38results about How to "Guaranteed ionic conductivity" patented technology

An energy storage device having both characteristics of super capacitor and lithium ion battery and manufacturing method thereof are provided. The invention adopts the mixture of anode material of lithium ion battery and electrode material of super capacitor or composite material as anode active substance, and uses the mixture of cathode material of the lithium ion battery and electrode material of the super capacitor or composite material as cathode active substance. In the electrode active substance, the electrode material of the lithium ion battery has a content of 20% to 95%; the electrode material of the super capacitor has a content of 5% to 80%. The electrode active substance is mixed with the bonder, conducting agent, additive and solvent etc to prepare slurry, then experience steps of coating, drying, roll forming, parting, so that the anode sheet and cathode sheet of the super capacitance battery are produced. By adopting multi-core winding parallel connection and the assembling technology of the winded wore parallel to the narrow arrangement, the anode sheet, the cathode sheet and the membrane are loaded in the battery shell and then welded, dried, dehydrated, and injected with electrolyte, then activated by electricity to obtain super capacitance battery with high energy density and high power density.

The invention discloses a porous lithium ion battery separator with an interpenetrating polymer network structure, and a preparation method and an application for the porous lithium ion battery separator. The preparation method specifically comprises the steps of uniformly mixing polyvinylidene fluoride-hexafluoropropylene, (methyl) acrylate monomers, octavinyl octa-silsesquioxane cross-linking agent and pore-forming auxiliary in a proper solvent to form porous gel polymer film with the interpenetrating polymer network structure through free radical polymerization, wherein the ion conductivity of the polymer film at a temperature of 25 DEG C can reach 1.0*10<-3>S/cm, the tensile strength can reach 7MPa, and excellent dimensional stability is realized; and on the basis, carrying out post processing on the gel polymer film to obtain the porous separator. By adoption of the lithium ion battery separator provided by the invention, the ionic conductivity can be greatly improved, and the high rate charging-discharging performance can be also obviously enhanced as well, so that the porous lithium ion battery separator is high in application potential.

The invention provides a repairable cross-linked solid polymer electrolyte as well as a preparation method and application thereof, and the repairable cross-linked solid polymer electrolyte is prepared by the following method: dispersing and dissolving terephthalaldehyde, bisphenol A diglycidyl ether, polyethylene glycol diamine and a lithium salt in an acetonitrile solvent, and carrying out stirring for 2-6 hours to obtain a transparent and uniform mixed solution A; dropwise adding the mixed solution A onto a polytetrafluoroethylene mold, and volatilizing acetonitrile at room temperature to obtain a sol-like substance B; and putting the sol-like substance B into a vacuum drying oven, carrying out polymerization reaction to completely crosslink and solidify the sol-like substance B, and continuously heating to dry the sol-like substance B to prepare the polymer electrolyte. According to the invention, a dynamic imine covalent bond is introduced into the polymer electrolyte to form thesolid network-shaped polymer electrolyte, so that the solid network-shaped polymer electrolyte can be repaired in time when fracture occurs in the use process; the prepared network-like polymer electrolyte has high thermal stability and dendritic-crystal-free morphology, and has excellent electrochemical properties such as ionic conductivity and lithium ion migration number.

The present invention provides an imidazole side chain type anion exchange membrane for fuel cells and a preparation method of the imidazole side chain type anion exchange membrane, and belongs to thefields of polymer chemistry and anion exchange membrane fuel cells. The anion exchange membrane is characterized in according to different monomer molar ratio: a molar ratio of a methyl hydroquinonemonomer to an allyl bisphenol S monomer is a:b (a and b are each an integer of 1-9, and a + b is 10). The present invention also provides the preparation method of the imidazole side chain type anionexchange membrane. The method uses a nucleophilic polycondensation reaction to conduct polymerizing according to different monomer molar ratios to form poly(aryl ether sulfone ketone) with different proportions containing the methyl hydroquinone monomer and allyl bisphenol S monomer so as to prepare the imidazole side chain type anion exchange membrane. The imidazole side chain type anion exchangemembrane has highest ion conductivity of 0.157 S/cm at a temperature of 80 DEG C.

The invention discloses a composite electrolyte and application thereof, the composite electrolyte comprises a gel electrolyte coated on a lithium negative electrode and a quasi-solid electrolyte coated on a positive electrode, and the gel electrolyte is in contact with the quasi-solid electrolyte; electrolyte is adsorbed in the quasi-solid electrolyte; both the gel electrolyte and the quasi-solidelectrolyte contain the same conductive lithium salt; the invention also discloses application of the composite electrolyte to a lithium ion battery. According to the invention, through cooperation of the two electrolytes, lithium dendrites are inhibited, and the composite electrolyte is ensured to have good conductivity.

The invention discloses a core-shell structure material and a preparation method and applications thereof. The core-shell structure material comprises a core containing elemental sulfur and a shell that coats the core. The shell comprises sulfur containing organic substances. The sulfur containing organic substances can react with selected substances to for an in-situ coating layer on the shell. The selected substances are selected from substances that can carry out nucleophilic reactions or electrophilic reactions with sulfur containing organic substances. The core-shell structure material can be used as the cathode material of a lithium-sulfur battery; moreover, the preparation technology is simple and convenient, the efficiency is high, the conditions are mild, the equipment is simple, and the material is suitable for large scale industrial application. The sulfur containing organic substances in the core-shell structure material can carry out chemical reactions with lithium sulfide electrolyte additives and generates an in-situ coating layer, which can inhibit the dissolution and shuttling of polysulfide ions. A lithium sulfur battery prepared from the core-shell structure material has a high discharge capacity and excellent cycling stability.

The invention discloses a lithium polyoxometallate composite diaphragm for a lithium battery and a preparation method of the diaphragm. The composite diaphragm comprises a PVDF-HFP copolymer, SiO2 and lithium polyoxometallate, wherein the lithium polyoxometallate has a three-dimensional skeleton structure, and lithium ions are combined with anions of lithium polyoxometallate; in the battery charging/discharging process, the lithium ions of the lithium polyoxometallate can be continuously exchanged with the lithium ions in electrolyte, the combination of the diaphragm material with the lithium ions in the electrolyte is realized, the internal resistance of the battery is reduced, and the rate characteristic of the battery is improved.

The invention provides a lithium battery negative plate loaded with a temperature-resistant composite layer and a preparation method. The lithium battery negative plate is prepared by spraying a turbid liquid B on the negative plate loaded with a porous conductive layer, and the turbid liquid B is prepared by adding an inorganic temperature-resistant material into a mixed solution; the negative plate loaded with the porous conductive layer is prepared by spraying a turbid liquid A on the negative plate, the turbid liquid A is prepared by adding an inorganic lithium ion conductor, polyoxyethylene and graphene oxide powder into a mixed solution, and the negative plate is prepared by mixing a negative active material, polyvinylidene fluoride and a conductive agent and coating a copper foil with the mixture, wherein the mixed solution is prepared by dissolving a polyvinylidene fluoride hexafluoropropylene copolymer in a mixed solvent of acetone and N, N-dimethylformamide. The lithium battery negative plate provided by the invention not only has good temperature resistance, but also has high ionic conductivity and good safety and usability, and meanwhile, the preparation process is simple and suitable for industrial production.

The invention provides a lithium ion battery and a preparation method thereof. The lithium ion battery comprises a positive electrode material, a negative electrode material and a polymer electrolyte, and the polymer electrolyte has a -NHLi structure on a contact surface with at least one of the positive electrode material and the negative electrode material. The polymer electrolyte of the lithium ion battery is formed by in-situ polymerization during battery formation. Therefore, a -NHLi structure is formed on the surface of the positive electrode material or/and the negative electrode material, so that effective conduction of lithium ions can be ensured, and the ionic conductivity and the lithium ion transference number are ensured. Meanwhile, the polymer has excellent elastic modulus and can maintain the stability of an interface, so that a stable lithium ion transmission channel and a stable lithium ion transmission interface are provided, and the cycle performance of the battery is improved.

The invention discloses an electricity-membrane coupled water treatment system with clean energy and a water treatment method. The system comprises a particle filtering module, an electrochemical degradation module, a nanofiltration separation module, a direct-current power supply and a solar power generation module. The outlet of the particle filtering module is connected to the electrochemical degradation module; the outlet of the electrochemical degradation module is connected to the nanofiltration separation module; concentrated water is returned to the electrochemical degradation module through the outlet of the nanofiltration separation module, and fresh water is discharged through the outlet. Any processing unit in the electrochemical degradation module comprises an anode and a cathode, the anode and the cathode are connected with a direct-current power supply through wires, and the direct-current power supply is connected with the solar power generation module. The anode is a gradient boron-doped diamond electrode. The provided treatment system has high chemical oxygen demand (COD) removal efficiency, high mineralization efficiency and high current utilization efficiency, and meanwhile, by introducing clean energy into the system structure, the overall energy consumption required in the water degradation process can be greatly reduced.

The invention provides a positive plate and application thereof. A first aspect of the invention provides a positive plate. The positive plate comprises a current collector and an active layer, and the active layer is arranged on the upper surface and/or the lower surface of the current collector. At least one active layer comprises functional particles, and the functional particles are oxides ofwhich the outer layers comprise -NH- or -NH2 groups. According to the positive plate provided by the invention, the active layer comprises the functional particles, and-NH-or-NH2 groups on the outer layers of the functional particles can adsorb acidic substances in the lithium ion battery and reduce the acid content in the lithium ion battery, so that consumption of lithium ions and corrosion of the acidic substances to a positive electrode material are avoided. Besides,-NH- or -NH2 groups on the outer layers of the functional particles have certain hydrophilicity, so that the wettability of the electrolyte can be effectively improved, lithium ion channels are increased, the liquid retention rate of the positive plate is increased, and the ionic conductivity between the positive plate andthe electrolyte is ensured, and therefore, the cycle performance and the safety performance of the lithium ion battery are improved.