13 results about "Propane sultone" patented technology

This invention discloses a silicon-based anode binder for lithium-ion batteries and its preparation method, relating to the field of silicon-based anode technology. The method includes first ring-opening sulfonation of polyetheramine with 1,3-propanesulfonyl lactone in an aqueous phase to obtain sulfonated polyetheramine; then, polyacrylic acid is activated by EDC·HCl and NHS and then amidated and grafted onto the sulfonated polyetheramine to obtain sulfonated polyetheramine-grafted polyacrylic acid; finally, the aqueous solution of this graft is in-situ coordinated with 2-methylimidazole and zinc nitrate to generate ZIF-8 nanoparticles, and then succinic acid and choline chloride are added for regulation to obtain the binder. This invention achieves dual modification through molecular grafting of flexible sulfonated polyether segments and in-situ construction of a three-dimensional ZIF-8 conductive network, utilizing succinic acid and choline chloride to eliminate competitive coordination of active groups, significantly improving ionic conductivity and stabilizing the electrode structure.

The application relates to the technical field of batteries, in particular to an electrolyte suitable for primary lithium-manganese batteries and a preparation method thereof. The electrolyte comprises propylene carbonate, ethylene carbonate, lithium bisfluorosulfonylimide, lithium perchlorate, lithium bisoxalate borate, terminal bisdifluorophosphorylated oligomeric trimethylene carbonate, ethylene glycol dimethyl ether, lithium difluorooxalate borate and 1,3-propane sultone. The electrolyte is prepared through a pre-coordination and segmented dilution process with specific timing. The electrolyte system can synergistically optimize the electrode interface film forming process, has high discharge capacity retention rate and low direct current resistance at low temperature (-20 DEG C), and has high capacity retention rate after high-temperature storage (60 DEG C), thereby significantly improving the comprehensive performance of the primary lithium-manganese battery in a wide temperature range.

The application discloses a sewage treatment filtering membrane and a preparation method thereof, and relates to the technical field of membrane materials. In the preparation of the sewage treatment filtering membrane, an amphoteric ion intermediate is reacted with 1,3-propane sulfone lactone to obtain an amphoteric ion monomer; the amphoteric ion monomer and N,N-methylene bisacrylamide are in-situ cross-linked and polymerized in a polyvinylidene fluoride solution to obtain a casting solution; the casting solution is used to prepare a functionalized polyvinylidene fluoride membrane through a non-solvent induced phase separation technology; hydrochloric acid dopamine and polyethylene imine are co-deposited on the surface of the functionalized polyvinylidene fluoride membrane to obtain a porous polyvinylidene fluoride membrane; and copper sulfate pentahydrate is used to catalyze modified indole derivatives to be grafted on the surface of the porous polyvinylidene fluoride membrane, so as to obtain the sewage treatment filtering membrane. The sewage treatment filtering membrane prepared by the application has excellent hydrophilic, anti-pollution and antibacterial properties.

An electrolyte, a secondary battery, and an electronic device. The electrolyte comprises ethyl 2,2-difluoroacetate, 1,2,3-tris(2-cyanoethoxy)propane, and 1,3-propane sultone. Based on 100 parts by mass of the electrolyte, ethyl 2,2-difluoroacetate accounts for 1.5 to 6 parts by mass, 1,2,3-tris(2-cyanoethoxy)propane accounts for 0.5 to 4 parts by mass, and 1,3-propane sultone accounts for 1 to 5.5 parts by mass. The overcurrent and overtemperature safety of secondary batteries are improved.

The present invention relates to a nonaqueous electrolyte comprising a lithium salt, an organic solvent, and an additive, wherein the additive comprises a compound represented by Chemical Formula 1, the additive comprises at least one of the compound represented by Chemical Formula 1, ethylene sulfate, and 1,3-propane sultone, the content of the compound represented by Chemical Formula 1 in the nonaqueous electrolyte is 0.25 to 1.60% by weight based on the total weight of the nonaqueous electrolyte, and the total content of the compound represented by Chemical Formula 1, ethylene sulfate, and 1,3-propane sultone can be 0.25 to 1.60% by weight.[Chemical Formula 1]In Chemical Formula 1, R1 is -O-NO2, L1 is an alkylene oxy group having 1 to 5 carbon atoms, M is a metal cation or an organic cation, a is the valence of M when M is a metal cation, a is 1 when M is an organic cation, and a = b.

The application discloses a kind of high dispersion stability ultra-low structure carbon black material and its application.The material is prepared by the reaction of 3,4-dihydroxyphenethylamine, carbonyl coupling agent, N,N-dimethyl-1,3-propanediamine and 1,3-propane sulfolane to obtain a reactive low-melting micro-phase auxiliary agent, which is then dispersed in ethylene tar after compounding with urea and choline acetate, and is prepared by incomplete combustion, quenching, elution and homologous stabilization treatment. The application utilizes the micro-phase isolation effect of the composite micro-phase auxiliary agent during the formation of carbon black, reducing the branching degree of carbon black aggregates; and through post-treatment, a stable layer containing catechol / quinoxaline anchoring structure and sulfobetaine hydration structure is formed, improving the water-based dispersion stability of carbon black. The obtained carbon black material has the advantages of low structure, low metal residue, narrow particle size distribution and good anti-settling property, and can be used in water-based paint, water-based ink, water-based conductive paste and water-based polymer composite.

To address the issues of poor cycle performance and heat resistance in lithium-ion batteries, this invention provides a non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte, by weight (100%), comprises the following components: 5%–20% lithium hexafluorophosphate, 1%–10% lithium difluorosulfonylimide, 0.1%–2% hexamethylene diisocyanate, 0.1%–2.5% 3-fluoro-1,3-propanesulfonyl lactone, and the balance being an organic solvent composed of symmetrical chain carbonates, cyclic carbonates, and chain carboxylic acid esters. The non-aqueous electrolyte provided by this invention effectively improves the wettability between the non-aqueous electrolyte and the electrode sheet, facilitating lithium-ion diffusion. Simultaneously, it exhibits good chemical stability at high temperatures, thereby significantly improving the cycle life and high-temperature resistance of lithium-ion batteries.

Improved electrolytes for lithium-based cells can include a dual salt combination of lithium hexafluorophosphate and lithium bis(fluorosulfonyl)imide or lithium bis(trifluoro-methanesulfonyl)imide, and a solvent that includes dimethyl carbonate, ethylmethyl carbonate and 5 to 25 volume percent of fluoroethylene carbonate. The improved electrolytes can include additives triethyl phosphate, ethoxy(pentafluoro)cyclotriphosphazene, 1,3-propane sultone, or mixtures thereof, and have small limited amounts of additional cosolvents and / or lithium-free organic additives. The improved electrolytes can be used to prepare lithium-based cells with silicon-based active materials as negative electrodes and nickel rich lithium metal oxides as positive electrodes. The lithium-based cells can achieve high energy, high power, fast charge and long cycle life along with good thermal stability.

The present disclosure provides an electrolyte comprising: an electrolyte comprising: (a) a primary lithium salt; (b) a secondary lithium salt; and (c) an additive; wherein the primary lithium salt is lithium hexafluorophosphate (LiPFe); the primary lithium salt and the secondary lithium salt are in a mole ratio range of 4:1 to 6:1; and the additive is selected from vinylene carbonate, propane sultone, lithium difluoro(oxalato)borate (LiDFOB), 1,3,6 hexanetricarbonitrile (HTCN), or combinations thereof. The present disclosure further provides an electrochemical cell comprising the electrolyte as disclosed herein.

The present application relates to the technical field of biodiesel preparation, and particularly discloses a metal-doped vacancy-type polyoxometalate ionic liquid, a preparation method and application thereof. The ionic liquid is composed of sulfonic acid group (-SO3H) containing organic cations derived from 1,3-propane sultone and vacancy-type Keggin structure heteropolyanions (PW 2+ MO 40 ) doped with metals (Zn 3+ , Fe 4+ or Sn 11 ), forming a bifunctional synergistic catalytic system with stable Brønsted acid sites and controllable Lewis acid sites. The catalyst can simultaneously and efficiently catalyze esterification and transesterification, realize the "one-pot" conversion of high-acid-value oil and fat raw materials, significantly improve the biodiesel yield, and due to the unique structure, the active sites are stable and not easy to be lost, and the recycling performance is excellent. The present application provides a new multifunctional catalyst for green and efficient production of biodiesel, and has important industrial application prospect.

The application relates to the field of electrochemistry, in particular to a sodium ion battery electrolyte, a sodium ion battery containing the electrolyte and an electronic device. The electrolyte contains a sodium salt, an ether solvent and an additive; the additive comprises a sulfur-based additive and / or a nitrogen-based additive; the sulfur-based additive comprises at least one of 1,3-propane sultone, ethylene sulfite and propylene-1,3-sulfonic acid lactone; the nitrogen-based additive comprises at least one of ethyl nitrate, propyl nitrate, sodium nitrate, potassium nitrate and bismuth nitrate; the electrolyte of the application is an ether-based electrolyte obtained through the synergistic cooperation of a sodium salt, an ether solvent and a sulfur-based additive and / or a nitrogen-based additive, which can be used as a negative electrode-free sodium ion battery electrolyte, has high discharge capacity, excellent cycle performance and rate performance and exhibits good electrochemical performance.

A secondary battery and an electronic apparatus. The secondary battery comprises a positive electrode, a negative electrode, and an electrolyte; the negative electrode comprises a negative electrode current collector and a negative electrode material provided on the negative electrode current collector; the particle size of the negative electrode material satisfying Dv10: Dv50: Dv99 = 1: (1.5-2.5): (5-6); the electrolyte comprises diethyl carbonate, ethylene carbonate, and 1,3-propane sultone; relative to 100 parts by mass of the electrolyte, the amount of diethyl carbonate is 0.5 parts by mass to 1.5 parts by mass, the amount of ethylene carbonate is 15 parts by mass to 30 parts by mass, and the amount of 1,3-propane sultone is 0.01 parts by mass to 0.5 parts by mass. The negative electrode material and the electrolyte can improve the overcurrent and over-temperature safety of the secondary battery.