Title:
二次電池
Document Type and Number:
Japanese Patent JP5854285
Kind Code:
B2
Abstract:
A secondary battery 100 includes a positive electrode current collector 221 and a positive electrode mixture layer 223 coated on the positive electrode current collector 221. The positive electrode mixture layer 223 includes a positive electrode active material 610 and an electrically conductive material 620. A ratio (Vb/Va) of a volume Vb of holes formed inside the positive electrode mixture layer 223 to an apparent volume Va of the positive electrode mixture layer 223 satisfies 0.30 ¤ (Vb/Va). In addition, in a micropore distribution of differential micropore volume with respect to a micropore diameter as measured by the mercury intrusion method, the positive electrode mixture layer 223 has a first peak at which a micropore diameter D1 satisfies D1 ¤ 0.25 µm and a second peak at which a micropore diameter D2 is greater than the first peak micropore diameter D1.
Inventors:
Hiroki Nagai
Masahiro Morita
Takashi Iwao
Masahiro Morita
Takashi Iwao
Application Number:
JP2012542782A
Publication Date:
February 09, 2016
Filing Date:
November 12, 2010
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M4/131; H01M4/1391; H01M4/62; H01M10/052
Domestic Patent References:
| JP2010015904A | 2010-01-21 | |||
| JP2004002141A | 2004-01-08 | |||
| JP2009158167A | 2009-07-16 | |||
| JP2002260633A | 2002-09-13 | |||
| JP2002124260A | 2002-04-26 | |||
| JP2010097813A | 2010-04-30 | |||
| JP2005285606A | 2005-10-13 | |||
| JP2001110424A | 2001-04-20 |
Attorney, Agent or Firm:
Makoto Abe