SEPARATOR FOR BATTERIES, AND BATTERY

摘要

[Problem] To provide a separator for batteries which is capable of constituting a battery having improved safety and a battery which is provided with the separator. [Solution] A separator for batteries of the present invention is characterized by being composed of a multilayer porous membrane which comprises at least a resin porous membrane (I) and a heat-resistant porous membrane (II) that contains heat-resistant fine particles as a main component. The separator for batteries is also characterized by having a shutdown temperature of 100-150°C and a shutdown speed of 50 O/min·cm2 or more. A battery of the present invention is characterized by being provided with: a positive electrode which comprises an active material that is capable of absorbing and desorbing Li ions; a negative electrode which comprises an active material that is capable of absorbing and desorbing Li ions; an organic electrolyte solution; and a separator for batteries of the present invention.