Abstract: Techniques relating to an electrolyte having high ion conductivity and high strength are provided. The electrolyte includes an ionic liquid, an inorganic oxide, and a binder, wherein the binder is formed from raw materials that are a polycarbonate polyol and a polyisocyanate, and the binder includes, at an end, at least one functional group selected from the group consisting of a trialkoxysilyl group having 1 to 4 carbon atoms, an epoxy group, and an oxetanyl group.

Abstract: Provided is a technique that provides high durability and high flexibility at low temperatures. A polyurethane resin composition is produced by chain-extending, using polyamine, a reaction product between a polyol including at least one polyether polyol of polytetramethylene ether glycol or polypropylene glycol, 1,10-decanediol, and a polyol including an anionic hydrophilic group, and polyisocyanate.

Abstract: A technology related to a binder that exhibits good ionic conductivity, binding properties, and discharge retention rate is provided. An aqueous polyurethane resin dispersion for binders that are used in lithium secondary batteries is an aqueous polyurethane resin dispersion including a polyurethane resin dispersed in water, the polyurethane resin being obtained by reacting a polyisocyanate compound (a), a compound (b) having two or more active hydrogen groups, a compound (c) having a hydrophilic group and one or more active hydrogen groups, and a chain extender (d) . The compound (b) contains a polyolefin (b1) having two or more active hydrogen groups and a polycarbonate (b2) having two or more active hydrogen groups and having 6 or less consecutive carbon atoms. A crosslink density per molecular weight of 1,000 of a resin solid component contained in the aqueous polyurethane resin dispersion is 0.02 mol/kg or more and 0.28 mol/kg or less.

Abstract: A technology which exhibits a low internal resistance and good output characteristics is provided. An aqueous polyurethane resin dispersion for a secondary battery separator includes an aqueous polyurethane resin dispersion containing a polyurethane resin dispersed in water, the polyurethane resin being obtained by reacting a polyol, a polyisocyanate compound, and a chain extender. The polyol contains a polycarbonate polyol. The polyurethane resin has a crosslink density of 0.02 mol/kg or more and 0.28 mol/kg or less.