Separator for non-aqueous batteries, non-aqueous battery using same, and production method for separator for non-aqueous batteries

Abstract

Disclosed is a separator for non-aqueous batteries which not only has a shutdown mechanism, but can also achieve a higher output and has short-circuit resistance. The separator is configured of a laminate which is provided with a low melting point polymer-fibre layer (A), formed of a low melting point polymer having a melting point of 100-200 DEG C, and a heat-resistant polymer-fibre layer (B), formed above the low melting point polymer-fibre layer (A) and formed of a heat infusible polymer or a high melting point polymer, having a melting point of over 200 DEG C. The low melting point polymer-fibre layer (A) includes low melting point polymer fibres having a fibre diameter not greater than 1000nm; the heat-resistant polymer-fibre layer (B) is formed from the heat resistant polymers and includes an amalgam of nanofibres and non-nanofibres.

Description

[0001] Associate application

[0002] This application claims priority from Japanese Patent Application No. 2009-214216 filed on September 16, 2009 in Japan, which is incorporated by reference in its entirety as a part of this application. technical field

[0003] The present invention relates to a battery separator usable as a constituent material of a nonaqueous battery and a nonaqueous battery using the same, and to a method for producing the battery separator. Background technique

[0004] In recent years, non-aqueous batteries such as lithium batteries (lithium primary batteries) and lithium-ion rechargeable batteries have attracted attention as lightweight, high-power, and high-energy power sources in response to the wirelessization of electronic devices. For example, cylindrical lithium rechargeable batteries and the like are used in mobile phones, notebook computers, etc., and thus are mass-produced, and the production volume thereof is increasing year by year. Next...

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