To provide a lithium secondary battery in which charging and discharging cycle characteristics can be promoted more.
The lithium secondary battery 10 is equipped with a positive electrode sheet 13 in which a positive electrode active material 12 is formed in a current collector 11, a negative electrode sheet 18 in which a negative electrode active material 17 is formed on the surface of a current collector 14, and a non-aqueous electrolytic liquid 20 filled between the positive electrode sheet 13 and the negative electrode sheet 18. In this lithium secondary battery, iron phosphate lithium compound is contained in the positive active material 12, while 50 wt.% or more of amorphous carbon (for example, easily graphitized carbon) and 50 wt.% or less of graphite are contained in the negative electrode active material 17. Moreover, a composite material layer containing the negative electrode active material 17, a conductive material, and a binding material is formed with porosity of 25 vol% or more and 50 vol% or less.
OGIWARA NOBUHIRO
SASAKI GEN
HIRUTA OSAMU
MIZUTANI MAMORU
NAKANO HIROYUKI
ITO YUICHI
| JP2006114280A | 2006-04-27 | |||
| JP2006294272A | 2006-10-26 | |||
| JP2007035354A | 2007-02-08 | |||
| JP2007207535A | 2007-08-16 | |||
| JP2006344478A | 2006-12-21 | |||
| JP2005032593A | 2005-02-03 | |||
| JP2008277231A | 2008-11-13 | |||
| JP2006114280A | 2006-04-27 | |||
| JP2007207535A | 2007-08-16 | |||
| JP2005032593A | 2005-02-03 | |||
| JP2008277231A | 2008-11-13 |
| EP1978587A1 | 2008-10-08 |