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Microporous film for power storage device separator and power storage device separator making use of the same

A technology for power storage devices and microporous membranes, applied in lithium batteries, electrolytic capacitors, non-aqueous electrolyte batteries, etc., can solve problems such as heavy loads on automobiles, and achieve the effects of increased output density, high porosity, and high longitudinal strength

Inactive Publication Date: 2008-10-22
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in recent years, global warming, air pollution, oil depletion, and carbon dioxide emission restrictions have become major issues, and the environmental load of automobiles has also become a major issue.

Method used

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  • Microporous film for power storage device separator and power storage device separator making use of the same
  • Microporous film for power storage device separator and power storage device separator making use of the same
  • Microporous film for power storage device separator and power storage device separator making use of the same

Examples

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Embodiment 1

Embodiment 2

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Abstract

There are provided a microporous film for an electric storage device separator, which can increase energy density and power density when used in an electric storage device, and which is excellent in handling properties in a processing step to the electric storage device, as well as an electric storage device separator and an electric storage device, using the microporous film. Specifically, provided is a microporous film for an electric storage device separator, characterized by including a porosity of 70% or more, a strength of 40 MPa or more in a longitudinal direction, an average pore size of from 40 to 400 nm, anuclear pores, and exhibiting biaxial orientation.

Description

Microporous membrane for electrical storage device separator and electrical storage device separator using the same technical field The present invention relates to a microporous membrane for an electrical storage device separator suitable for various electrical storage devices represented by lithium ion batteries and the like. More specifically, it relates to the energy density and output of an electrical storage device obtained by using the membrane as a separator, which has extremely high porosity and excellent permeability compared with conventional microporous membranes for electrical storage device separators. A microporous film for an electrical storage device separator having an increased density. It also relates to a microporous membrane for an electrical storage device separator having a high balance between high porosity and longitudinal strength, and excellent handleability when the film is processed into a separator for an electrical storage device. It further r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16C08J9/00H01G9/02H01M10/40H01M10/052H01M10/36H01M50/417H01M50/489H01M50/491H01M50/494
CPCH01G9/02Y02T10/7022H01M2/1653H01M10/052Y02T10/7011Y02T10/70Y02E60/10H01M50/417H01M50/491H01M50/489H01M50/494C08J9/00H01M10/05
Inventor 增田顺一大仓正寿田中茂福岛一
Owner TORAY IND INC
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