Title:
SEPARATOR FOR SQUARE-SHAPED NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, LAYERED ELECTRODE PRODUCT, AND SQUARE-SHAPED NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/049403
Kind Code:
A1
Abstract:
This separator for a square-shaped non-aqueous electrolyte secondary battery is obtained by layering a porous layer on a microporous polyolefin film. The microporous film satisfies formulae (1) to (3). The porous layer satisfies the formula (4) and contains inorganic particles and a swellable resin containing a vinylidene fluoride copolymer in which the content of hexafluoropropylene is 2.5-6.0 mol%. Formula (1): 8 ≤ t ≤ 20 (t is the thickness (μm) of the microporous polyolefin film)
Formula (2): 0.09 ≤ N ≤ 0.14 (N is the nanoindentation value of the microporous polyolefin film)
Formula (3): C ≤ 4.0 (C is the creep value of the microporous polyolefin film)
Formula (4): 0.55 ≤ Q ≤ 1.10 (Q is the weight per unit area (g/m2 of a resin component in the porous layer)
Inventors:
SHIRAO YOTARO (JP)
MIZUNO NAOKI (JP)
KAJITA ATSUSHI (JP)
MIZUNO NAOKI (JP)
KAJITA ATSUSHI (JP)
Application Number:
PCT/JP2020/033381
Publication Date:
March 18, 2021
Filing Date:
September 03, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
H01M50/409
Domestic Patent References:
| WO2019054422A1 | 2019-03-21 | |||
| WO2019130994A1 | 2019-07-04 |
Foreign References:
| JP2005100951A | 2005-04-14 |
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