243results about How to "Increase the number of transfers" patented technology

An iontophoresis device useful for administering an ionic drug by iontophoresis has an iontophoresis electrode section (active electrode section) and a ground electrode section (inactive electrode section) both of which are to be connected to a power source. The iontophoresis device includes elements (members) of both of the electrode sections are all formed of membrane bodies, and includes ion exchange membranes different in ion selectivity, one being selective to ions of the same species as charged ions of the ionic drug and the other to ions different in species from the charged ions of the ionic drug that are arranged in the iontophoresis electrode section, and at least an ion exchange membrane selective to ions opposite to the charged ions of the ionic drug is arranged in the ground electrode section. The iontophoresis device can administer the ionic drug stably over a long period of time at high transport efficiency.

The invention discloses a composite gel polymer electrolyte membrane and application thereof. The composite gel polymer electrolyte membrane is prepared by adding core-shell ordered mesoporous silica composite particles into a conventional gel polymer electrolyte system, wherein the adding mass of the core-shell ordered mesoporous silica composite particles is 5 to 30 percent based on the mass ofa polymer matrix in the conventional gel polymer electrolyte system; the core-shell ordered mesoporous silica composite particles take ordered mesoporous silica particles as cores; a polymer is grafted and coated on the outside surfaces of the ordered mesoporous silica particles to form shells; and the shell polymer has good compatibility with the polymer matrix in the conventional gel polymer electrolyte system. The composite gel polymer electrolyte membrane prepared in the invention has higher room-temperature ionic conduction capacity, simultaneously has better mechanical strength and heatresistance, and is suitable for polymer lithium ion batteries.

The invention discloses a lithium single ion conduction polymer electrolyte based on functionalized lithium borate. A double-bond-containing functionalized lithium borate and a sulfydryl-containing compound are subjected to an alkene-sulfydryl click reaction, or the double-bond-containing functionalized lithium borate and the sulfydryl-containing compound and a double-bond-containing polyether are subjected to a poly-alkene-sulfydryl click reaction to prepare a linear or network-shaped all-solid-state or gel catalyst. The lithium single ion conduction polymer electrolyte prepared by the invention has the advantages of simple and easily implemented synthesis, low-cost and easily available raw materials, high room-temperature conductivity, high lithium ion mobility, wide electrochemical window, and the like; and a lithium battery assembled by the electrolyte provided by the invention has high safety, high rate capability, long cycle life and stability.

The invention belongs to the field of polymer materials and batteries and particularly relates to a water-soluble polymer material gel polymer electrolyte and a preparation method thereof, and the invention also relates to the application of the gel polymer electrolyte in a primary or secondary electrochemical energy storage system. The gel polymer electrolyte is composed of a polymer film and a liquid electrolyte. The invention relates to the preparation method of the gel polymer electrolyte, and the method has a simple preparation process and low cost, and the preparation process is environment-friendly. The prepared gel polymer electrolyte has the advantages of high conductivity, wide electrochemical window, high lithium-ion migration number and good compatibility with electrode materials, the growth of metal dendrites can be effectively inhibited, and the cycle stability and rate performance of a battery and a capacitor can be significantly improved. The gel polymer electrolyte canbe used in the primary or secondary electrochemical energy storage system with high energy density, large capacity and high safety.

The invention provides ion liquid composed of fluoroalkyl sulfimide salt alkali metal salt containing 'S-fluoroalkyl sulfimide group', fluoroalkyl sulfimide negative ions containing 'S-fluoroalkyl sulfimide group' and positive ions of sulfonium salt, ammonium salt and microcosmic salt. The ion liquid utilizes (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine with sulfur valence state as +4 and hydroxylamine oxygen sulfonic acid to react to prepare intermediate fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide, effectively shortens the line that the (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine is utilized to prepare fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide through the three steps of chlorination, fluorination and amination, and is convenient to operate and high in yield and purity. The alkali metal salt has good heat stability and hydrolysis resistance, has high conductivity and oxidation potential in traditional carbonic ester solution, and is good in compatibility with electrode materials widely used. The ion liquid can be applied to lithium ion batteries and carbon-based super capacitors.

The invention provides electrolyte solution, which contains an organic solvent, a lithium salt or lithium oxide, a compound containing an electron-withdrawing group and an additive, wherein the solvent is a carbonic ester and/or ether solvent; and the additive is a compound having a molecular formula of RBC2O4Li, R in the formula may be -C2O4, -F2, -C6H2O2, alkyl or fluorine-containing substitutedalkyl, and the concentration of the additive in the electrolyte solution is 0.005 to 0.1mol/l. The invention also provides a preparation method of the electrolyte solution. The invention also provides a lithium cell, which comprises a lithium cell diaphragm soaked in the electrolyte solution. The electrolyte solution of the invention has the advantages of high transport number of lithium ions, high conductivity and wide electrochemical window. Meanwhile, the electrolyte solution has high compatibility with a carbon cathode material.

The invention discloses a quasi-solid electrolyte which is prepared from the following raw materials including a polymer, a ceramic electrolyte, lithium salt and ionic liquid; the polymer is preparedfrom polyvinylidene fluoride-hexafluoropropylene and polypropylene carbonate; the ceramic electrolyte is prepared from a principal-phase lithium titanium aluminum phosphate and impurity-phase TiP2O7/TiO2; and the ionic liquid is fluorine-containing imidazolium ionic liquid. The invention also discloses the quasi-solid electrolyte which has high mechanical strength and toughness, high room-temperature lithium ion conductivity and high chemical/electrochemical stability with a metal lithium negative electrode and an oxide positive electrode, is used for a metal lithium cell, a lithium air cell and a lithium-sulfur battery and can realize good electrochemical performance.

The invention discloses a composite polymer electrolyte and a preparation method and application thereof and relates to electrolytes. The composite polymer electrolyte comprises a polymer matrix and a boron-containing inorganic oxide. The preparation method of the composite polymer electrolyte includes a direct addition method and an in-situ polymerization method, wherein the direct addition method includes the steps of dissolving and dispersing the polymer matrix and the boron-containing inorganic oxide into a solvent to obtain a solution A, applying the solution A on the polymer matrix, volatilizing the solvent, and immersing an obtained polymer film into an electrolyte solution so as to obtain the composite polymer electrolyte; the in-situ polymerization method includes the steps of dissolving and dispersing the polymer matrix and the boron-containing inorganic oxide into a solvent, adding an initiator, feeding N2 to eliminate air, conducting a polymerization reaction to obtain a solution B, applying the solution B on the polymer matrix, volatilizing the solvent, and immersing an obtained polymer film into an electrolyte solution so as to obtain the composite polymer electrolyte. The composite polymer electrolyte can be applied to preparation of batteries.

The invention discloses a novel solid-state electrolyte membrane material capable of being used as a lithium ion battery as well as a preparation method and application thereof. The material is a segmented copolymer containing a polyfluorosulfimide based lithium salt and a polyethylene oxide structure and the molecular structure is shown in the formula (I). The method comprises the following steps: mixing a fluorine-containing monomer and polyethylene oxide and dissolving into dry acetonitrile; adding an acid-binding agent and reacting at 0-100 DEG C for 1-10 days to obtain a polymer in a form of metal ion salt; dissolving the polymer in the metal ion salt form into an organic solvent; and adding LizX to carry out a lithium ion exchange reaction to obtain a polymer in a lithium salt form. The material can be used as a battery solid electrolyte material to be applied to preparation of the lithium ion battery. The material is used as solid electrolyte and has a better application prospect in terms of inhibiting the growth of lithium dendrites in the lithium ion battery, improving the transference number of lithium ions and ensuring high conductivity at room temperature and stable battery circulation.

The invention discloses a quasi-solid state lithium ion conductive electrolyte. The raw material comprises a polymer, a ceramic electrolyte, a lithium salt and an ionic liquid, wherein the polymer comprises polyvinylidene fluoride-hexafluoropropylene and polypropylene carbonate, the ceramic electrolyte comprises a main phase lanthanum-lithium-zirconium-oxygen and an impurity phase La2Zr2O7, and the ionic liquid is a fluorine-containing imidazolium ionic liquid. The invention discloses the quasi-solid state lithium ion conductive electrolyte. The quasi-solid state lithium ion conductive electrolyte has high mechanical strength, is compatible with flexibility, has high room-temperature lithium ion conductivity and high chemical/electrochemical stability with a metal lithium negative electrode and an oxide positive electrode, and favorable electrochemical performance can be achieved when the quasi-solid state lithium ion conductive electrolyte is used for a metal lithium battery, a lithium-air battery and a lithium-sulfur battery.

The invention provides a modified SiO2 nanoparticle, a preparation method thereof, a nanofiber membrane containing the modified SiO2 nanoparticle, a gel electrolyte and a lithium metal battery. The modified SiO2 nanoparticle comprises an SiO2 nanoparticle and a specific ionic liquid grafted on the SiO2 nanoparticle. The nanofiber membrane is composed of a vinylidene fluoride-hexafluoropropylene copolymer and fiber consisting of the modified SiO2 nanoparticle. The gel electrolyte comprises the nanofiber membrane and a plasticizer adsorbed inside the nanofiber membrane. An electrolyte of the lithium metal battery is the gel electrolyte. According to the modified SiO2 nanoparticle provided by the invention, the mutual effect of the nanofiber membrane and the plasticizer can be strengthened, the transference number of Li+ is increased, the modified SiO2 nanoparticle is matched with the structure of the nanofiber membrane, and the ionic conductivity and specific capacity of the gel electrolyte and the cycling stability under high rate can be further improved.

The present invention relates to electrochemical storage devices containing a non-aqueous lithium based electrolyte with high ionic conductivity, low impedance, and high thermal stability. More particularly, this invention relates to the design, synthesis and application of novel fluorinated arylboron oxalate based compounds which act as anion receptors and/or additives for non-aqueous batteries. When used as an anion receptor for non-aqueous battery electrolytes, the fluorinated arylboron oxalate enhances conductivity, lithium ion transference number and Solid Electrolyte Interface (SEI) formation capability during the formation cycling.

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.

The invention relates to the technical field of battery preparation, in particular to a full-solid-state electrolyte material, a preparation method and application thereof. The full-solid-state electrolyte material is filled with polyethylene glycol and a lithium salt in pore passages of a porous organic frame material. The preparation method comprises the following steps: dissolving polyethyleneglycol and the lithium salt into a solvent, mixing with the porous organic frame material uniformly, and removing the solvent to obtain the full-solid-state electrolyte material. According to the full-solid-state electrolyte material, abundant oxygen sites are arranged on the chain of the material by using the chain polymer such as polyethylene glycol, the material can react with lithium ions effectively, the transport of lithium ions in the pore passages of the porous material is promoted by using the oscillation of the material, and lithium exists in the pore passages of the porous materialin the form of lithium ions, so that the conductivity and transport number of the obtained electrolyte material are improved, the material can serve as a diaphragm material of lithium ion batteries, and the material is high in safety and high in stability at high temperature.

The invention provides a preparation method of crosslinked polymer electrolyte, a semisolid polymer battery and a preparation method thereof. A cyclic borate with alkenyl groups at two terminals is used as a crosslinker; a polymer monomer and the like are subjected to in-situ polymerization on a support material to obtain the crosslinked polymer electrolyte. The preparation method of the crosslinked polymer electrolyte is simple; the prepared polymer electrolyte has small resistance and good compatibility with electrodes, and has good mechanical properties and high electrical conductivity andtransport number; a polymer battery electrolyte assembly with the polymer electrolyte has good stability and rate performance.

Disclosed are a preparation method and an application of a boron nitride/polyoxyethylene composite solid electrolyte. (1) Acetonitrile is added into nanometer boron nitride, and ultrasonic cleaning iscarried out to obtain a boron nitride-acetonitrile dispersing liquid, and then polyoxyethylene PEO is added and stirred into uniform emulsion; (2) LiTFSI is added into the emulsion and is stirred into a uniform mixed solution; and (3) the mixed solution is poured into a polytetrafluoroethylene mold, and passes through a ventilation and evaporation drying box, and then a prepared polymer solid electrolyte is cut into circular pieces to be applied to a solid lithium metal battery, wherein the binder adopted in the solid lithium metal battery is polyoxyethylene PEO. The mechanical property of the polymer solid electrolyte is improved, and the lithium ion transport number is increased; and in the assembling process of the solid lithium metal battery, the problems of drying and liquid leakageof an organic liquid battery are effectively avoided, and high electrochemical cycling stability and safety are kept.

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 single-ion conductor polymer lithium salt and a preparation method thereof. The single-ion conductor polymer lithium salt is prepared by simple free radical polymerization of astyrene disulfonic imide lithium salt monomer and maleic anhydride. Firstly, p-styrene sulfonyl chloride and benzene sulfonamide generates styrene disulfonic imide under triethylamine and 4-dimethylamino pyridine and are neutralized with lithium hydroxide to obtain the styrene disulfonic imide lithium salt monomer. Azodiisobutyronitrile is taken as an initiator, styrene disulfonic imide lithium and maleic anhydride are bonded together through a simple free radical copolymerization mode to form an alternating polymer of vinyl benzene sulfonylimide lithium salt and maleic anhydride. The single-ion conductor polymer lithium salt and the preparation method thereof have the advantages that a high dielectric constant unit of the maleic anhydride is introduced into an existing polymer lithium salt framework or chain segment, and is a pathway of effectively increasing the concentration of 'free' lithium ions, improving the conductivity and transference number of room-temperature lithium ionsthrough the interaction of the maleic anhydride with lithium ions and the promotion of the dissociation of the lithium ions.

A high-temperature resistant lithium ion electrolyte belongs to the technical field of a lithium battery electrolyte and comprises a lithium salt and an organic solvent and also comprises 1,2-bi(trimethylsilyl) ethylene, 1,3-dimethyl-1,1,3,3-tetraethylene disiloxane, 2,4,6-triethylene-2,4,6-trimethylcyclotrisiloxane or 1,3-divinyl-1,1,3,3-tetramethyl-disilazane. In the battery electrolyte, the charge-discharge performance of a lithium battery can be effectively improved due to addition of the substance into the electrolyte, side reaction is reduced, so that the battery bubbling is reduced, andthe cycle lifetime of the battery is prolonged.

The invention provides composite solid electrolyte and a solid-stage battery. The composite solid electrolyte contains an anionic ionic liquid polymer and inorganic solid electrolyte. A perfluorsulfimide ion with relatively weak coordination capacity is taken as an ionic center of the anionic ionic liquid polymer and has relatively small bonding capacity to Li<+>, so that the specific conductanceand Li<+> transference number of the composite solid electrolyte are increased; and the anionic ionic liquid polymer and the inorganic solid electrolyte can be composited in a relatively wide proportion range, so that the ionic conductivity and the mechanical property of the composite solid electrolyte can be further improved.

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 relates to the field of lithium ion batteries and especially relates to an all-solid-state polymer electrolyte containing high-concentration lithium salt and a preparation method thereof. The all-solid-state polymer electrolyte is made of the lithium salt and a polyvinylidene fluoride-hexafluoropropylene copolymer, and a content of the lithium salt is greater than 50wt.%. The preparation method comprises the following steps: (1) uniformly mixing the polyvinylidene fluoride-hexafluoropropylene copolymer, the lithium salt and a solvent to obtain a precursor solution; and (2) coating a clean and smooth substrate with the precursor solution, forming a film under a ventilation condition, and finally carrying out vacuum drying to obtain the all-solid-state polymer electrolyte. Theall-solid-state polymer electrolyte disclosed by the invention is simple to prepare, relatively low in cost, high in room-temperature ionic conductivity, high in electrochemical window and high in lithium ion transference number, and can be used as the electrolyte of a lithium ion battery.

The invention provides a cross-linked modified polyimide single-ion polymer. The cross-linked modified polyimide single-ion polymer has a chemical structure shown as formula (I). Polyimide and a 4-styrene sulfonyl(benzenesulfonyl)imide lithium salt are combined together by utilizing an enol click chemical reaction through ultraviolet curing, anions are better fixed on a polymer, and the transmission distance of lithium ions is shortened, so that the lithium ion transference number and the ionic conductivity of the polymer electrolyte prepared from the material are improved; meanwhile, pentaerythritol tetra(3-mercaptopropionate) (PETMP) can be connected with a plurality of lithium salt molecules, so that more lithium sources are provided; the transference number of electrolyte Li<+> can beincreased due to low lithium ion delocalization energy of lithium disulfimide of the 1, 4-styrene sulfonyl(benzenesulfonyl)imide lithium salt; a plasticizer with good thermal stability is also added to improve the ionic conductivity; and then, the thermal stability and ionic conductivity of the polymer gel electrolyte and the cycling stability of the battery are ensured, and the use safety of thelithium ion battery is ensured.