81 results about "Quasi solid electrolyte" patented technology

The invention discloses a nanostructured quasi-solid electrolyte applied to lithium ion batteries or lithium sulfur batteries and a preparation method and application thereof. The nanostructured quasi-solid electrolyte is a macro solid-state electrolyte material which is formed by an inorganic-organic hybrid framework material adsorbing ion conductive agent. The preparation method of the nanostructured quasi-solid electrolyte is as follows: in protective atmosphere, the inorganic-organic hybrid framework material is soaked in the ion conductive agent and sufficiently mixed, and redundant solvent is then volatilized. The prepared nanostructured quasi-solid electrolyte with high lithium ion conductivity can be substituted for both organic electrolyte and diaphragms in conventional lithium ion batteries, and thereby safety problems caused by the leakage of the organic electrolyte can be effectively prevented; a lithium battery assembled from the electrolyte can use a metal lithium plate as a cathode.

A process for producing a separator-electrolyte layer for use in a lithium battery, comprising: (a) providing a porous separator; (b) providing a quasi-solid electrolyte containing a lithium salt dissolved in a first liquid solvent up to a first concentration no less than 3 M; and (c) coating or impregnating the separator with the electrolyte to obtain the separator-electrolyte layer with a final concentration ≧the first concentration so that the electrolyte exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a vapor pressure less than 60% of that of the first liquid solvent alone, a flash point at least 20 degrees Celsius higher than a flash point of the first liquid solvent alone, a flash point higher than 150° C., or no detectable flash point. A battery using such a separator-electrolyte is non-flammable and safe, has a long cycle life, high capacity, and high energy density.

A rechargeable lithium cell comprising a cathode, an anode, a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a mixture of a liquid solvent and a liquid additive having a salt concentration from 1.5 M to 5.0 M so that said electrolyte exhibits a vapor pressure less than 0.01 kPa, a vapor pressure less than 60% of the vapor pressure of the liquid solvent alone, a flash point at least 20 degrees Celsius higher than the flash point of the liquid solvent alone, a flash point higher than 150° C., or no flash point, wherein the liquid additive is selected from Hydrofluoro ether (HFE), Trifluoro propylene carbonate (FPC), Methyl nonafluorobutyl ether (MFE), Fluoroethylene carbonate (FEC), Tris(trimethylsilyl)phosphite (TTSPi), Triallyl phosphate (TAP), Ethylene sulfate (DTD), 1,3-propane sultone (PS), Propene sultone (PES), Diethyl carbonate (DEC), Alkylsiloxane (Si—O), Alkylsilane (Si—C), liquid oligomeric silaxane (—Si—O—Si—), Tetraethylene glycol dimethylether (TEGDME), or a combination thereof.

A separator-electrolyte layer product for use in a lithium battery, comprising: (a) a porous thin-film separator selected from a porous polymer film, a porous mat, fabric, or paper made of polymer or glass fibers, or a combination thereof, wherein the separator has a thickness less than 500 μm; and (b) a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a liquid solvent up to a concentration no less than 3 M; wherein the porous thin-film separator is coated with the quasi-solid electrolyte so that the layer product exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a vapor pressure less than 60% of the vapor pressure of the liquid solvent alone, a flash point at least 20 degrees Celsius higher than a flash point of the first liquid solvent alone, a flash point higher than 150° C., or no detectable flash point.

The invention relates to a lithium negative electrode protection film, a preparation method and a lithium metal secondary battery, belonging to the field of lithium metal secondary batteries. The lithium anode protective film is composed of lithium salt, ionic liquid, inorganic nanoparticles and lithium-treated Nafion polymer. Ionic liquids containing lithium salts are adsorbed on the surface of inorganic nanoparticles and uniformly dispersed in lithium-treated Nafion polymers. By arranging a mixed solution of lithium salts and ionic liquids; Mixing the mixed solution and the inorganic nanoparticles by sealed ball milling to obtain a quasi-solid electrolyte; The quasi-solid electrolyte is mixed with a lithium-treated Nafion polymer solution, coated on the surface of lithium or copper foil,and the protective film is prepared after the solvent is completely volatilized. As that lithium negative electrode protective film can inhibit the generation of lithium dendrite, the lithium negative electrode protective film has good mechanical properties and chemical stability, high lithium ionic conductivity and good film for performance; A lithium metal secondary battery provide with that lithium anode protective film has excellent electrochemical performance.

This invention discloses a dye-sensitized nano crystalline solar cell anode-film-manufacturing method, in which nano compound TiO2 powder is used as raw materials to deposit film on conductive glass by vacuum cold coating method and porous TiO2 film is formed through after treatment. The TiO2 film has channel structure with multiple sizes that is favourable to dye diffusing and adsorbing to interior of the film and the transferring of the electrolyte carrier in the film, especial for solid or quasi-solid electrolyte cell, the film is favourable to electrolyte diffusing into interior of the film.

The invention relates to an electrolyte of dye-sensitized solar cells, disclosing a quasi solid electrolyte and a preparation method thereof; the method in the invention comprises the following steps: (1) blending polymeric ionic liquid, nonpolymeric ionic liquid, ionic liquid cross linking agent and initiating agent according to the mass ratio of 15-60:20-80:2-10:1-5, and obtaining the polymer gel through random copolymerization at the temperature of 20-80 DEG C; and (2) immersing the polymer gel into iodic solution or iodic vapor for adsorption of iodic simple substance to obtain the electrolyte. In the invention, the well-prepared ionic liquid monomer/ionic liquid mixture is dipped between a light anode and a Pt electrode and quasi solid polymer gel is formed through in situ polymerization; the polymer gel is dipped into iodic solution or iodic vapor for the adsorption of iodic simple substance to prepare the quasi solid full-ionic liquid electrolyte which is used in solar cells, and the dye-sensitized solar cells are prepared simultaneously. The electrolyte prepared by the method has strong electrolytic adhesive ability and easy encapsulation, thus simplifying battery assembly program.

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 method for preparing a dye sensitized TiO2 nano crystal solar energy battery which is based on a customized micro structure conductive film. TiO2 blocking layer film which inhibits charge recombination, a customized micro structure TiO2 film, dye particles, a finishing coat, a liquid or quasi solid electrolyte and a metal negative electrode, wherein the dye particles are adsorbed on the customized micro structure TiO2 film, the TiO2 film has porosity, the shape of an interface of the film is a rectangle, the size of the structure is that the depth/ height is 200nm, the width is 100nm, the length is 100nm, and the depth to width ratio is equal or greater than 2.0. A die structure is transferred on the TiO2 film. The TiO2 film has a micro structure whose height is ordered, the TiO2 film has the advantages that the scattering of photons is capable of being increased, the absorption efficiency of light is increased, the probability of interface recombination is reduced and the like, thereby achieving the purpose of improving the transformation efficiency of DSSCs. The manufacture cost is low, the efficiency is high, and the invention has the advantages of big area preparation.

The invention discloses a composite electrode of a flexible dye-sensitized solar cell and a preparation method thereof. The composite electrode consists of a conducting polymer layer (3) on a conductive substrate and a quasi-solid electrolyte layer (4), wherein the conductive substrate is an ITO or FTO flexible plastic sheet, or ITO or FTO glass; the conducting polymer layer (3) is prepared from a conducting polymer, an organic solvent and carbon black, and the ratio of the conducting polymer to the organic solvent to the carbon black is 4.5 to 1 to 0.1; and the quasi-solid electrolyte layer (4) consists of the conducting polymer, the organic solvent, inorganic nano-powder and an ionic liquid, and the ratio of the conducting polymer to the organic solvent to the inorganic nano-powder to the ionic liquid is 4.5 to 1 to 0.24 to 0.04. The preparation method thereof comprises the steps of: preparing the conducting polymer layer on the conductive substrate, and performing heat treatment at the temperature of 80 DEG C; and finally, coating a layer of quasi-solid electrolyte on the conducting polymer layer to obtain the composite electode. The conducting polymer is 1.3 percent aqueous solution of PEDOT: PSS. The composite electrode has the advantages of simple preparation method and low cost, and is suitable for the application of the flexible dye-sensitized solar cells.

It is an objective of the invention to provide a quasi-solid state electrolyte that has a well-balanced combination of contact performance with electrode active materials, conductivity, and chemical and structural stability, each at a high level, and an all solid state lithium secondary battery using the quasi-solid state electrolyte. There is provided a quasi-solid state electrolyte comprising: metal oxide particles; and an ionic conductor, the ionic conductor being a mixture of either a glyme or DEME-TFSI and a lithium salt that includes LiFSI, and being carried by the metal oxide particles.

The invention relates to a LLZO preparation method, a thermal cell quasi-solid electrolyte, and a preparation method thereof. The preparation method of the quasi-solid electrolyte comprises followingsteps: raw materials including Li2CO3, La2O3, ZrO2, H2C2O4, and an alkali metal halide are subjected to purification treatment, the needed Li2CO3, La2O3, H2C2O4, and ZrO2 are weighed, are grinded to be uniform, and are introduced into a sealed stainless steel tank for roasting at 1200 DEG C, natural cooling is carried out, an obtained product is subjected to ball milling to be uniform so as to obtain the lithium lanthanum zirconium oxygen solid state electrolyte (Li7La3Zr2O12, LLZO); the LLZO and an alkali metal halide co-molten salt are mixed again, the temperature is increased to 400 to 500DEG C under protection of argon gas rapidly, repeat vacuum pumping and slow pressurizing are carried out so that infiltration of the co-molten salt into the porous LLZO is realized, natural cooling iscarried out, and an obtained product is subjected to ball milling so as to obtain the thermal cell quasi-solid electrolyte. The prepared thermal cell quasi-solid electrolyte is low in crystal boundary resistance, and high in ion mobility, and heat stability.

The invention relates to a quasi-solid electrolyte film applied to electrochromism as well as preparation and application thereof. A raw material mixed slurry comprises lithium perchlorate, a solvent, polyvinylidene fluoride and silicon dioxide. A preparation method of the quasi-solid electrolyte film comprises the following steps: carrying out vacuum drying on the lithium perchlorate to remove water, then preparing a lithium perchlorate solution, taking the polyvinylidene fluoride and the silicon dioxide to dissolve in the lithium perchlorate solution to prepare a slurry capable of being thermally pressed to form a film, taking a proper amount of the slurry, coating the slurry on a glass substrate, thermally pressing to form a film, cooling to room temperature to obtain the quasi-solid electrolyte film which is applied to electrochromic devices. The method is simple in preparation process and low in cost; the prepared quasi-solid electrolyte film is high in conductivity, can be applied to the electrochromic devices, is capable of effectively improving the electrochromism performance of the devices, can get rid of the limit that a polymer electrolyte film is difficult in large-area production, and can achieve the application prospect of industrialization of preparation of electrolyte films through a thermal pressing method.

The invention discloses a novel cathode protection device of buried pipeline, and belongs to the technical field of electric power. The method aims at analyzing defects existing in the aspect of long-distance pipeline of traditional cathode protection, innovation is carried out on the basis of sacrificial anode and current cathode protection technology, and the novel cathode protection device andmethod of the buried pipeline for the sacrificial anode and current cathode protection are researched and developed. The device comprises a power supply, a potentiostat, an auxiliary anode, a reference electrode, a cathode protection connection contact point and a quasi-solid electrolyte of the novel cathode combined protection device of the buried pipeline. The device is simple and convenient, solar power generation system is used as the cathode protection power supply, a cathode protection station and a laying cable do not need to be built, can be put into a field power-free cathode protection project at any time, so that engineering cost is reduced.

The invention relates to the field of batteries, and in particular to a self-repairing composite solid electrolyte, a quasi-solid electrolyte and a lithium battery. The self-repairing composite solidelectrolyte includes a self-healing polymer including a self-repairing group selected from carbamido, and an inorganic solid electrolyte. The dry basis of the self-repairing composite solid electrolyte can be bent, has flexibility and can inhibit the growth of lithium dendrites, the composite solid electrolyte has a self-repairing function and can prolong the service life of the battery, and little electrolyte containing lithium salt is added into the self-repairing composite solid electrolyte to prepare and obtain a quasi-solid electrolyte which can allow the electrolyte to have high electrical conductivity, can reduce the content of the liquid electrolyte containing the lithium salt and can improve the safety of the battery.

The invention relates to an ion liquid-based quasi-solid electrolyte for a lithium battery and a preparation method of the quasi-solid electrolyte, and belongs to the technical field of a lithium secondary battery. The quasi-solid electrolyte is of a porous network structure prepared by condensation reaction of a lithium salt, an ion liquid, a silane coupling agent and a catalyst and has high ion conductivity; the quasi-solid electrolyte can be used for stabilizing the stripping/deposition process of metal lithium and preventing lithium dentrites from growing, and shows relatively low overpotential and long-term cycle stability during the constant-current polarization process; and the interface impedance of a metal lithium sheet and the quasi-solid electrolyte is relatively small and is hardly increased with prolonging of the battery placement time. The preparation process of the quasi-solid electrolyte is simple, conventional equipment is used, the raw material is available, and the quasi-solid electrolyte is safe without pollution and is suitable for production on a large scale.

The invention relates to a quasi-solid electrolyte for a solar cell based on double-imidazole type ionic crystal. The quasi-solid electrolyte comprises 25-50wt% of imidazole-type ionic liquid, 30-65wt% of double-imidazole ionic crystal, 5-10wt% of iodine elementary substance and 5-10wt% of additive. The general formula of the chemical construction of the double-imidazole ionic crystal is , wherein X is Br or I or C1 or BF4 or TFSI or PF6, a and b are independently integers from 2 to 6, and c is an integer from 0 to 5. On one hand, the components of the quasi-solid electrolyte do not contain organic solvent, the problem of organic solvent leakage is effectively avoided, and a dye-sensitized solar cell prepared by the quasi-solid electrolyte has high stability; on the other hand, the quasi-solid electrolyte contains the double-imidazole type ionic crystal, the conductivity of the quasi-solid electrolyte is improved, and accordingly the photoelectric converting efficiency of the dye-sensitized solar cell is improved.

The invention discloses a quasi-solid electrolyte. The quasi-solid electrolyte is characterized by being prepared through gelatinizing a liquid electrolyte in a manner of introducing at least one amide organic micromolecular gelatinizer of a specific structure into the liquid electrolyte, wherein the amide organic micromolecular gelatinizer is prepared through the chemical reaction between acyl chloride and amine or an amine derivative or between the acyl chloride and an ammonium salt or ammonium salt derivative. The electrolyte can be applied to the fields of dye-sensitized solar cells, quantum-dot solar cells and the like, the problem that liquid-electrolyte cells are difficult in seal and easy in leakage is solved, and the long-term stability of the solar cells can be improved effectively.