3results about How to "Avoid joining" patented technology

This invention relates to a silicon-carbon anode material for use in sulfide solid-state batteries, a modification method thereof, and a sulfide solid-state battery and its preparation method. The modification method includes: providing a porous silicon-carbon material, dispersing it in pure water or anhydrous ethanol to obtain solution A; adding a metal source to pure water, and adding oxalic acid or an alkaline solution dropwise while stirring until homogeneous to obtain solution B; transferring solution A to a water bath for stirring, and slowly adding solution B dropwise until the water evaporates, uniformly coating the surface of the silicon-carbon material with the precursor material to obtain the coated material; drying the coated material, and then heating and holding it under a nitrogen atmosphere to convert the surface metal oxide precursor into metal oxide, thus obtaining the silicon-carbon anode material. This invention avoids the addition of a solid electrolyte by constructing a lithium-ion transport layer in situ on the porous silicon-carbon material, thereby improving the initial discharge capacity and cycle stability of the battery, and achieving high capacity retention.

The present application relates to the technical fields of epoxy resin synthesis, in particular to a phenolic epoxy resin, a preparation method and application thereof. The phenolic epoxy resin has the structure shown in the following formula I: Formula I; wherein, in the formula I, n represents a polymerization degree, and is 0.2-0.6; R1, R2 and R3 are each independently selected from H or C1-C 10 alkyl; and R4 is selected from H or a fused ring group. The preparation method of the phenolic epoxy resin adds a phenolic compound for molecular modification in a refining stage, increases the proportion of secondary hydroxyl groups in the epoxy resin, promotes the curing of the epoxy resin, effectively shortens the gel time of the epoxy resin, does not change the mechanical properties of the cured epoxy resin, avoids adding a small molecule accelerator in the epoxy resin compound, and therefore can effectively improve the electrical properties of the cured product.

The application belongs to the field of resin synthesis, and particularly relates to a synthesis method of polyvinyl butyral resin. The raw materials for preparing the PVB resin in the application include PVA, n-butyl aldehyde and glyoxal, and do not include emulsifiers and alkali metal inorganic salts. The PVB resin prepared by improving the feeding mode has excellent penetration resistance, the PVB film prepared from the PVB resin has low haze and high molecular weight, and is particularly suitable for application on automobile glass.