Title:
SEPARATOR FOR NONAQUEOUS ELECTROLYTE BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2012/057037
Kind Code:
A1
Abstract:
Disclosed is a separator for nonaqueous electrolyte batteries, which is provided with: a polyolefin microporous base that contains 10-25% by mass (inclusive) of polyolefins having a molecular weight of 100,000 or less relative to the total mass of the polyolefins; and a heat-resistant porous layer that is formed on one or both surfaces of the polyolefin microporous base and contains a heat-resistant polymer. The separator for nonaqueous electrolyte batteries has a maximum value of S that is represented by formula (1) of 0.8 or more, and the temperature showing the maximum value is 130-155˚C (inclusive).
Formula (1): S = d(logR)/dT
[In the formula, R represents the resistance (ohm·cm2) of a cell as determined using a battery that contains the cell, which is provided with a separator for nonaqueous electrolyte batteries, at a heating rate of 1.6˚C/min; and T represents a temperature (˚C).]
Inventors:
YOSHITOMI TAKASHI (JP)
Application Number:
PCT/JP2011/074337
Publication Date:
May 03, 2012
Filing Date:
October 21, 2011
Export Citation:
Assignee:
TEIJIN LTD (JP)
YOSHITOMI TAKASHI (JP)
YOSHITOMI TAKASHI (JP)
International Classes:
H01M50/417; H01M50/423; H01M50/449; H01M50/457; H01M50/489; H01M50/491; H01M50/403; H01M50/406; H01M50/431; H01M50/451
Domestic Patent References:
| WO2008156033A1 | 2008-12-24 | |||
| WO2008062727A1 | 2008-05-29 |
Foreign References:
| JP2006307163A | 2006-11-09 | |||
| JP2006307193A | 2006-11-09 | |||
| JP2005209570A | 2005-08-04 |
Attorney, Agent or Firm:
NAKAJIMA, Jun et al. (JP)
Nakajima 淳 (JP)
Nakajima 淳 (JP)
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Claims: