10 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.

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 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 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.

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.

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.