65 results about "Ion transport number" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.