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65 results about "Ion transport number" patented technology
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Ion transport number, also called the transference number, is the fraction of the total electrical current carried in an electrolyte by a given ionic species i, tᵢ=Iᵢ/Iₜₒₜ Differences in transport number arise from differences in electrical mobility. For example, in a solution of sodium chloride, less than half of the current is carried by the positively charged sodium ions (cations) and more than half is carried by the negatively charged chloride ions (anions) because the chloride ions are able to move faster, i.e., chloride ions have higher mobility than sodium ions.
Metal-organic frame material based composite battery diaphragm and preparation method and application thereof
InactiveCN108807798AAvoid direct contactAvoid short circuitFuel and secondary cellsNon-aqueous electrolyte accumulatorsPorosityIon transport number
The invention discloses a metal-organic frame material based composite battery diaphragm and a preparation method and application thereof. The preparation method comprises the following steps: (1), synthesizing a metal-organic frame material precursor; (2), compounding the metal-organic frame material precursor and a two-dimensional material or a polymer material to obtain the metal-organic framematerial based composite battery diaphragm. The diaphragm is high in porosity and large in specific surface area, the electrolyte wettability of the diaphragm can be improved, and the ion transport number of the diaphragm is greatly increased; the diaphragm has the advantage of an adjustable pore size, and through a suitable pore size, shuttling of electrolyte ions can be effectively controlled, occurrence of adverse side reactions can be inhibited, the battery capacity can be increased and the cycle life can be prolonged; through a uniform pore structure, the passing ions can be uniformly dispersed on the surface of an electrode, so that growth of dendrites are fundamentally inhibited, the cycle life of a battery is effectively prolonged, and the safety performance of the battery is improved; the metal-organic frame material based composite battery diaphragm has good flexibility and mechanical properties and can be applied to assembly of a practical soft pack battery.
Owner:NANJING UNIV
Battery diaphragm with high-temperature-resistant metal-organic frame material coating, and preparation method and application thereof
ActiveCN109461873AAvoid direct contactAvoid short circuitFuel and primary cellsFuel and secondary cellsPorosityState of art
The invention discloses a battery diaphragm with high-temperature-resistant metal-organic frame material coating, and a preparation method and application thereof. The battery diaphragm takes a commercial diaphragm as the substrate, and the single surface or double surface is coated with the metal-organic frame material. Compared with the prior art, the battery diaphragm disclosed by the inventionhas the following advantages: the metal-organic frame material coating is high in porosity and large in specific area, and the electrolyte wetting property of the diaphragm can be improved; the metalorganic frame material coating can effectively improve the heat-insulating property of the diaphragm, and improve the safety performance of the battery in the high-temperature environment; the metal-organic frame material coating can effectively control the shuttle of the electrolyte ion, improve the ion transport number, restrain the bad and side effect, improve the battery capacity, and prolongthe circulating life; the uniform duct structure enables the lithium ions to be uniformly deposited / peeled, thereby fundamentally restraining the growth of the lithium dendrites; the battery diaphragm disclosed by the invention has good flexibility and mechanical performance, and can be used for assembling a practical soft-package battery.
Owner:NANJING UNIV
Preparation method and application of single ion conductor nano-particle reinforced lithium battery diaphragm or polymer electrolyte
The invention belongs to the technical field of a lithium battery diaphragm, and in particular relates to a nanometer single ion conductor coated lithium battery diaphragm and a preparation method thereof. The lithium battery diaphragm adopts a porous polymer membrane or a non-woven fabric as a base material, and adopts single ion conductor nano-particles and polymers for modifying the surface of the base material. The prepared high-performance low-temperature lithium battery diaphragm is 5-100 microns in thickness, is 1-1000s / 100cc in air permeability, is 30-85% in porosity, is 0.02-8 microns in a pore diameter range, and is 100-800% in electrolyte absorptivity. The coated diaphragm has the good low temperature performance, high ionic migration number and ionic conductivity, and good rate capability and long cycle performance, and can improve the stability of an interface with positive and negative materials; and besides, the preparation process is simple and easy to operate, and low in production cost, and the mass production is easy to realize.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Preparation for self-crosslinking compound solid electrolyte and all-solid lithium ion battery composed of self-crosslinking compound solid electrolyte
ActiveCN108899579AReduce crystallinityImprove ionic conductivitySolid electrolytesFinal product manufactureSolid state electrolyteIon transport number
The invention relates to preparation for a self-crosslinking compound solid electrolyte and an all-solid lithium ion battery composed of the self-crosslinking compound solid electrolyte and relates tothe field of the electrolyte of the lithium ion battery. Specifically, a compound solid electrolyte is prepared according to the following steps: adopting silane terminated polyether (MS) as a prepolymer and then stirring and uniformly mixing with inorganic nano-particles with acidity and alkalinity or organic polymer materials, conductive lithium salt and organic solvents, and preparing the compound solid electrolyte through the self-crosslinking curing of MS and inorganic nano-particles with acidity and alkalinity or organic polymer materials. The self-crosslinking compound curing of MS andinorganic nano-particles with acidity and alkalinity or organic polymer materials is capable of reducing the degree of crystallinity of the compound solid electrolyte, promoting the ionic conductivity, ion transference number, mechanical properties, electrochemical stability window and battery rate charge-discharge properties of the compound solid electrolyte and solving the problem of interfacecontact of the solid lithium ion battery. The ionic conductivity can reach up to 10<-4>Scm<-1>, the electrochemical window is above 5V, the shrinking rate of the product is low and the electrochemicalstability is high.
Owner:BEIJING UNIV OF TECH
Process for producing fluorine containing polymer
According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided.A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit;—(CR1R2—CFX)—X means halogen atom except fluorine atom,R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.
Owner:PIOTREK
A montmorillonite-based composite solid electrolyte and a solid-state lithium battery
ActiveCN109244534AHigh room temperature ionic conductivityExcellent charge and discharge characteristicsSolid electrolytesSecondary cellsElectrical conductorIon transport number
The invention discloses a montmorillonite-based composite solid electrolyte and a solid-state lithium battery. The montmorillonite-based composite solid electrolyte comprises a lithium montmorilloniteinorganic single-ion conductor, a polymer with lithium ion transport ability, a lithium salt, a high-voltage-resistant organic additive and polytetrafluoroethylene with high adhesion property, The montmorillonite-based composite solid electrolyte takes lithium montmorillonite inorganic single ionic conductor as an electrolyte matrix, and the lithium montmorillonite inorganic single ionic conductor has high ion migration number, wide voltage window and high thermal stability. The montmorillonite-based composite solid electrolyte has high room temperature ionic conductivity () 10-4S cm-1), widevoltage window (4.2-5.5 V) and high ion migration numb () 0.5. That solid-state lithium battery assembled by the montmorillonite composite solid electrolyte of the invention has excellent cycle stability.
Owner:UNIV OF SCI & TECH BEIJING
Lithium single ionic conductive microporous electrolyte membrane and preparation method thereof
ActiveCN104183869AEasy to prepareImprove stabilitySolid electrolytesElectrolyte accumulators manufactureIon contentIon transport number
The invention discloses a lithium single ionic conductive microporous electrolyte membrane. The lithium single ionic conductive microporous electrolyte membrane is prepared from the following raw material components: a macromolecular material containing sulfonic acid or an amide sulphonate group, a water-soluble polymer and a macromolecular additive, wherein the macromolecular material containing sulfonic acid or the amide sulphonate group, the water-soluble polymer and the macromolecular additive respectively account for 25-95%, 5-75% and 0-40% of the weight of the total raw material components in percentage by weight. The lithium single ionic conductive microporous electrolyte membrane is simple in preparation method and can be electroconductive in a carbonate ester solvent without adding lithium salt; lithium ion content, hole ratio and hole size are adjusted by virtue of a reasonable formula, lithium ion transference number is close to 1, electrical conductivity at room temperature is excellent and stable, and the electrical conductivities at room temperature in different carbonate ester solvents can be more than 1*10<-3>S / cm; operating temperature ranges from -40 DEG C to 80 DEG C, and the electrical conductivity of the lithium single ionic conductive microporous electrolyte membrane at the temperature of minus 20 DEG C is still close to 1*10<-3>S / cm.
Owner:江苏明魁高分子材料技术有限公司
Boron-containing gel polymer electrolyte and preparation method and application thereof
ActiveCN106432608AImprove mechanical propertiesIncrease dissociationSecondary cellsElectrolyte immobilisation/gelificationIon transport numberPolymer science
The invention belongs to the technical field of polymer electrolytes, and particularly relates to a boron-containing gel polymer electrolyte and a preparation method and application thereof. The gel polymer electrolyte is prepared from lithium salt, an organic solvent, a photoinitiator, boron-containing heterocyclic photosensitive monomers and acrylate monomers in a copolymerization mode. The preparation method of the gel polymer electrolyte includes the steps that a compound containing boric acid groups and an alkene compound with a diol structure are esterified to obtain boron-containing heterocyclic alkene monomers, and the boron-containing heterocyclic alkene monomers, the acrylate monomers, the photoinitiator, the lithium salt and the organic solvent are uniformly dispersed; a mould containing the mixed solution is irradiated by an LED lamp for surface photo-initiated polymerization, and the boron-containing gel polymer electrolyte is obtained. The boron-containing gel polymer electrolyte has high ionic conductivity and a high cationic transference number, effectively solves the problems of liquid leakage, corrosion, poor mechanical performance and the like of a liquid electrolyte in traditional lithium-ion batteries and can be applied to preparation of supercapacitors, lithium-ion batteries, hybrid supercapacitors and the like.
Owner:FUDAN UNIV
All-solid-state polymer electrolyte and preparation method and application thereof
InactiveCN105098232ALower dissociation energyLow lattice energyHybrid capacitor electrolytesFinal product manufactureIon transport numberElectrochemical window
The invention provides all-solid-state polymer electrolyte. The electrolyte is a mixture of a fluorine-containing sulfonyl imide ion polymer and an ether oxo-containing polymer, wherein the mixture contains an -SO2N<->SO2- superacid polyanion structure; relatively high ionic conductivity and ion transference number can be obtained without adding a solvent; and meanwhile, an electrochemical window which is greater than 6V is obtained. An all-solid-state lithium secondary battery employing an electrolyte membrane can be charged and discharged at above 60 DEG C. Therefore, the all-solid-state polymer electrolyte has a wide application prospect in the fields such as a lithium-sulfur battery system, a high-voltage lithium battery system, a super capacitor and a high-temperature fuel cell.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
PAMPSLi fiber based polymer electrolyte membrane preparation method utilizing electrospinning method
ActiveCN102255106ALarge specific surface areaImprove liquid absorption capacityFinal product manufactureFilament/thread formingFiberPolymer science
A PAMPSLi (poly-vinylacetate-methyl methacrylate acid lithium) fiber based polymer electrolyte membrane preparation method utilizing an electrospinning method. The method belongs to the field of preparation of polymer electrolyte for polymer lithium ion battery. The invention mainly solves problems of concentration polarization phenomenon and low ion transport number in a salt polymer electrolytesystem. The PAMPSLi fiber based polymer electrolyte of the invention is prepared by employing a polymer electrolyte PAMPSLi as a polymer matrix and a lithium ion source to eliminate the concentrationpolarization phenomenon effectively, and the prepared membrane has a submicron pore structure, large specific surface area and high imbibition rate. In addition, a dual solvent system is employed to prepare a spinning liquid, so that shape and dimension of fiber can be controlled by adjusting the dual solvent composition. The PAMPSLi fiber based single ion polymer electrolyte has a conductivity reaching 2.12*10<-5>S / cm at room temperature, good electrochemical stability and an electrochemical window reaching 4.4V vs Li, so as to satisfy application requirements of a lithium ion battery. The preparation technology of the invention is simple, does not require a large consumption of solvents, has little environmental pollution, and is suitable for industrialized scale production.
Owner:HARBIN INST OF TECH
Preparation and application of block polymer electrolyte
InactiveCN108878967AImprove mechanical propertiesImprove thermal stabilityFinal product manufactureElectrolyte accumulators manufacturePolymer scienceIon transport number
The invention discloses preparation and application of a block polymer electrolyte and relates to the technical field of electrolytes for lithium-ion batteries. Block polymerization is carried out through a chemical method to prepare the block polymer electrolyte with different soft-hard segment ratios. A rigid isocyanate group molecular chain compound is built to improve the mechanical property and the thermal stability of the block polymer electrolyte as a skeleton and to provide certain ion channels; and a flexible hydroxyl group molecular chain compound is capable of improving the ion conductivity and the ion migration number of the polymer electrolyte to improve the charge-discharge performance of a solid-state lithium-ion battery as a main ion channel of the block polymer electrolyte, and is also capable of improving the interface property of the solid-state lithium-ion battery. The block polymer electrolyte has the advantages of high interface stability, a wide electrochemical window, a wide operating temperature range and high room-temperature ion conductivity; and a product is small in shrinkage rate, diverse in shape and suitable for a lithium-ion polymer battery.
Owner:BEIJING UNIV OF TECH
Preparation method of interpenetrating network structure p(liamps)-based single ion transport gel polymer electrolyte film
InactiveCN102276860AIncrease the number of transfersGood dimensional stabilityCell component detailsCross-linkMethacrylate
The invention relates to a preparation method of a gel polymer dielectric film by conveying an interpenetrating network structure P (LiAMPS) single ion, which belongs to a preparation method of polymer electrolyte films. The present invention solves the problems of low transport numbers and dimension stability of the present gel polymer electrolyte ions. The invention employs 2-acrylamide-2-methyl propanesulfonic acid lithium (LiAMPS) and vinyltriethoxysilane free radical polymerization to obtain a linear polymer P (LiAMPS-co-VTES), P (LiAMPS-co-VTES) containing an ethoxy functional group enables hydrolysis and polycondensation to form a net structure, simultaneously a cross-linking agent monomer polyethylene glycol dimethyl methacrylate is performed a free radical polymerization to form another net structure. The invention is capable of raising the dimension stability of the polymer electrolyte. Through heat weightlessness analysis, the polymer electrolyte films have good heat stability, the initial weightless temperature of the films is more than 200 DEG C, so that the requirement of lithium ion battery can be satisfied.
Owner:HARBIN INST OF TECH
Boron-containing solid polymer electrolyte and preparation method and application thereof
InactiveCN106229547AHigh lithium ion transfer numberIncrease dissociationHybrid capacitor electrolytesSecondary cellsPolymer scienceIon transport number
The invention belongs to the technical field of an electrolyte material, especially a boron-containing solid polymer electrolyte and a preparation method and application thereof. The polymer electrolyte provided by the invention comprises high molecular polymer matrix and electrolyte salt. The preparation method comprises the steps of esterifying boric acid-containing compounds and alkene compounds with diol structures, thereby obtaining boron heterocycle-containing vinyl monomer, uniformly dispersing the boron heterocycle containing vinyl monomer, initiator, the electrolyte salt and organic solvent, carrying out free radical polymerization, and drying obtained mixture, thereby obtaining the boron-containing solid polymer electrolyte. The boron-containing solid polymer electrolyte has the advantages of high ion conductivity, high cation transference number, good mechanical property and excellent electrode / electrolyte interface interaction and can be applied to fields such as a supercapacitor, a lithium ion battery, a hybrid supercapacitor and a fuel battery. The supercapacitor assembled with the polymer electrolyte has the advantages of wide electrochemical window, long cycle life and high security.
Owner:FUDAN UNIV
PVDF-HFP base composite porous polymer membrane and preparation method thereof
InactiveCN101260216AIncrease the amount of participationHigh mechanical strengthCell component detailsPolymer scienceIon transport number
A PVDF-HFP group composite porous polymer membrane and a preparation method thereof relate to a composite porous polymer membrane and a preparation method thereof, and solve the problems that the prior PVDF-HFP group composite porous polymer membrane has poor interface compatibility, smaller transference number of ions, easy agglomeration of ultrafine powder filler and limited adding amount. The product is made from PVDF-HFP, sodium hexametaphosphate and ultrafine powder filler. The preparation method is as follows: (1) PVDF-HFP is dissolved in organic solvent; (2) sodium hexametaphosphate, ultrafine powder filler and distilled water are mixed and stirred; (3) the mixed solution obtained by step (2) is dripped into the mixed solution obtained by step (1) and then is evenly stirred, thereby obtaining the product through molding and drying forming. The dosage of the ultrafine powder filler occupies more than 41.7 percent of the total weight of raw materials and is evenly dispersed in the polymer matrix; meanwhile, the polymer electrolyte membrane has reinforced mechanical strength, high interface performance and excellent processability; moreover, the product has high conductivity with the transference number of ion Li+ reaching 0.85 and the electrochemical stability window as high as 5.8V.
Owner:HARBIN INST OF TECH
Organic-inorganic composite electrolyte with three-dimensional bicontinuous conductive phase and preparation method thereof, and application of organic-inorganic composite electrolyte with a three-dimensional bicontinuous conductive phase
InactiveCN110112460AIncrease the number of transfersImprove stabilityFinal product manufactureElectrolytesComposite electrolyteIon transport number
The invention relates to a battery technology, in particular to an organic-inorganic composite electrolyte with a three-dimensional bicontinuous conductive phase and preparation method thereof, and application of an organic-inorganic composite electrolyte with a three-dimensional bicontinuous conductive phase. The organic-inorganic composite electrolyte comprises a sulfide electrolyte skeleton having a three-dimensional structure and a polymer filled in the three-dimensional structure. The structure allows lithium ions to have a bicontinuous transmission channel, compared to a common mode of filling inorganic substances into polymers, the structure allows the lithium ions to have a long-range and continuous rapid transmission channel so as to improve the conductivity and the ion mobility of the composite electrolyte. The organic-inorganic composite electrolyte with a three-dimensional bicontinuous conductive phase has the ion conductivity of 2*10<-4>-1*10<-3> Scm<-1>, has the transference number of ions up to 0.6-0.7, and has the electrochemical window higher than 4.6V vs. L1+ / Li. The structure enhances the deformation resistance of the sulfide electrolyte.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Lithium ion battery electrolyte and lithium ion battery
InactiveCN103066324AOvercome the disadvantage of narrow operating temperature rangeImprove conductivitySecondary cellsIon transport numberHigh rate
The invention discloses a lithium ion battery electrolyte and a lithium ion battery. The electrolyte comprises 60-85 parts by mass of an ionic liquid, 10-50 parts by mass of a carbonate solvent and 0-10 parts by mass of a phosphate fire retardant, and the concentration of a lithium salt in the electrolyte is 0.1-1.5mol / L. The lithium ion battery electrolyte overcomes the wide use temperature range disadvantage of a traditional organic solvent as a lithium ion battery electrolyte, and has the advantages of high conductivity, high ion transference number, high rate charge and discharge specific capacity, stable electrochemical properties during the use at a high temperature, and good fire retardation property.
Owner:WUHU EVERSHINE AUTOMOTIVE COMPONENT
Three-arm branched polymerized ionic liquid gel electrolyte and preparation method thereof
ActiveCN107579277AEasy to processGood size controlSecondary cellsFuel cellsIon transport numberLithium sulfur
The invention discloses three-arm branched polymerized ionic liquid gel electrolyte and a preparation method thereof. The preparation method comprises the following steps: enabling trimethylolpropaneto react with 2-bromine isobutyryl so as to prepare a three-arm macroinitiator; performing atom transfer free radical polymerization on methacrylic acid dimethylamino ethyl ester with the three-arm macroinitiator so as to prepare a three-arm branched polymer; performing an N-alkylation reaction and ion exchange on the three-arm branched polymer with halogenated hydrocarbon or halogenated quaternary ammonium salt so as to obtain a three-arm branched polymerized ionic liquid; compounding the three-arm branched polymerized ionic liquid with different lithium salts and ionic liquids, and performing a solution casting method, so as to obtain the polymerized ionic liquid gel electrolyte. The polymerized ionic liquid gel electrolyte is relatively high in ionic conductivity and ion transference number and relatively wide in electrochemical window and can be applied to fields such as lithium batteries, lithium sulfur batteries and lithium air batteries.
Owner:NANJING UNIV OF SCI & TECH
Solid oxide fuel cell
InactiveUS7033690B1Decrease in total electric conductivity can be preventedImprove conductivitySolid electrolytesFinal product manufactureFuel cellsElectrolysis
The objective of the present invention is to provide a solid oxide fuel cell which has an improved efficiency with a solid electrolyte layer having an improved ionic conductivity, while maintaining the partition wall function; In order to attain this object, the present invention provides a solid oxide fuel cell comprising an air electrode layer, a fuel electrode layer, and a solid electrolyte layer interposed between said air electrode layer and said fuel electrode layer, wherein said solid electrolyte layer comprises a first electrolyte layer which is made of a lanthanide-gallate oxide and has a first ionic transference number and a first total electric conductivity, and a second electrolyte layer which is made of a lanthanide-gallate oxide and has a second ionic transference number smaller than said first ionic transference number and a second total electric conductivity larger than said first total electric conductivity; said air electrode layer is laminated onto one side of said solid electrolyte layer; and said fuel electrode layer is laminated onto the other side of said solid electrolyte layer.
Owner:MITSUBISHI MATERIALS CORP
Thin film electrolyte for thin film batteries
The invention relates to a solid-state lithium-ion thin- film electrolyte that, compared to the current state-of-the-art thin-film electrolyte, Lipon, exhibits an equal or larger electrochemical stability window (0-5.5 V vs. Li+ / Li), an equal or smaller electronic conductivity (10-14 S / cm at 25 DEG C), the same ideal transference number for Li+ions (t =1.000), and a 10x higher Li+ion conductivity at -400C. Latter provides thin- film batteries (TFBs) with at least a 5x higher power performance at -400C over the current state- of-the-art Lipon TFBs.
Owner:SAPURAST RES
Organic/inorganic composite electrolyte membrane for solid-state sodium ion battery, preparation and application thereof
ActiveCN111628213AGuaranteed uptimeImprove ionic conductivitySecondary cellsElectrolytesComposite electrolyteIon transport number
The invention provides an organic / inorganic composite electrolyte membrane for a solid-state sodium ion battery, preparation and application of the organic / inorganic composite electrolyte membrane, wherein a flexible organic / inorganic composite porous membrane is prepared by utilizing high mechanical strength of an inorganic ceramic and high elasticity and interfacial compatibility of a polymer. According to the invention, a porous base membrane is soaked in a polymer precursor solution containing a sodium salt, and the polymer precursor solution is cured in situ in the pore channels of the porous base membrane by means of photo-initiation or thermal initiation; and the composite electrolyte membrane prepared by the invention has high ionic conductivity, excellent mechanical properties andhigh ion mobility, shows stable battery operation at a high temperature (60 DEG C), and has a wide application prospect.
Owner:HUNAN AGRICULTURAL UNIV
A preparing method of a perfluorosulfonic acid-carboxylic acid composite membrane by multilayer solution tape casting
The invention relates to a preparing method of a perfluorosulfonic acid-carboxylic acid composite membrane by multilayer solution tape casting. The method includes: preparing a perfluorosulfonic acid resin solution and a perfluorocarboxylic acid resin solution respectively, and repeating multi-time tape casting on a steel belt tape casting machine. The preparing method is characterized in that: the composite membrane prepared by solution multi-time tape casting is high in interlayer adhesion strength, and anti-stripping performance of an ion membrane is good. Blistering and stripping of composite membranes prepared by traditional lamination methods, which are caused by large stress generated by a large difference between ion transference numbers of two base membranes and imbalance water permeation amounts of the two base membranes in an electrolytic process, are avoided, so that the service lifetime of the composite membrane is prolonged. The preparing method is high in process automation degree, simple and convenient in operation, high in process controllability, stable in product quality and capable of achieving large-scale production.
Owner:BEIJING UNIV OF CHEM TECH
Memory Diodes
InactiveUS20130234098A1Digital storageBulk negative resistance effect devicesElectrical conductorIon transport number
A memory cell (32C), including a first non-insulator (34C) and a second non-insulator (40C), different from the first non-insulator. The second non-insulator forms a junction (46C) with the first non-insulator. The cell further includes a first electrode (48C) which is connected to the first non-insulator and a second electrode (50C) which is connected to the second non-insulator. At least one of the first and second non-insulators is chosen from a group consisting of a solid electrolyte and a mixed ionic electronic conductor and has an ionic transference number less than 1 and greater than or equal to 0.5.
Owner:TECHNION RES & DEV FOUND LTD
Electrochemical simplified model of lithium ion battery and parameter acquisition method thereof
ActiveCN110442901AImprove applicabilityHigh precisionElectrical testingSpecial data processing applicationsIon transport numberInternal resistance
The invention discloses an electrochemical simplified model of a lithium ion battery and a parameter acquisition method thereof, and relates to a mechanism model of the lithium ion battery. The electrochemical simplified model of the lithium ion battery is as follows: Uapp is terminal voltage of the lithium ion battery; Up and Un are positive and negative open-circuit potentials; t is time, and t+ is a cation migration number; ysurf and xsurf are the concentrations of lithium ions on the solid-phase surfaces of the positive electrode and the negative electrode; R is an ideal gas constant; f is a Faraday constant; t is the working temperature of the lithium ion battery; c0 is the initial lithium ion concentration in the electrolyte; mp and mn are intermediate variables and have no specificphysical significance; [delta]c1 and [delta]c2 are the change amounts of the lithium ion concentrations at the positive and negative current collectors relative to the initial lithium ion concentration c0 in the electrolyte; Rohm is the equivalent ohmic internal resistance of the lithium ion battery; I is an external current, and it is stipulated that discharge is positive and charge is negative.According to the invention, accurate simulation of batteries made of different lithium cobalt oxide materials at 4C multiplying power and below terminal voltage can be realized.
Owner:HARBIN INST OF TECH AT WEIHAI
Electrolyte and lithium metal battery
ActiveCN107732294AImprove securityGrowth inhibitionLi-accumulatorsSecondary cells servicing/maintenanceSolid state electrolyteIon transport number
The invention provides an electrolyte. The electrolyte comprises modified inorganic oxide particles, a crosslinking agent, a lithium salt and a non-aqueous solvent, wherein the modified inorganic oxide particles and the non-aqueous solvent are combined and gathered together by the crosslinking agent. By the modified inorganic oxide particles, the viscosity of the liquid-state electrolyte can be improved, the mobility of a solution is reduced, the mechanical strength of a semi-solid state is improved, and a semi-solid state or quasi-solid state electrolyte is formed; meanwhile, by a synergisticeffect of the crosslinking agent and the modified inorganic oxide particles, high mechanical modulus blocking is achieved, various dendrites can be prevented from growing, so that lithium dendrites are effectively prevented, the safety of the prepared lithium metal battery is improved, the ion transfer number is increased, and the electrical conductivity is further improved; and an experimental result shows that the safety of the prepared lithium metal battery is relatively high and is not lower than 305h within short time, the electrical conductivity of the prepared lithium metal battery isrelatively high, and the ion transfer number is not lower than 0.25.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Solid electrolyte and preparation method and application thereof
ActiveCN112397772AHigh mechanical strengthImprove conductivitySolid electrolytesLi-accumulatorsSolid state electrolyteMetallic lithium
The invention relates to a solid electrolyte as well as a preparation method and application thereof, and mainly solves the problems of low mechanical strength and low conductivity of the existing solid electrolyte and the problems of complexity, long time consumption and difficulty in large-scale production of the existing solid electrolyte preparation method. According to the solid-state electrolyte, nanoparticles grow on a substrate skeleton, and then the electrolyte is fixed, so that the interface contact between metal lithium and the electrolyte is effectively improved, the ionic conductivity and the ionic migration number are improved, the uniform deposition and separation of lithium ions on the metal lithium are promoted, and the solid-state electrolyte can be widely applied to solid-state batteries.
Owner:宁德国泰华荣新材料有限公司
Nanometer material-modified rubber-gel electrolyte film and preparation method and application
InactiveCN109326821AImprove liquid absorption capacityImprove securityMaterial nanotechnologySolid electrolytesIon transport numberNew energy
The invention discloses a preparation method of a nanometer material-modified rubber-gel electrolyte and application of the nanometer material-modified rubber-gel electrolyte, and belongs to the technical field of new energy materials. Nanometer material-modified rubber-gel electrolyte film is prepared from a nanometer material, rubber and an organic electrolyte; the weight percentage of the nanometer material is 10-40wt%, the weight percentage of the rubber is 20-50wt%, and the weight percentage of the organic electrolyte is 3-60wt%. The nanometer material-modified rubber-gel electrolyte is simple in preparation method route, mild in operation condition, environmentally friendly in preparation process, good in stability, good in metal interface compatibility, and large and stable in deformation space, and energy storage device short circuits and dendritic crystals can be effectively prevented; more importantly, due to outstanding organic electrolyte adsorption capability of the nanometer material modified rubber-gel electrolyte, the ionic conductivity and a transference number of ions are well improved.
Owner:XIANGTAN UNIV
Device for determining migration number of hydrogen ions (H<+>) through interface method and method for determining migration number of H<+>
InactiveCN102664131AImprove accuracyReasonable test methodMaterial analysis by electric/magnetic meansMass spectrometersIon transport numberHemt circuits
Owner:SHANGHAI UNIV
Gel containing ester compound and sulfide as well as preparation and application of gel
ActiveCN112510250AImprove ionic conductivityHigh ion transfer numberFinal product manufactureLi-accumulatorsIon transport numberPhysical chemistry
The invention relates to gel containing ester compounds and sulfides as well as preparation and application of the gel, and belongs to the technical field of gel electrolytes. The gel is prepared from, by mass, 50%-80% of ester compounds, 2%-40% of salt compounds, 2%-45% of sulfur and 1%-20% of metal sulfide, the room-temperature ionic conductivity of the gel is 1.0*10<2> S / cm or above, the room-temperature ionic migration number of the gel is 0.6 or above, and the gel further has a wide electrochemical window. The electrolyte can be applied to a secondary ion battery; the preparation method of the gel is simple, short in preparation period and easy for industrial production.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Biomass nanofiber diaphragm as well as preparation method and application thereof
ActiveCN109980166AImprove compactnessImprove ionic conductivitySecondary cellsCell component detailsPorosityFiber
The invention discloses a biomass nanofiber diaphragm as well as a preparation method and application thereof. The biomass nanofiber diaphragm comprises a biomass nanofiber diaphragm layer with a compact structure, and the biomass nanofiber diaphragm is prepared from biomass nanofibers chemically modified with cyano groups. According to the biomass nanofiber diaphragm, due to the modification of the cyano groups, the surface of the biomass nanofiber diaphragm can be combined with a liquid electrolyte to form a gel state, and lithium ions can be transmitted through the gel state, so that the transmission of the lithium ions does not depend on the aperture of the diaphragm. The biomass nanofiber diaphragm provided by the invention is high in compactness, high in ionic conductivity, high in electrolyte wettability and high in ion mobility. According to the diaphragm, the complicated step that the biomass nanofiber diaphragm needs a pore forming process to achieve high porosity and to improve the lithium ion conductivity of the diaphragm can be avoided, the biomass nanofiber diaphragm provided by the invention has high mechanical properties, and the produced biomass nanofiber diaphragmhas the advantages of compactness and excellent electrochemical performance and the like.
Owner:UNIV OF SCI & TECH OF CHINA
An in-situ polymerized polycaprolactone-based all-solid-state electrolyte and its preparation method and application
ActiveCN111430791BReduce crystallinityDisrupt the regularity of the arrangementSolid electrolytesSecondary cellsSolid state electrolyteIon transport number
The invention discloses an in-situ polymerized polycaprolactone-based all-solid electrolyte as well as a preparation method and application thereof. The method comprises: adding lithium salt and inorganic additive particles into methoxy polycaprolactone acrylate to obtain a mixed liquid; adding a photoinitiator into the mixed liquid and mixing evenly to obtain a mixture; under an inert atmosphere, coating the mixture Covering on the pole piece, the in-situ polymerization reaction is carried out under the irradiation of ultraviolet light to obtain the in-situ polymerization polycaprolactone-based all-solid-state electrolyte. The branched structure of the all-solid-state electrolyte of the present invention and its combination with polymer material particles make it have high mechanical strength, high ion conductivity, high ion transfer number and wide electrochemical window, and has a certain biological Degradability. The all-solid-state electrolyte of the present invention uses an in-situ polymerization preparation method. The precursor is directly coated on the pole piece, and the solid-state electrolyte is obtained by free radical polymerization under ultraviolet light triggering. The process conditions are simple, efficient and convenient, and there is no solvation and no pollution to the environment.
Owner:SOUTH CHINA UNIV OF TECH
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