24 results about "Lithium iodide" patented technology

This invention relates to a method for iodine-induced lithium intercalation and exfoliation of two-dimensional materials, comprising the following steps: uniformly mixing a target bulk layered material with an inorganic salt to obtain mixture A; the inorganic salt contains lithium iodide; heating mixture A to 280–400°C under a vacuum environment or protective atmosphere, while simultaneously applying ultraviolet light irradiation, and obtaining mixture B through solid-state lithiation treatment; dispersing mixture B in deionized water, and obtaining the two-dimensional material through hydrolysis exfoliation, separation, washing, and drying. This invention uses an inorganic salt containing lithium iodide as the intercalation medium, and through the synergistic excitation of a light field and a thermal field, induces the oxidative decomposition of halide ions and the release of electrons, driving alkali metal ions to intercalate into the interlayer gaps of the bulk layered material to achieve in-situ solid-state intercalation. Then, through hydrolysis exfoliation, an ultrathin two-dimensional material with a large lateral dimension is obtained. The process is safe, has high intercalation efficiency, and good versatility.

The application discloses a method for preparing a disulfide at low temperature, which comprises the following steps: coupling reaction of m-dihalobenzene and a mercapto compound in the presence of sodium hydride and lithium iodide to prepare the disulfide. At present, the existing methods for synthesizing a disulfide have some problems to a greater or lesser extent. Either noble metal catalysis is needed, the cost is high, and there is a risk of heavy metal residue in the product; or the reaction operation is complex and complicated, and the reaction condition is harsh. The application develops a new method, which can start from cheap and readily available raw materials, use cheap initiators, and simply and effectively synthesize a disulfide under mild reaction conditions, so as to meet the needs of research and development and actual production.

The preparation method comprises the following steps: mixing a lithium source material, water, a first solvent and quaternary amine alkali, reacting the quaternary amine alkali with carbon dioxide in a reaction atmosphere containing carbon dioxide to generate HCO3 <->, reacting the HCO3 <-> with lithium ions in the lithium source material to generate lithium bicarbonate, and collecting a water phase after the reaction; decomposing lithium bicarbonate in the water phase to generate lithium carbonate, collecting a solid phase, and decomposing lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving quaternary ammonium iodide in a second solvent, adding the intermediate, converting the lithium oxide into lithium hydroxide, carrying out ion exchange on the lithium hydroxide and the quaternary ammonium iodide to generate lithium iodide, and collecting a liquid phase; and collecting the lithium iodide in the liquid phase. According to the present invention, based on the characteristics of the specific quaternary ammonium base and the quaternary ammonium iodide salt, the Li in the lithium source material is selectively reinforced, carbonized and leached, the anion impurities in the lithium source material are removed, the anion exchange in the organic phase is achieved, and the high-purity anhydrous lithium iodide is prepared.

A fiber-reinforced lithium borohydride-based all-solid-state electrolyte for suppressing dendrite formation, its preparation method, and its application are disclosed. The method employs a reverse micelle precipitation method to prepare a precursor solution by dissolving lithium borohydride and lithium iodide in an ether solvent solution. Aluminum oxalate and vapor-grown carbon fibers are then added, followed by dropwise addition to an isopentane solution containing a surfactant. After reverse micelles form, the solution is allowed to settle and react completely, and the solvent is thoroughly removed. The product from the settled reaction is dried and then subjected to partial hydrogen release treatment. The partially hydrogen-released product is dispersed in a benzene solution containing polymethyl methacrylate, freeze-dried, and then melt-reacted in situ in a universal mold. This process is simple and highly controllable, significantly improving the mechanical stability and dendrite resistance of the lithium borohydride-based all-solid-state electrolyte, and enabling long lifespan of all-solid-state lithium batteries under fast-charging conditions, thus facilitating commercial applications.

The present application relates to a modified solid-state electrolyte material, a preparation method thereof and a full solid-state lithium ion battery, and belongs to the technical field of full solid-state lithium ion batteries.The modified solid-state electrolyte material comprises solid-state electrolyte particles and a lithium iodide and ethyllithium complex coating layer coated on the surface of the solid-state electrolyte particles.The preparation method comprises coating LiI on the surface of the solid-state electrolyte particles to obtain LiI-coated solid-state electrolyte particles;mixing the LiI-coated solid-state electrolyte particles with C2H5Li, and then complexing by heating to form a lithium iodide and ethyllithium complex coating layer on the surface of the solid-state electrolyte particles, thereby obtaining the modified solid-state electrolyte material.The modified solid-state electrolyte material can significantly improve the compatibility of the solid-state electrolyte and the pole piece, and has low cost.

The present invention relates to a method for producing a lithium halide compound, capable of industrially advantageously producing a lithium halide compound having a low water content, particularly lithium bromide and lithium iodide, at a high reaction efficiency without accompanying a step of directly removing water, and the method including mixing lithium sulfide, a halogen molecule of at least one of bromine and iodine, and a first solvent; and removing the first solvent, wherein the first solvent is a solvent that dissolves a lithium halide containing the same halogen element as the halogen molecule.

The invention discloses a pyrite-based composite positive electrode material, a preparation method thereof and an application of the pyrite-based composite positive electrode material in an all-solid-state battery, the preparation method of the pyrite-based composite positive electrode material comprises the following steps: (1) carrying out oscillation ball milling treatment on pyrite square crystals to obtain iron sulfide fine powder; (2) mixing lithium sulfide and lithium iodide, and then carrying out high-energy ball milling treatment to obtain a lithium-iodine-sulfur amorphous mixture; and (3) mixing the iron sulfide fine powder and the lithium-iodine-sulfur amorphous mixture, and then carrying out high-energy ball milling treatment to obtain the pyrite-based composite positive electrode material. The pyrite-based composite positive electrode material is combined with a solid electrolyte membrane and a lithium-indium negative electrode, so that a high-capacity and low-attenuation pyrite composite positive electrode sulfide all-solid-state battery can be prepared, and high specific capacity and long circulation performance are shown.

The application relates to a self-bleaching electrochromic device based on titanium dioxide and lithium iodide, and belongs to the technical field of electrochromic devices. The application discloses a self-bleaching electrochromic device based on titanium dioxide and lithium iodide, which comprises a non-polar self-bleaching electrochromic device or a polar self-bleaching electrochromic device. The application has the following advantages: (1) the cycle life of the electrochromic device is improved, and the color change contrast of the electrode in the 300nm-800nm visible light band is less than 5% after at least 4000 coloring-bleaching on-off cycle operations; (2) the electrode is self-bleached, that is, the electrode can be completely restored to the state before color change within 60s under the condition of no additional voltage; and (3) the device is non-polar, that is, both electrodes can be used as cathodes or anodes, and can normally work under the condition of an additional positive or negative voltage, and the same color change performance index is achieved.

The utility model belongs to the technical field of lithium batteries, and particularly relates to a device for synthesizing anhydrous lithium iodide. Comprising a tubular reactor, a material processing tank and a vacuum dryer, one end of the tubular reactor is provided with a feed port, and the other end is provided with a discharge port; the material treatment tank is connected with the discharge port through a material flowing pipe, a filter membrane is detachably mounted in the material treatment tank, the top of the material treatment tank is connected with a feeder through a feeding pipe, and a first valve is arranged on the feeding pipe; and the vacuum dryer is connected to the bottom of the material treatment tank through a material outlet pipe. By adopting the tubular reactor, the reaction efficiency is effectively improved, and the tubular reactor has the characteristic of small backmixing, so that the volume efficiency (unit volume production capacity) is high, the reaction efficiency of lithium hydroxide and hydrogen iodide is accelerated, the problem of non-uniform concentration of a reaction system in the industrial production process of lithium iodide is avoided, and the product quality is improved. And meanwhile, the production efficiency of anhydrous lithium iodide is improved.

A preparation method of lithium iodide and a solid-state battery, the preparation method comprising mixing a lithium source material, water, a first solvent and a quaternary amine base, reacting the quaternary amine base with carbon dioxide under a reaction atmosphere containing carbon dioxide to generate HCO3 ‑ , HCO3 ‑ reacting with lithium ions in the lithium source material to generate lithium bicarbonate, collecting an aqueous phase after the reaction; decomposing the lithium bicarbonate in the aqueous phase to generate lithium carbonate, collecting a solid phase, decomposing the lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving a quaternary ammonium iodide salt in a second solvent and adding the intermediate, converting the lithium oxide into lithium hydroxide, and performing ion exchange between the lithium hydroxide and the quaternary ammonium iodide salt to generate lithium iodide, collecting a liquid phase; and collecting the lithium iodide in the liquid phase. Based on the characteristics of the specific quaternary amine base and the quaternary ammonium iodide salt, the application selectively enhances carbonization leaching of Li in the lithium source material, removes anion impurities in the lithium source material, and also realizes anion exchange in an organic phase and preparation of high-purity anhydrous lithium iodide.

The application belongs to the technical field of lithium metal batteries and photoelectrochemical energy storage, and discloses a starch-polyiodide composite solid electrolyte film and a preparation method thereof. The electrolyte film takes a polymer as a matrix, lithium bisfluorosulfonylimide and the like as a lithium salt, and a mixture of soluble branched starch, lithium iodide and iodine as a redox composite filler. Through the synergistic effect of the soft support effect of starch and the iodine-based redox pair, a uniform mixed conductive network is constructed, which can effectively reduce the interface impedance, inhibit the polymer crystallization, and significantly improve the ionic conductivity, lithium ion transference number and mechanical flexibility. The application further provides an integrated flexible photoelectrochemical energy storage battery device. The positive electrode-electrolyte integration is realized through an in-situ coating process, so that the device can still work stably under repeated bending and folding, and has high-efficiency light charging function, thereby providing a high-performance and high-safety solid electrolyte solution for the flexible light charging lithium metal battery.

The application discloses a glassy sulfide solid electrolyte with high lithium iodide content, a preparation method thereof and application of the glassy sulfide solid electrolyte in a full solid-state lithium metal battery. A synthesis procedure of the glassy sulfide solid electrolyte comprises a manual pre-grinding raw material procedure and a mechanical ball milling procedure. A general formula of the prepared glassy sulfide solid electrolyte is (0.65-x)((0.75+0.5y)Li2S-(0.25-0.5y)P2S5-yMS2)-(0.35+x)LiI, wherein x>=0, wherein y>0, and wherein M is a metal or a non-metal element in the fourth main group. The novel glassy sulfide solid electrolyte with high lithium iodide content has high ionic conductivity and good stability to metal lithium. The full solid-state lithium metal battery assembled by using the novel glassy sulfide solid electrolyte with high lithium iodide content has the characteristics of excellent cycle performance, high charge-discharge specific capacity and high safety.

The invention provides a lithium ion battery, and belongs to the technical field of secondary batteries, the lithium ion battery is internally provided with a quenching device, and the quenching device comprises a container and a quenching agent. Wherein the quenching agent is packaged in the container, the quenching agent comprises a solvent and a quenching material dissolved in the solvent, the quenching material comprises lithium polysulfide and / or lithium polyiodide, the lithium polysulfide comprises Li2Sx, x is greater than or equal to 2 and less than or equal to 6, the lithium polyiodide comprises LiIy, and y is greater than or equal to 3 and less than or equal to 5. According to the lithium ion battery, the quenching device is arranged in the lithium ion battery, so that the thermal safety performance of the battery can be effectively improved on the premise of not increasing the internal resistance of the battery and not influencing the electrochemical performance of the battery.

The invention belongs to the technical field of capacitors, and discloses a high-voltage fast-charging hybrid supercapacitor and a preparation method and application thereof. The hybrid supercapacitor comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive electrode comprises a positive current collector and a positive active layer combined on the surface of the positive current collector, and the negative electrode comprises a negative current collector and a negative active layer combined on the surface of the negative current collector; the electrolyte comprises a molecular catalyst and a fluorine-containing organic solvent; the molecular catalyst comprises one or more of sodium iodide, sodium chloride, magnesium chloride, cobalt chloride, ammonium chloride, ammonium iodide, cobalt bromide, sodium bromide, aluminum bromide, lithium bromide, lithium iodide, zinc chloride and zinc iodide; the fluorine-containing organic solvent comprises a fluoro-carbonic ester organic solvent and / or a fluoro-ether organic solvent. The hybrid supercapacitor provided by the invention has the advantages of rapid charging and discharging capability, high working voltage, high energy density, high power density and excellent cycle life, and is suitable for higher energy storage and release requirements.

This invention discloses a method for preparing sulfur-containing ether compounds, comprising the following steps: in the presence of sodium hydride and lithium iodide, o-iodoaryl ether undergoes a coupling reaction with thiophenol or thiol to prepare the sulfur-containing ether compound. This invention prepares aryl sulfides from o-iodoaryl ether and thiophenol / thiol under NaH and LiI conditions. Compared with other conventional methods, this method does not require transition metal catalysis, has mild reaction conditions, and is simple to operate, providing a novel method for synthesizing sulfur-containing ether compounds with broad application prospects.

Provided is a lithium iodide nonaqueous solution containing a nonaqueous solvent and lithium iodide. This lithium iodide nonaqueous solution is characterized in that the water content per lithium iodide unit (Y / X), determined by the water content Y (ppm) in the lithium iodide nonaqueous solution relative to the lithium iodide concentration X (wt.%) in the lithium iodide nonaqueous solution, is 7 or less, and the content of an acid-derived component is 4,000 ppm or less.

The application provides an electrolyte applied to a lithium ferrous disulfide battery and a preparation method, the preparation method comprises the following steps: S1, dissolving lithium nitrate and lithium iodide in dioxolane (DOL), fully stirring to make them fully dissolved, and obtaining a first solution; S2, adding ethylene glycol dimethyl ether (DME) into the first solution, fully stirring until clear and transparent, and obtaining a second solution; S3, adding dimethylacetamide (DMAC) into the second solution, fully stirring until clear and transparent, and obtaining a finished electrolyte. The solvent dimethylacetamide (DMAC) with a high DN value is added, dioxolane (DOL) is made to form a thinner interface film to ensure the diffusion efficiency of lithium ions, and the activation energy required by a reaction is reduced by weakening the ferrous-sulfur bond, so that the discharge voltage and the discharge capacity of the lithium ferrous disulfide battery in a wider temperature range, especially at low temperature, are ensured, and the rate performance of the battery is improved.

This invention belongs to the technical field of solid electrolytes and discloses a method for preparing a liquid-phase doped silver-germanium sulfide solid electrolyte with high ionic conductivity. The method includes: 1) dispersing lithium sulfide and phosphorus pentasulfide in an organic solvent, heating and stirring to obtain a precursor solution containing Li3PS4; 2) mixing lithium iodide, sulfur powder, and additives with the precursor solution, heating and stirring to remove the organic solvent, and obtaining a powder; 3) sintering the powder under a protective atmosphere to obtain a silver-germanium sulfide solid electrolyte; the additives are one or more of SiS2, GeS2, SnS2, As2S3, and Sb2S3. This invention is simple, and the prepared silver-germanium sulfide electrolyte undergoes elemental doping during thermal crystallization, improving the electrolyte's ionic conductivity and air stability. This method is suitable for industrial production.

Provided are a composite electrolyte with a wide working voltage range for an all-solid-state lithium-ion battery, and a preparation method and use thereof. The composite electrolyte includes a lithium borohydride-based solid-state electrolyte and a polymer coating layer coated on a surface of the lithium borohydride-based solid-state electrolyte. A voltage window of the composite electrolyte with the wide working voltage range is not less than 6 V and up to 10 V. The lithium borohydride-based solid-state electrolyte comprises lithium borohydride, alumina, and lithium iodide. The polymer coating layer is poly(methyl methacrylate). A mass percentage of the lithium borohydride-based solid-state electrolyte in the composite electrolyte with the wide working voltage range is in a range of 70 wt. % to 99 wt. %; and a mass percentage of the polymer coating layer in the composite electrolyte with the wide working voltage range is in a range of 1 wt. % to 30 wt. %.

The application relates to the technical field of solid-state batteries, and discloses a full-solid-state lithium-selenium battery composite positive electrode material and a preparation method and application thereof, wherein the composite positive electrode material comprises elemental selenium, silver iodide, conductive carbon and a sulfide solid-state electrolyte; according to the total mass percentage of the elemental selenium, the silver iodide, the conductive carbon and the sulfide solid-state electrolyte, the elemental selenium accounts for 25-35%, the conductive carbon accounts for 10-20%, the molar ratio of the elemental selenium to the silver iodide is 8-32:1, and the balance is the sulfide solid-state electrolyte; and the charge-discharge voltage window of the composite positive electrode material is 0.8-1.8 V. The elemental selenium positive electrode is modified by AgI, in-situ reaction of elemental silver nanoparticles and lithium iodide phases can be generated under the charge-discharge voltage window, the electron and ion collaborative transmission channel is greatly widened, the solid-solid interface impedance is reduced, the volume shrinkage and expansion are effectively relieved, and therefore the composite positive electrode material exhibits good rate performance and long cycle stability.

The invention relates to the technical field of acetic acid synthesis, in particular to a catalyst system for synthesizing acetic acid through methanol carbonylation and a using method thereof.The catalyst system is prepared from, by mass, 0.01-1 part of iridium salt, 0.01-3 parts of ruthenium salt, 5-20 parts of lithium iodide, 0.1-5 parts of nitrogen-containing ligand, 10-40 parts of ionic liquid and 40-60 parts of acetic acid; the mass ratio of the iridium salt to the ruthenium salt is 1: (0.5-3); the ratio of the total mass of the iridium salt and the ruthenium salt to the mass of the nitrogen-containing ligand is 1: (1-5). Ruthenium salt can stabilize high-valence iridium intermediates, inhibit decomposition and inactivation of the high-valence iridium intermediates, promote iodide ion transfer and improve catalytic cycle efficiency, iridium-ruthenium bimetal salt forms stable metal chelate through electron transfer and nitrogen-containing ligand bridging, CO insertion is accelerated, the catalytic cycle period is shortened, and the space-time yield of acetic acid is improved.

A curable resin composition includes 100 parts by weight of a curable resin, 0.1 to 5 parts by weight of a first catalyst that is lithium iodide, and 75 parts by weight or less of a flame retardant. A curable preform composition includes the curable resin composition and a fiber reinforcement. At least 5 parts by weight of the curable resin in the curable preform composition is a benzoxazine resin in 100 parts by weight of the curable resin. A method for preparing a curable preform composition includes mixing 100 parts of a curable resin, 0.15 to 5 parts by weight of a first catalyst, 75 parts or less of a flame retardant, and a fiber reinforcement to prepare an uncured curable preform composition, and curing the uncured curable preform composition to prepare the curable preform composition.

Electrochemical cell in which lithium ions move back and forth, comprising: Electrode comprising a chalcogen-containing electroactive material, wherein the chalcogen-containing electroactive material comprises elemental selenium or a selenium-containing active material; and Electrolyte system, including: one or more lithium salts selected from the group consisting of: lithium bis(fluorosulfonyl)imide (LiN(FSO2)2), bis(trifluoromethane)sulfonimide lithium salt (LiN(CF3SO2)2), lithium hexafluorophosphate (LiPF6), lithium hexafluoroarsenate (LiAsF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiClO4), lithium iodide (LiI), lithium bromide (LiBr), lithium thiocyanate (LiSCN), lithium difluoro(oxalato)borate (LiBF2(C2O4)), LiPF3(C2F5)3, LiPF4(CF3)2, lithium tetrafluoro(oxalato)phosphate (LiPF4(C2O4)), LiPF3(CF3)3, LiSO3CF3 and combinations thereof, and one or more solvents selected from the group consisting of: cyclic carbonates, linear carbonates, aliphatic carboxylic esters, γ-lactones, chain structure ethers, cyclic ethers and combinations thereof, wherein the electrolyte system is essentially free of lithium nitrate (LiNO3) and the electrochemical cell has a minimum charge potential of more than or equal to about 0.8 V to less than or equal to about 1.8 V.

The present application provides a method for synthesizing n-butyric acid from n-propanol carbonyl, which comprises the following steps: taking n-propanol as raw material, and performing carbonylation reaction in the presence of a catalytic system composed of a rhodium main catalyst, lithium iodide, hydroiodic acid and a nickel salt auxiliary, and introducing carbon monoxide. The present application overcomes the huge steric hindrance and thermodynamic instability brought by carbon chain growth (from C1 methanol to C3 n-propanol), breaks the extremely low reaction rate of n-propanol carbonylation (kinetic bottleneck), effectively inhibits the isomerization side reaction specific to long carbon chain, and thus provides a n-butyric acid synthesis method with high space-time yield and high product selectivity.