Title:
A polyolefin fine porous film and an accumulation-of-electricity device
Document Type and Number:
Japanese Patent JP5942127
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a polyolefin microporous film capable of attaining an electricity storage device capable of satisfying both of life character (evaluated by cycle test) and a high output character (evaluated by high rate character).SOLUTION: This polyolefin microporous film includes an effective diffusion coefficient in the thickness direction D(Z)as shown by formula (1) of ≥4.20×10, and a Bruggeman index shown as α in formula (2) of 2.60≤α≤5.00 and a number of pores obtained by gas liquid method of ≥60 (pieces/μm): D(Z)=D(Z)×ε---(1), and ε=D(Z)/D---(2), wherein D(Z) is the diffusion coefficient in thickness direction of the polyolefin microporous film measured by a magnetic field gradient NMR method, Dis the diffusion coefficient of electrolyte liquid used in the measurement of the magnetic field gradient NMR method, and ε is the porosity of the polyolefin microporous film.
Inventors:
Kazuhiro Omi
Uchida Yuki
Takuya Morikawa
Yamamoto
Uchida Yuki
Takuya Morikawa
Yamamoto
Application Number:
JP2010250272A
Publication Date:
June 29, 2016
Filing Date:
November 08, 2010
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C08J9/26; H01M2/16
Domestic Patent References:
| JP2009149710A | ||||
| JP2009242631A | ||||
| JP2008120930A | ||||
| JP2002105235A | ||||
| JP2003138050A |
Foreign References:
| WO2009123015A1 | ||||
| WO2009038233A1 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito