非水电解质蓄电装置用隔膜、非水电解质蓄电装置和它们的制造方法

Separator for nonaqueous electrolyte electricity storage devices, nonaqueous electrolyte electricity storage device, method for producing separator for nonaqueous electrolyte electricity storage devices, and method for manufacturing nonaqueous electr

Abstract

The present invention provides a method for producing a separator for nonaqueous electrolyte electricity storage devices, which is capable of: avoiding the usage of a solvent that places large burden on the environment; relatively easily controlling parameters such as void fraction and pore diameter; and providing a separator for nonaqueous electrolyte electricity storage devices, said separator having high electrochemical stability. The present invention relates to a method for producing the separator for nonaqueous electrolyte electricity storage devices, said separator having a thickness within the range of 5-50 [mu]m. The method comprises: a step of preparing an epoxy resin composition which contains an epoxy resin that has no aromatic ring in each molecular structure, a curing agent and porogen; a step of obtaining an epoxy resin sheet by molding a cured body of the epoxy resin composition into a sheet form or by curing a sheet-like molded body of the epoxy resin composition; and a step of removing the porogen from the epoxy resin sheet with use of a halogen-free solvent.
本发明提供一种非水电解质蓄电装置用隔膜的制造方法,所述制造方法可以避免使用对环境的负荷大的溶剂,并且也可以比较容易地控制孔隙率和孔径等参数,并且所得到的非水电解质蓄电装置用隔膜的电化学稳定性高。本发明涉及制造具有5~50μm的范围的厚度的非水电解质蓄电装置用隔膜的方法。本发明的方法包括:制备含有分子结构中不具有芳香族环的环氧树脂、固化剂和致孔剂的环氧树脂组合物的步骤;将环氧树脂组合物的固化体成形为片状或者使环氧树脂组合物的片状成形体固化以得到环氧树脂片的步骤;和使用无卤溶剂从环氧树脂片中除去致孔剂的步骤。

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