12results about How to "Guaranteed cycle stability" patented technology

This invention provides a battery activator and its preparation method, an activation film, a negative electrode, a battery, a battery pack, and an electrical device. The battery activator includes a shell and a slow-release material encapsulated within the shell. The slow-release material includes additives required for forming an SEI film. The shell includes a first polymer layer adjacent to the slow-release material and a second polymer layer away from the slow-release material. The first polymer layer includes a plurality of first micropores, and the second polymer layer includes a plurality of second micropores. The second polymer layer includes a cross-linked polymer formed by cross-linking C-C unsaturated polymers. The pore size of the first micropores is not greater than 0.2 μm, and the pore size of the second micropores is not less than 0.5 μm. The battery activator of this invention can continuously provide the additives required for forming an SEI film in the battery cell, thereby ensuring the capacity utilization and cycle stability of the battery cell.

The application belongs to the technical field of lithium batteries, and discloses a gel electrolyte taking a functionalized two-dimensional MXene material as a dispersant as well as a preparation method and application of the gel electrolyte. The gel electrolyte comprises a functionalized MXene material and a basic electrolyte; the functionalized MXene material is obtained by the following method: 1) treating a MAX phase material with a solution containing HCl and LiF, intercalating, peeling off, and then reacting with a diazonium salt solution to obtain a sulfonic acid functionalized MXene material. The application further discloses a preparation method of the gel electrolyte. The application reconstructs a lithium ion solvation structure, reduces a desolvation energy barrier, homogenizes a bulk phase electric field and ion flow, cooperatively induces formation of a stable SEI interface rich in inorganic species, significantly inhibits lithium dendrite growth, and improves interface kinetic stability. The method is simple and low in cost. The electrolyte is used in a lithium metal battery and exhibits excellent cycle performance.

The invention discloses a forming method of a magnesium oxide-based carbon dioxide adsorbent suitable for large-scale preparation. The forming method comprises the following steps: calcining a magnesium-containing precursor to prepare porous magnesium oxide raw powder; the preparation method comprises the following steps: carrying out impregnation modification on magnesium oxide raw powder and an alkali metal salt solution to obtain wet mixed thick slurry, drying the slurry, and carrying out secondary calcination to obtain modified adsorbent raw powder; and mixing the raw powder with deionized water, a forming aid and the like to prepare a plastic wet material, and performing extrusion-spheronization balling, drying and calcining to obtain regular spherical adsorbent particles. The formed adsorbent prepared through the method has the advantages of being controllable in particle size, high in mechanical strength, good in adsorptive property after being formed, excellent in cycling stability and the like, can be used for CO2 chemical adsorption trapping of CO2-containing gas under the medium-temperature condition, and is good in CO2 adsorptive property, economical efficiency of the technological method and environmental protection performance, the process technology is easy to amplify, and the method is suitable for industrial production. The method is suitable for industrial large-scale production.

The application provides a metal oxide supported active metal catalyst, a preparation method and application thereof. The metal oxide supported active metal catalyst comprises a metal oxide carrier and active metal particles supported on the metal oxide carrier; the loading amount of the active metal is 0.1wt%-5wt% based on 100% of the mass of the metal oxide carrier. It is tested that the hydrogenation reaction of carbonates to prepare formate by using the metal oxide supported active metal catalyst provided by the application as a hydrogen source or using gaseous carbon monoxide with different concentrations and water to provide in-situ hydrogen source for the water gas shift reaction realizes the hydrogenation reaction of carbonates to prepare formate, the yield of the obtained formate is high, the selectivity is above 99%, there is no attenuation after 6 cycles, and the metal oxide supported active metal catalyst has excellent bifunctional effect. In addition, the preparation method of the metal oxide supported active metal catalyst is simple, the operation condition is mild, and the cost is low, so that large-scale production can be realized.

The invention discloses a preparation method and application of an electrolytic water anode oxygen evolution catalyst. The method comprises the following steps: dissolving a nickel salt, a molybdenum salt and a sulfur source in water, and adjusting the pH value to be acidic to obtain an electrodeposition electrolyte; a three-electrode system composed of a conductive substrate, a counter electrode and a reference electrode is inserted into the electro-deposition electrolyte and electrified, and the electrolytic water anode oxygen evolution catalyst is electro-deposited on the conductive substrate. The catalyst prepared by the preparation method disclosed by the invention has rich nano structures and electronic effects, and can show relatively high intrinsic catalytic activity; and meanwhile, the catalyst is tightly combined with the conductive substrate, so that the cycling stability of the material in alkaline electrolyte is further ensured. The water electrolysis oxygen evolution reaction catalyst prepared by the one-time electrodeposition method has the advantages of simple process, easiness in scale production, no need of additional addition of a binder, direct in-situ growth on a conductive substrate, and improvement of the binding force of the catalyst and the substrate, so that the charge transfer efficiency and the structural stability are improved, and the method has a good application prospect in water electrolysis anode oxygen evolution.

This invention discloses an integrated device for purifying impurities in electrolytically produced gases and enriching carbon dioxide based on pressure swing adsorption (PSA), belonging to the field of gas separation and new energy utilization technology. The device includes a water electrolysis unit, a PSA unit, and a control unit. The water electrolysis unit uses renewable energy to electrolyze water to produce crude hydrogen. The PSA unit comprises at least two sets of adsorption towers connected in parallel, filled with a composite adsorbent that selectively adsorbs oxygen and carbon dioxide. The control unit uses time-series control to alternately operate the adsorption towers between a "purification mode" and an "enrichment and regeneration mode." In purification mode, the adsorption towers remove oxygen impurities from the crude hydrogen; in enrichment and regeneration mode, the adsorption towers adsorb carbon dioxide from an external gas source and output enriched gas through vacuum desorption. This invention achieves high integration and low energy consumption by time-sharing reuse of the same set of adsorption towers, making it particularly suitable for preparing raw material gas for hydrogen autotrophic microorganisms to synthesize single-cell proteins (air proteins).

The invention provides a method for preparing a sodium-ion battery hard carbon negative electrode with a high cross-linked structure based on cooperative cross-linking of hydroxyl enriched lignin and oxidized asphalt, and belongs to the technical field of preparation of sodium-ion battery negative electrode materials. The high-performance hard carbon negative electrode can be prepared without a solvent and an additional additive by optimizing a lignin pretreatment process and an asphalt pre-oxidation process and improving an asphalt-lignin cross-linking mode; by adopting the biomass derivative and petroleum asphalt composite carbon source, the method has the advantages of low cost, environmental protection and accessible raw materials; the sodium ion battery with the obtained hard carbon negative electrode has excellent electrochemical performance and is suitable for large-scale production of the sodium ion battery; and the practicability is high.

The application relates to the technical field of high ignition point insulating oil, and particularly discloses a metal-supported catalyst and application of the metal-supported catalyst in high ignition point insulating oil. The metal-supported catalyst comprises a carrier, an active metal supported on the carrier and a composite metal oxide mesoporous layer, the carrier is a metal oxide and is at least one selected from MoO2, Al2O3, ZrO2, MgO, TiO2 and SnO2; the active metal is a transition metal and is at least one selected from Fe, Co, Cu, Ni, Ti, Zr, Mn, V and Zn; and raw materials of the composite metal oxide mesoporous layer comprise SiO2, ZrO2 and a carbon precursor. The metal-supported catalyst can be used for synthesizing ester insulating oil, can produce high-efficiency catalysis on synthesis of the ester insulating oil with a small amount, has high cycle stability and can keep excellent catalytic efficiency after multiple cycles.

The present application relates to the technical field of lithium metal battery, especially to an electrolyte for lithium metal / lithium iron phosphate battery system and a lithium metal / lithium iron phosphate battery. The electrolyte for lithium metal / lithium iron phosphate battery system comprises lithium salt, solvent and additive; the additive comprises 1,4-butylenesulfone and fluoroethylene carbonate, and the solvent comprises ether solvent. The electrolyte for lithium metal / lithium iron phosphate battery system has good compatibility with lithium metal, can form a stable solid-state electrolyte interface film on the surface of lithium metal negative electrode, and the addition of 1,4-butylenesulfone and fluoroethylene carbonate can improve the stability and ionic conductivity of the electrolyte film, thereby ensuring the coulomb efficiency and cycle stability of the battery.

The application belongs to the technical field of aqueous zinc ion batteries, and discloses a low-temperature-resistant aqueous zinc ion battery and a preparation method thereof. The low-temperature-resistant aqueous zinc ion battery is constructed by using a single or composite positive electrode material with excellent zinc ion storage performance and ion diffusion dynamics, and using a composite aqueous solution system with various cations and anions combined and regulated as an electrolyte, and cooperating with zinc metal as a negative electrode. The low-temperature-resistant aqueous zinc ion battery is a low-temperature button type, soft package or cylindrical zinc ion battery. The application designs and regulates the interaction and hydrogen bond network distribution of various salt solutes and pure water solvents of the low-temperature-resistant electrolyte, matches the zinc storage positive electrode material with good ion dynamics in a low-temperature environment, and constructs the zinc ion battery with stable working capacity and high specific capacity at an extremely low temperature (‑80℃), which is applied as an energy supply device in various extreme environments.

The present application relates to a resin-assisted gradient-doped LMFP positive electrode material, a preparation method and a positive electrode, the preparation method comprising: mixing a sulfonic acid type cation exchange resin with a mixed salt solution, loading metal ions on the sulfonic acid type cation exchange resin, washing to obtain a loaded resin; heat treating the loaded resin to uniformly disperse metal oxides, and then mixing with a phosphoric acid solution to obtain a mixed solution; the mixed solution is dried by spray drying to obtain a precursor powder; mixing a lithium source, a nitrogen-doped carbon source and the precursor powder, and wetting with a glucose solution to form a slurry mixture; after the slurry mixture is dried, sintering is performed to obtain the resin-assisted gradient-doped LMFP positive electrode material. The present application can inhibit the Jahn-Teller distortion of Mn, and improve the cycle stability and conductivity of the positive electrode material.

This invention relates to the field of vanadium redox flow battery technology and discloses a method for preparing a solid-liquid hybrid vanadium redox flow battery electrolyte. The method includes adding demineralized water, concentrated sulfuric acid, industrial-grade V₂O₅, and oxalic acid as a reducing agent to a reaction vessel to obtain a 3.5-valent vanadium ion liquid electrolyte; stirring the main material vanadium-based oxide, a porous solid carrier, and auxiliary materials conductive agents and binders to obtain a micron-sized vanadium-based slurry; granulating and sintering the micron-sized vanadium-based slurry to obtain a vanadium-based solid porous material; and assembling the vanadium-based solid porous material and the 3.5-valent vanadium ion liquid electrolyte into a separate solid-liquid reactor to obtain the solid-liquid hybrid vanadium redox flow battery electrolyte. This invention, by combining a solid-phase energy storage active material with a 3.5-valent vanadium ion liquid electrolyte, increases the total charge capacity of the vanadium redox flow battery and improves its volumetric energy density without increasing the volume and concentration of the 3.5-valent vanadium ion liquid electrolyte.