, 3-dioxolame) and a polyvinylidene fluoride-hexafluoropropylene copolymer; the ion conduction network is composed of a metal organic framework filler with the surface modified with-SO3Li groups and sulfonic acid lithiated carbon nanotubes arranged in the axial direction of the polymer matrix; a first anti-freezing interface layer and a second anti-freezing interface layer are arranged on the surfaces of the two opposite sides of the polymer matrix, and the first anti-freezing interface layer and the second anti-freezing interface layer are butanedinitrile-glutaronitrile eutectic plastic crystal layers composed of butanedinitrile, glutaronitrile, lithium salt and a nano reinforcing agent respectively. The solid electrolyte is suitable for polar scientific investigation equipment, spacecrafts and other low-temperature environments, and solves the industrial problems of sharp increase of low-temperature grain boundary impedance and interface contact failure of the traditional solid electrolyte.

A solid electrolyte material contains an Li salt that has a fluorine-containing anion, an in organic filler, and a polymer. The inorganic filler has a surface modified with a fluorinated alkyl. The solid electrolyte material further includes succinonitrile. The inorganic filler contains at least one selected from the group consisting of SiO2, TiO2, ZrO2, and MgO; and the fluorinated alkyl contains at least one of a 1H, 1H, 2H, 2H-tridecafluoro-n-octyl group and a 1H, 1H, 2H, 2H-heptadecafluorodecyl group.

The present application discloses a eutectic gel electrolyte for lithium metal batteries and its preparation method and application, which belongs to the field of solid electrolytes. The eutectic gel electrolyte of the present invention is prepared by photocuring a photocurable precursor solution containing a photoinitiator, wherein the photocurable precursor solution contains a two-component liquid compound and a deep eutectic solvent; the two-component liquid compound contains 4-acryloylmorpholine and a photocurable polyethylene glycol derivative; the deep eutectic solvent is formed by a liquid mixture containing succinonitrile, lithium bis(trifluoromethylsulfonyl)imide and fluoroethylene carbonate. The eutectic gel electrolyte of the present invention is composed of a deep eutectic solvent having functional groups such as cyano and sulfonyloxy and a polymer electrolyte having functional groups such as etheroxy and a unique skeleton structure. It can give advantages such as high ionic conductivity, wide electrochemical window and high interface stability based on the interaction between functional groups and the spatial confinement of the polymer electrolyte skeleton structure.

Provided in the present application are a secondary battery and an electronic device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte solution. The positive electrode sheet comprises a composite current collector and a positive electrode material layer provided on at least one surface of the composite current collector. The positive electrode material layer comprises a lithium nickel cobalt manganese oxide compound. On the basis of the total molar amount of metal elements other than lithium, the molar percentage content of nickel in the lithium nickel cobalt manganese oxide compound is X, wherein X>80%. The electrolyte solution comprises adiponitrile and succinonitrile. On the basis of the mass of the electrolyte, the mass percentage content of adiponitrile is B1, and the mass percentage content of succinonitrile is B2, wherein 0.01≤X×B1 / B2≤90. The present application can improve the capacity retention ratio and lithium ion acceptance of a secondary battery after a high- or low-temperature impact test.

The invention belongs to the technical field of solid-state sodium metal batteries, and particularly relates to a solid-state plastic crystal electrolyte as well as a preparation method and application thereof. The solid plastic crystal electrolyte is mainly composed of two phases, wherein the first phase is a plastic crystal phase composed of succinonitrile, sodium salt and a fluoroethylene carbonate additive; the second phase is a polymer network phase formed by mixing two monomers with double bonds in proportion; the two phases are mixed according to a certain ratio and then subjected to in-situ curing under the action of an initiator and heating. The sodium metal battery prepared from the electrolyte simultaneously realizes good contact, high safety and good electrochemical performance of an electrolyte / electrode interface. The problems of safety of a traditional liquid electrolyte, poor electrochemical performance of a solid electrolyte and the like are solved. The method has great significance in application of the high-safety plastic crystal type electrolyte, and the application range of the solid plastic crystal type electrolyte in a sodium battery system is widened.

The invention relates to the field of batteries, in particular to an electrolyte and an electrochemical device. The electrolyte comprises an organic solvent, an electrolyte and an electrolyte additive, and the electrolyte additive comprises a nitrile additive A and a nitrile additive B; the nitrile additive A comprises at least one of acetonitrile or butanedinitrile; the nitrile additive B comprises at least one of compounds shown as a formula I, # imgabs0, and R1 and R2 are independently and optionally selected from hydrogen, a straight chain or branched chain cyano group with the carbon atom number of 1-10, a straight chain or branched chain alkoxy group with the carbon atom number of 1-10, and a straight chain or branched chain halogenated hydrocarbon with the carbon atom number of 1-5. By combining the nitrile additive A and the nitrile additive B, the high-temperature storage performance and the cycle performance of the battery can be effectively improved at the same time.

The invention provides a preparation method of 1, 4-butanediamine. The preparation method comprises the following steps: carrying out a first hydrogenation reaction on a succinonitrile solution and hydrogen under the catalysis of a first catalyst to obtain a first hydrogenation reaction product; carrying out second hydrogenation reaction on the first hydrogenation reaction product and hydrogen under the catalysis of a second catalyst to obtain 1, 4-butanediamine; wherein the first catalyst is a nickel-based catalyst loaded on Al2O3, and the second catalyst is a noble metal catalyst loaded on C. According to the present invention, the step-by-step hydrogenation method is adopted, the corresponding catalyst is utilized, the hydrogenation depth is controllable, the amino butyronitrile is mainly generated in the first step, and the 1, 4-butanediamine is prepared through the further hydrogenation in the second step, such that the side reaction can be effectively reduced, the produced by-product is less, the separation difficulty is low during the post-treatment, and the product purity is high. The method does not need to add other components such as ammonia gas to inhibit side reaction, and is simple in industrial process flow and easy to popularize and use.

The invention belongs to the technical field of batteries, and discloses a high-temperature-resistant composite diaphragm, a preparation method thereof and a lithium ion battery. The composite diaphragm comprises a diaphragm base material, a zinc borate coating and a polymer coating, the zinc borate coating is arranged on a single face or double faces of the diaphragm base material, the polymer coating is arranged on the surface of the zinc borate coating, and raw materials of the zinc borate coating comprise zinc borate, a binder and a solvent. The polymer coating is prepared from the following raw materials: methyl methacrylate, acrylic anhydride, succinonitrile, an initiator and lithium salt. The composite diaphragm disclosed by the invention does not generate obvious thermal shrinkage during high-temperature heating, and pores are closed during high-temperature heating, so that crosstalk between an oxidizing substance of a positive electrode and a reducing substance of a negative electrode is avoided, and a thermal runaway initiation temperature T2 is delayed or even avoided.

The decolorizing device is applied to the field of succinonitrile purification, a first rotating shaft is driven by a third motor to drive a rotating block to rotate, the rotating block rotates to enable a discharging rod to rotate, and due to the fact that one side of the discharging rod is inclined, activated carbon can be continuously conveyed to a discharging pipe through rotation of the discharging rod; the activated carbon enters a discharging pipe from a discharging pipe, a second motor rotates to drive an auger to rotate and discharge the activated carbon, and then new activated carbon is added from a feeding hopper, so that the purpose of conveniently replacing the activated carbon is achieved, the workload is reduced, and the replacement efficiency is improved; the rotating cylinder rotates to drive a transmission rod to reciprocate, the transmission rod moves to drive a connecting rod and a fixing frame to reciprocate, the connecting rod moves to drive a disturbance rod to move up and down, activated carbon is disturbed, the activated carbon is prevented from blocking a discharging pipe during discharging, smooth discharging of the activated carbon is guaranteed, and the activated carbon is convenient to replace.

The invention provides a lithium battery negative electrode with an interface polymer stable interface layer and a preparation method and application of the lithium battery negative electrode. The preparation method comprises the following steps: providing an alloy negative electrode substrate of which the surface is modified by an organic lithium interface layer; and coating a polymer electrolyte precursor containing an electron-deficient double-bond polymer monomer, lithium salt and succinonitrile on the surface of the negative electrode, sealing and standing for 1-24 hours, and triggering the electron-deficient double-bond polymer monomer to generate in-situ anionic polymerization on the surface of the alloy negative electrode substrate by using an organic lithium interface layer as an initiator, thereby obtaining the lithium ion battery negative electrode. A polymer interface layer chemically bonded with the substrate is formed on the surface of the lithium battery negative electrode. Through an innovative interfacial polymerization technology, a stable polymer interface layer is constructed on the surface of the alloy negative electrode, and the interface stability, the electrochemical performance, the structural integrity, the process practicability and other dimensions are remarkably improved.

The present invention provides a process and system for preparing succinonitrile, and the preparation process is as follows: dissolving a catalyst and a co-catalyst in a raw material, continuously heating a reactor and continuously introducing ammonia, and heating the reactor until the reaction temperature remains unchanged; when the reaction temperature reaches a certain value, maintaining or increasing the reaction temperature, slowly reducing the reaction pressure, and continuously discharging the water and unreacted ammonia generated in the reactor and discharging them into a water scrubber, and the waste gas after water absorption enters a water ring vacuum pump; stopping the ammonia feeding, turning on the water ring vacuum pump, maintaining the reaction pressure as a negative pressure, and during the negative pressure extraction process, the reaction temperature continues to decrease, and the reaction is continued for a period of time to obtain a succinonitrile reaction liquid. The present invention uses one of succinic acid, succinic esters, and succinic anhydride as a raw material, and provides a process and system for preparing succinonitrile from succinic acid, and the process has a wide source of raw materials, high purity, a simple production process, high safety, large-scale supply, and low cost.

The invention belongs to the field of organic chemical synthesis, and relates to a method for preparing butanediamine and co-producing pyrrolidine by using butanedinitrile, which comprises the following steps: S1, reacting acrylonitrile with hydrocyanic acid in a fixed bed reactor filled with a first catalyst to obtain butanedinitrile; the first catalyst is filled in a fixed bed reactor in a solid form, and the first catalyst comprises a carrier and an active component loaded on the carrier. And S2, dissolving the butanedinitrile obtained in the step S1 into a pyrrolidine ionic liquid solvent, then adding a second catalyst and alkali, then introducing hydrogen, and reacting to obtain butanediamine and pyrrolidine. According to the method, continuous and easy-to-separate production of butanedinitrile is realized, a by-product is directionally converted into tetrahydropyrrole with a high added value through a specific reaction system, and the safety, the economical efficiency and the resource utilization rate of the process are remarkably improved.

The present application discloses a secondary battery and an electronic device, the secondary battery comprising an electrolyte and a separator, the separator comprising a polyolefin base material and a coating layer provided on at least one surface of the polyolefin base material, the coating layer comprising inorganic particles, and the electrolyte containing ether nitrile, butanedione, propionate and a lithium salt containing boron in specific amounts. By setting the total content of ether nitrile, butanedione and propionate in the electrolyte to a specific range, and setting the total content of butanedione and the lithium salt containing boron to a specific range, the present application inhibits the decomposition of ether nitrile and propionate, helps to form a stable coating film on the positive electrode surface, thereby not only improving the heat resistance of the separator, but also significantly improving the safety performance and vibration resistance of the secondary battery.

This invention discloses a photolithographically patternable lithium-ion electrolyte, its preparation method, and its applications. The electrolyte is a photolithographically curable lithium-ion electrolyte composition, comprising, by mass percentage, LiTFSI, polyethylene glycol methyl ether methacrylate, bisphenol A ethyl oxide dimethacrylate, fluoroethylene carbonate, succinic acid, 2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP), 3-(isobutyryloxy)propyltrimethoxysilane, and 2-methyl-2-acrylate-2-hydroxyethyl. This invention also discloses a stepwise preparation method for this composition and its applications in micro-energy storage and ion-electronic devices such as micro solid-state batteries, ion-controlled transistors, and neuromorphic devices. This electrolyte can be patterned at the micro-nano scale using standard photolithography processes, exhibiting excellent lithium-ion conductivity, electrochemical stability, mechanical flexibility, and optical transparency. It also shows good interface compatibility with gold electrodes / silicon wafers, requiring no additional etching or transfer processes. This solves the technical problems of existing solid-state electrolytes being difficult to fabricate at the micro-nano scale and incompatible with microelectronic processes, and has broad application prospects in the fields of micro-nano fabrication and micro-devices.

The invention discloses a nitrilase mutant and application thereof in synthesis of a gamma-aminobutyric acid derivative, the nitrilase mutant with improved catalytic activity and stereoselectivity is constructed to efficiently catalyze hydrolysis of 2-substituted succinonitrile to synthesize 3-substituted-3-cyanopropionic acid, and the gamma-aminobutyric acid derivative is further synthesized through hydrogenation. And a foundation is laid for industrial production of gamma-aminobutyric acid drugs synthesized by a nitrilase method.

The present disclosure provides a solid electrolyte material capable of suppressing a decrease in ion conductivity. The solid electrolyte material is characterized by containing a polymer electrolyte, an inorganic filler, and butanedinitrile, and the polymer electrolyte contains an anionic polymer.

The application discloses a kind of etching liquid in the field of etching liquid, by weight, containing hydrogen fluoride 6-9%, butanedinitrile 5-8%, ethanol 15-20%, and the balance is ultrapure water.The complexation reaction of butanedinitrile and hydrofluoric acid can be prevented in the application, and the hydrolysis of hydrofluoric acid is prevented.The complex can be gradually dissociated by temperature control, so that the effective concentration of hydrofluoric acid in the solution can be maintained, and there is no need to frequently supplement hydrofluoric acid into the solution or constantly prepare new hydrofluoric acid solution, and there is no need to use other surfactants.The etching liquid has the advantages of long-acting, stable and low cost, and can be used in the etching processing of vehicle-grade silicon nitride chip.

A solid electrolyte material capable of suppressing a decrease in ionic conductivity is provided. The solid electrolyte material includes a polymer electrolyte, an inorganic filler, and succinonitrile, wherein the polymer electrolyte includes an anionic polymer.

The invention discloses a kind of application of core-shell catalyst in 1,4-succinonitrile selective hydrogenation reduction reaction, belong to the technical field of polymer hydrogenation preparation, the catalyst is prepared by adding Raney nickel to the precursor solution of molecular sieve I to prepare core-shell catalyst 1, core-shell catalyst 1 is added to the precursor solution of molecular sieve II as a carrier to form, Raney nickel is evenly distributed in the molecular sieve internal framework, while the molecular sieve added by secondary addition is used to make the structure of catalyst 1 more stable, using 500-600 DEG C of high temperature roasting, the binding force inside the molecule is gradually increased at high temperature, the framework inside the molecular sieve is contracted to a certain extent, the catalyst prepared is more stable, not easy to deactivate during the reaction, and is provided to react better catalytic activity. The catalyst structure of the present invention is stable, and catalytic activity is high, and the high selectivity of 1,4-succinonitrile hydrogenation can be achieved, and the yield of obtained 1,4-butylene diamine is significantly increased.

Provided in the present application are a secondary battery and an electronic device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte solution. The positive electrode sheet comprises a composite current collector and a positive electrode material layer provided on at least one surface of the composite current collector. The positive electrode material layer comprises a lithium nickel cobalt manganese oxide compound. On the basis of the total molar amount of metal elements other than lithium, the molar percentage content of nickel in the lithium nickel cobalt manganese oxide compound is X, wherein X>80%. The electrolyte solution comprises adiponitrile and succinonitrile. On the basis of the mass of the electrolyte, the mass percentage content of adiponitrile is B1, and the mass percentage content of succinonitrile is B2, wherein 0.01≤X×B1 / B2≤90. The present application can improve the capacity retention ratio and lithium ion acceptance of a secondary battery after a high- or low-temperature impact test.

A secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode active material layer and an inorganic coating are provided on a surface of the positive electrode current collector. The electrolyte includes an additive, and the additive includes at least one of lithium difluorophosphate, succinonitrile, adiponitrile, 1,3,6-hexanetricarbonitrile, or 1,2,3-tris(2-oxyethoxy)propane. A mass per unit area of the inorganic coating is A g / m2, and based on a mass of the electrolyte, a mass percentage of the additive is B %, satisfying 0.01≤B / A≤5. Selection of the foregoing additives and control of B / A within the foregoing range are conducive to improving high-temperature safety performance of the secondary battery at high voltage.