Nitto-denko Corporation

Kinkou Sho

Shunsuke Noumi

Hiroyoshi Take

Yoshihiro Uetani

Masao Abe

Sadahiro Nakanishi

Keisuke Kii

Kazushige Yamamoto

Hideyuki Emori

The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a first reactive group containing active hydrogen and a second reactive group having cationic polymerizability with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.

Battery separator and battery using the same

The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a reactive group containing active hydrogen with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.

The invention provides a battery separator comprising a porous resin film and a crosslinked polymer supported thereon and having iminodiacetic acid groups in side chains of the polymer chains. The iminodiacetic acid group is preferably represented by the formula wherein Mand Mare each independently a hydrogen atom, a lithium atom, a potassium atom, a sodium atom, or triethylamine. It is preferred that the layer of the crosslinked polymer is substantially nonporous or solid, and ion conductive, and that the crosslinked polymer has in the molecule oxetanyl groups which are capable of cation polymerization.

Battery separator and nonaqueous lithium ion secondary battery having the same

Disclosed is an electrolyte membrane which enables a fuel cell to have a high maximum output when used therein since it has high proton conductivity and high hydrogen gas impermeability. Also disclosed are a method for producing such an electrolyte membrane, and a solid polymer fuel cell using such an electrolyte membrane. A method for producing an electrolyte membrane including a step for impregnating a porous base with a solution containing a sulfonic acid group-containing vinyl monomer and then polymerizing the monomer is characterized in that 80% by mole or more of vinyl sulfonic acid having purity of 90% or more, and/or a salt thereof is contained as the sulfonic acid group-containing vinyl monomer, and the concentration of the vinyl sulfonic acid and/or a salt thereof in the solution is set at 35% by weight or more.

Growing community of inventors

Osaka, Japan

Kinkou Sho