7results about How to "Improve electrolyte resistance" patented technology

The invention discloses a method for synthesizing ziram. The method comprises the following steps: S1, stirring a compound surfactant and zinc oxide to obtain a dispersion liquid; s2, sealing and pressurizing, and adding dimethylamine for reaction to obtain a dimethylamine salt mixture; and S3, dropwise adding carbon disulfide, performing condensation reaction, and removing impurities to obtain the ziram, wherein the compound surfactant contains at least one of a nonionic surfactant, an anionic surfactant or a macromolecular surfactant. According to the method, the efficient and green synthesis of the ziram is realized through the synergistic effect of a compound surfactant system, a sealed pressurized reaction and a progressive charging sequence.

This invention relates to the field of insulating materials for porous copper foil preparation, and particularly to an insulating material for porous copper foil preparation and its preparation method, as well as a method for preparing porous copper foil. The preparation method includes the following steps: perforating a cathode plate to obtain a cathode plate with multiple blind holes; filling the blind holes with an insulating material for porous copper foil preparation, and curing it to obtain a pretreated cathode plate; the raw materials for the insulating material are: resin, reactive diluent, thixotropic agent, leveling agent, polymerization inhibitor, and photoinitiator. The pretreated cathode plate is used as the cathode and placed in an electrolyte for electrodeposition to obtain porous copper foil. When preparing porous copper foil with the insulating material, the filling material in the blind holes can withstand more than 80 electroplating cycles without peeling off, indicating that the insulating material for porous copper foil preparation possesses excellent adhesion and electrolyte environment durability, enabling a single-filled cathode to support stable electrodeposition over an ultra-long period, significantly extending its effective service life.

This application discloses a separator and a battery cell, relating to the field of secondary battery technology. The separator disclosed in this application includes a base layer and a coating layer located on at least one side of the base layer. The coating layer is made of a polymer, which includes primary particles and secondary particles. Before the separator comes into contact with the electrolyte, the average particle size of the primary polymer particles is A μm, and the average particle size of the secondary polymer particles is B μm. After the separator is wetted with the electrolyte, the average particle size of the primary polymer particles is C μm, and the average particle size of the secondary polymer particles is D μm. Furthermore, A, B, C, and D satisfy the following condition: 5% < (D-B) / B < (C-A) / A < 50%. The separator described in this application exhibits good electrolyte resistance and good adhesion to the electrodes.

This invention provides a polyacrylate binder for lithium-ion battery separator coating and its preparation method, relating to the field of lithium-ion battery materials technology. The binder comprises emulsion particles with a core-shell structure, prepared by soap-free emulsion polymerization. The soap-free emulsion includes functional monomers, hard monomers, soft monomers, rigid monomers, and post-crosslinking monomers. The core-shell structure includes a core layer, an intermediate layer, and an outer layer. The core layer is copolymerized from hard monomers and functional monomers; the intermediate layer is copolymerized from functional monomers, soft monomers, and rigid monomers; and the outer layer is copolymerized from hard monomers, soft monomers, and functional monomers. This invention, through its three-layer core-shell structure design, achieves a unified approach to separator base film adhesion, prevents re-adhesion during high-temperature transportation, ensures good adhesion to positive and negative electrode sheets under room temperature cold pressing, and provides excellent electrolyte resistance, thus solving the technical problems commonly found in existing PMMA coating processes.

The invention relates to a modified styrene block copolymer and a preparation method and application thereof, the modified styrene block copolymer is an epoxy functional group modified semi-hydrogenated styrene block copolymer, the hydrogenation degree of the semi-hydrogenated styrene block copolymer is 60-90%, the content of the epoxy functional group of the semi-hydrogenated styrene block copolymer is 5-15 mol%, and the content of the epoxy functional group of the semi-hydrogenated styrene block copolymer is 5-15 mol%. Based on the molar content of the conjugated diene block. According to the invention, the epoxidized modified styrene-conjugated diene block copolymer (ESBC) is adopted to replace the traditional SBC rubber, and the stability and aging resistance of the material are improved by the partial hydrogenated structure of the ESBC; a certain content of epoxy functional groups strengthen the compatibility and the adhesive property of the ESBC and a polar material. The hot melt adhesive prepared from ESBC has excellent bonding strength, thermal stability and electrolyte resistance, and has great application value in the field of lithium battery bonding.

According to the rigid polyimide resin for the anode electrophoretic paint and the anode electrophoretic paint provided by the invention, the polyimide resin is rigid water-soluble high-molecular-weight resin, has good insulating property, high temperature resistance and electrolyte resistance, and can be used for protecting a shell film of a power battery when being used for protecting the shell film of the power battery. And the interior and / or the exterior of the power battery can have relatively good insulation, temperature resistance and electrolyte resistance protection.

This application relates to the technical field of rubber sealing materials, and discloses an insulating and electrolyte-resistant rubber sealing material, its preparation method, and its application. The raw material components of the insulating and electrolyte-resistant rubber sealing material of this application include: peroxyfluororubber raw rubber, insulating carbon black, modified nano-calcium carbonate, acid absorbent, lubricant, peroxide vulcanizing agent, and additives; wherein the nitrogen adsorption specific surface area of ​​the insulating carbon black is 20~60 m². 2 / g; Modified nano-calcium carbonate is obtained by surface modification treatment of nano-calcium carbonate with a particle size of 20~80nm using an aminosilane coupling agent. The preparation method of this application, through mixing, open milling and sheeting, and vulcanization, produces an insulating and electrolyte-resistant rubber sealing material with excellent insulation, resilience, mechanical strength, high temperature resistance, and electrolyte resistance, with a volume resistivity reaching up to 1.9×10⁻⁶. 15 Ω·cm, tensile strength retention rate after heat aging at 150℃ for 72h ≥92.4%.