100 results about "Ionic conductance" patented technology

An organic electrolyte battery that through inhibition of any oxidative decomposition of organic electrolyte under high voltage, attains an enhancement of cycle characteristics and is further capable of attaining a realization of high energy density.

There is provided organic electrolyte battery (10) comprising positive electrode material (2) and negative electrode material (4) and, interposed therebetween, organic electrolyte (6), wherein positive electrode active material particles (8) as a constituent of the positive electrode have surfaces at least partially coated with attachment (12) with electronic conductance and ionic conductance not easily oxidized even when supplied with oxygen from the positive electrode active material. The above attachment (12) is composed of microparticles of inorganic solid electrolyte with ionic conductance (14) and microparticles of conductive material with electronic conductance (16). In a polymer lithium secondary battery, the microparticles of inorganic solid electrolyte consist of any one of lithium-containing phosphates, silicates, borates, sulfates, aluminates, etc., or a mixture thereof.

The invention relates to an ionic liquid precursor and a mesoporous material for supporting the ionic liquid precursor, synthesis and application. A preparation method comprises the following steps of: 1) synthesizing the ionic liquid precursor; 2) synthesizing the mesoporous material for supporting the ionic liquid precursor; and 3) acidizing or alkalifying the synthesized mesoporous material for supporting the ionic liquid precursor according to the requirements so as to obtain a target product. The loading capacity of the mesoporous material for supporting the ionic liquid precursor is relatively adjusted, and a mesoporous material for supporting functionalized ionic liquid can be obtained by further acidizing or alkalifying the material according to the requirements. The amount, strength of acid and alkali, properties, variety and the like of ionic liquid supported on the material are adjustable, so that the material can meet the demand of application such as various acid and alkaline catalytic reactions, chemical adsorption and separation and the like. By the material, the using amount of the ionic liquid is greatly reduced, the better catalytic effect is achieved when the material is applied to aldol condensation reactions, and the recycling of a catalyst can be realized. The kind of material is expected to be used for catalyzing more chemical reactions, and may be applied in the fields of adsorption, separation, ionic conductance and the like.

A preparation method for lithium titanate and graphene composite electrode materials comprises the following steps: solution A containing lithium ion is prepared by dissolving surface-active agent, template agent and lithium compound into deionized water; titanium compound is added into graphene solution with the concentration of 0.1 to 0.5 g/l, and solution B containing titanium ions is prepared through ultrasound and stirring; under the effect of ultrasonic wave field, the solution A is added into the solution B, then bonding agent is added, and solution C is prepared; the solution C is moved into a polytetrafluoroethylene reaction kettle, and reaction is performed under 140 to 200 DEG C; then leaching, washing and drying to the solution are performed, and eventually, composite products are produced under the atmosphere of argon gas. The lithium titanate in the composite product is nanosheet lithium titanate, can be fully mixed and contacted with the sheet graphene, and the electric conductance and ion electric conductance of the lithium titanate material are improved greatly; and the composite product is classified as electrode material with excellent and high rate charge-discharge performance.

The invention relates to a solid electrolyte for inhibiting lithium dendrites growth in a full-solid-state battery, and a preparation method thereof. The solid electrolyte is prepared from lithium-lanthanum-zirconium oxide ceramic and 0.1 to 10 weight percent of low-melting-point sintering aid. The preparation method comprises the following steps of dry grinding and uniformly mixing stoichiometric lithium carbonate, lanthanum oxide and zirconium oxide, and then presintering in a muffle furnace at the temperature of 900 DEG C to form a phase; adding the low-melting-point sintering aid into presintering powder, and dry grinding and mixing to obtain a manual pressed sheet sample; densifying during a further high-temperature sintering process to form the solid electrolyte with high ionic conductance, stable performance and high repeatability. Compared with the prior art, without influencing a conductive property of a lithium-contained garnet lithium ion, a low-cost second phase is used so that the conductive property of the lithium ion at a crystal boundary part is improved, the solid electrolyte can better realize lithium ion transmission and plays a role in inhibiting the lithium dendrites growth in the full-solid-state battery, and the safety of the lithium battery is improved.

The invention discloses a poly-N-vinyl-N'-alkyl-imidazole ionic liquid structure material, which possesses general structure on the right, wherein R is C2-C16 alkyl; X is negative ion; n and m is chain segment number with and without ionized group; the scale of the rate of n and n+m is 0.1:1-1:1, which is adjusted by the molar rate of reactant; the polymer molecular quantity scale is (0.1-100)*104g/mol.

The invention provides a crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for a fuel cell, and a preparation method thereof, which belong to the fields of high polymer chemistry and anion-exchange membrane fuel cells. A structural formula of the anion-exchange membrane is as shown in a formula I. The invention also provides the preparation method of the crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for the fuel cell. The method comprises the steps of firstly preparing polyether-ether-ketone; then carrying out bromination substitution reaction on methyl on the polyether-ether-ketone, and obtaining brominated polyether-ether-ketone; adding 1-methylimidazole and 1-vinyl imidazole into a brominated polyether-ether-ketone solution, and obtaining a mixed solution; finally pouring the mixed solution onto a glass plate, drying, and obtaining a paved membrane which is the crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for the fuel cell. The anion-exchange membrane provided by the invention has high ionic conductance, high alkali resistance, higher mechanical performance and higher relative selectivity; the preparation method provided by the invention is simple and low in cost.

A method of producing a thin film of an inorganic solid electrolyte having a relatively high ionic conductance is provided. In the method, a thin film made of an inorganic solid electrolyte is formed, by a vapor deposition method, on a base member being heated. The thin film obtained through the heat treatment exhibits an ionic conductance higher than that of the thin film formed on the base member not being heated. The ionic conductance can also be increased through the steps of forming the thin film made of the inorganic solid electrolyte on the base member at room temperature or a temperature lower than 40 DEG C. and then heating the thin film of the inorganic solid electrolyte.

The invention discloses a preparation method of a polymer-added composite cathode and application of the composite cathode in a solid-state battery. The composite cathode is characterized by comprising a composite cathode pole piece and a solid-state electrolyte material, wherein the composite cathode pole piece is prepared from a cathode active material, an additive, a conductive agent and a binder; the solid-state electrolyte material is prepared from a high-molecular polymer with a long chain segment, lithium salt conducting a coordination reaction with the high-molecular polymer, and a fast ion conductor. The invention also discloses a preparation method of the polymer-added composite cathode applied to a solid-state lithium battery. The preparation method is characterized by comprising the following steps: preparing a cathode pole piece, preparing a solid-state electrolyte membrane. The preparation method disclosed by the invention has the following advantages: the arrangement regularity of polyoxyethylene molecular chains is damaged by the effect among the molecular chains of several polymers, the glass-transition temperature is lowered, the crystal formation is inhibited, and the ionic conductance is enhanced.

The present invention provides for the detection of biochemical analytes by measuring variations in ionic conductance resulting from the hybridization of a biological analyte (e.g. oligonucleotides) with a capturing element immobilized on a membrane substrate having nano-sized pores.

The invention provides a nonaqueous electrolytic solution for a lithium ion secondary battery. The nonaqueous electrolytic solution comprises a nonaqueous solvent, a lithium salt and an additive, wherein the additive is a composition of cyclic sultone and oxalyl lithium difluoroborate. The invention also provides a method for preparing the nonaqueous electrolytic solution for the lithium ion secondary battery. The solution has the advantages that the nonaqueous electrolytic solution has obviously improved effect, low cost and simple process, is applicable to practical application, and can improve the cycling performance by over 50 percent. On the other hand, as the nonaqueous electrolytic solution is not required to form more electrolytic solution, the characteristics of the prior electrolytic solution can not be affected, such as high ionic conductance, high energy and low capacity decline. The nonaqueous electrolytic solution is both applicable to a cylindrical cell, a button cell, and a computer battery, a mobile phone battery, a battery of a vehicle using motor, a solar cell and the like.

A device for interrupting or throttling undesired ionic transport through a fluid network is disclosed. The device acts as a fluid valve by reversibly generating a fixed "bubble" in the conducting solvent solution carried by the network. The device comprises a porous hydrophobic structure filling a portion of a connecting channel within the network and optionally incorporates flow restrictor elements at either end of the porous structure that function as pressure isolation barriers, and a fluid reservoir connected to the region of the channel containing the porous structure. Also included is a pressure pump connected to the fluid reservoir. The device operates by causing the pump to vary the hydraulic pressure to a quantity of solvent solution held within the reservoir and porous structure. At high pressures, most or all of the pores of the structure are filled with conducting liquid so the ionic conductance is high. At lower pressures, only a fraction of the pores are filled with liquid, so ionic conductivity is lower. Below a threshold pressure, the porous structure contains only vapor, so there is no liquid conduction path. The device therefore effectively throttles ionic transport through the porous structure and acts as a "conductance valve" or "pressure-to-conductance" transducer within the network.

The invention relates to a B-site omission perovskite anode material used for a solid oxide fuel cell, belonging to the fuel cell field. The invention is characterized in that: an A site of perovskite SrTiO3 is adulteration of Y (8 mole percent); Ti omission exists on a B site; molecular formula after omission adulteration is Y0.08Sr0.92Ti1-xO3-delta, wherein, x is equal to 0 to 0.05; a transition element for A-site adulteration is yttrium. The omission adulteration anode material prepared by the invention can be used for the solid oxide fuel cell and has stable performance and good chemical compatibility with electrolyte YSZ and LSGM, and ionic conductivity of the material is greatly improved. Compared with data of a material Y0.08Sr0.92TiO3-delta which has no omission adulteration, the ionic conductivity is raised by two order of magnitudes, thereby working performance of the anode material is improved and foundation is laid for practicality of the SOFC.

The invention discloses a high-ionic conductance full-solid-state composite cathode piece, a battery comprising the same and a preparation method. The preparation method of the full-solid-state composite cathode piece comprises the following steps: 1. preparation of a high-ionic conduction composite cathode active material CNT@Li2S: successfully coating the CNT with the active cathode material Li2S, and preparing a nano-scale composite cathode material CNT@Li2S by adopting a mechanical chemical method; and 2. preparation of a high-ionic conduction composite cathode piece: mixing the high-ionic conduction composite cathode active material CNT@Li2S, a conductive agent and a binder with an organic solvent, dispersing, and fully stirring, to obtain cathode slurry; by taking aluminum foil as a current collector of the cathode piece, coating the cathode slurry to obtain the high-ionic conduction composite cathode piece. Through the full-solid-state battery provided by the invention, the difficulties that a carbon nanotube is easily clustered, the cycle performance is unstable, and the active cathode materials are unevenly distributed, and the like can be effectively solved.

The invention discloses a method for preparing a long chain branch polyphyenyl ether anionic membrane, and belongs to the technical field of membranes. According to the membrane material, a long chain branch with a certain toughness is introduced into polyphenyl ether used as a main chain by acylation, condensation reaction and bromination and is ionized to prepare a novel alkaline anionic exchange membrane. In the preparing process, the long chain branch is introduced, so that the membrane has excellent alkali resistance, relatively high ionic conductance and excellent size stability, and can be used as an anionic exchange membrane material for alkaline fuel cells.

The invention discloses a preparation method of a heterogeneous anion exchange membrane. The preparation method of the heterogeneous anion exchange membrane comprises the following steps of: preparing aggregated monomer size, and soaking a porous film into the aggregated monomer size; forming a membrane polymer by thermal-initiated polymerization; and preparing the anion exchange membrane by ammonium after hydrolyzing in an alkaline solution. The heterogeneous anion exchange membrane is simple in preparation method, and low in cost, and does not pollute the environment; and the prepared membrane has high ion exchange capacity, high ionic conductance, small membrane thickness, and wide application prospect in the aspect of an alkaline fuel cell.

The invention discloses a crosslinked heterocyclic polyarylether alkaline electrolyte membrane and a preparation method thereof, belonging to the technical cross fields of high molecular materials and membranes. The preparation method comprises the following steps of: introducing an activated halogen atom to prepare halogenated heterocyclic polyarylether through a chloromethylation or halogenated acylation reaction; then, performing a quaternization crosslinking reaction by using a composite quaternization agent, and forming a membrane; and finally, transferring the solution into an alkaline solution to carry out a quaternization reaction to obtain the crosslinked heterocyclic polyarylether alkaline electrolyte membrane. The alkaline membrane prepared by using the method has high chemical stability, mechanical stability ad thermal stability, high ionic conductance and extensive application in the fields of alkaline fuel cells and related electrochemical devices.

The invention belongs to the field of polymer electrolytes, and discloses a polymer electrolyte with a flame retardant function and preparation and application thereof. The polymer electrolyte comprises a metal salt and a cross-linked polymer formed by taking hexaphenol amino cyclophosphazene as an inner core and polyethylene glycol diglycidyl ether as a cross-linking arm, wherein the chemical structural formula of the cross-linked polymer is shown in the description, and n is an integer ranging between 4 and 113. By improving the key structure and composition of the polymer electrolyte and the overall process design of the corresponding preparation method, the polymer electrolyte which can be applied to metal ion batteries such as lithium-ion batteries and has the flame retardant functionis obtained. Compared with the prior art, the safety problems such as low ionic conductivity, poor mechanical performance and easy combustion and explosion of the polymer electrolyte can be effectively solved.

The invention provides a Li-ion conductive oxide ceramic material with a garnet type crystal structure or a crystal structure similar to a garnet type, and internal resistance component in a crystalline grain has high contribution on ionic conductance. The Li-ion conductive oxide ceramic material with a garnet type crystal structure or a crystal structure similar to a garnet type contains Li, La, Zr, and O, and also contains more than one element selected from rare earth elements.

Characters of the invention are that materials of solid electrolyte Li : Al : S=1 :1 :2 (at mol ratio) are amorphous material. Aluminum sulphide is as framework of providing transmission space for lithium ion so as to obtain higher ionic conductivity (ionic conductivity in room temperature about 1.77*10-5S/cm), lower electron conductivity (electron conductivity in room temperature less than 1.0*10-8S /cm), lower activation energy of material, and wider thermostable range. The invention provides comparative ideal candidate of electrolyte material for practical lithium ion battery in full solid state.

The invention relates to the field of lithium ion batteries, and specifically relates to a solid electrolyte and a preparation method thereof, and a lithium ion battery. The solid electrolyte is of acore-shell structure; the core-shell structure comprises a core material and a shell material coated outside the core material; and the core material has a perovskite structure, and the shell materialcontains Li3+yY2SiyP3-yO12, wherein y is greater than or equal to 0.05 but less than or equal to 0.5. The invention further relates to the preparation method of the solid electrolyte. The invention further relates to the lithium iron battery, and the lithium ion battery includes a positive electrode, a negative electrode, and the solid electrolyte disposed between the positive electrode and the negative electrode. The solid electrolyte provided by the invention has a wide electrochemical window and a relatively high ionic conductivity, and has a wide application.

The invention discloses a preparation method of a double-layer surface-coated high-nickel ternary single-crystal positive electrode material. The method comprises the following steps: sequentially and sufficiently mixing a lithium source, an aluminum source, a phosphorus source, a titanium source or a germanium source with a high-nickel ternary single-crystal positive electrode material step by step under a solvent-free condition, wherein the lithium source, the aluminum source, the phosphorus source, the titanium source or the germanium source have mutual reactivity; and sintering at low temperature to obtain a high-nickel ternary single crystal material coated with an LISICON type solid electrolyte and with stability and ionic conductivity, and treating the high-nickel ternary single crystal material with a silane coupling agent to form a hydrophobic layer on the surface of the high-nickel ternary single crystal material. The sintering temperature of the LISICON type solid electrolyte can be greatly reduced by utilizing the chemical reaction activity among the raw materials, and the process and environment problems caused by organic solvent coating are effectively improved; and the double-layer coating structure can effectively improve the circulation and rate performance of the high-nickel ternary single-crystal positive electrode material, and reduce the requirement of the high-nickel ternary single-crystal positive electrode material on environment humidity.