To provide a nonaqueous electrolyte battery having improved cycle life, and to provide an active material used in the battery and a production method thereof, as well as a battery pack.
An active material contains a titanium oxide compound having a crystal structure of a monoclinic titanium dioxide and satisfies formula I: S1/(S2+S3)≤1.9 (I). In the formula, S1 is a peak area of a peak existing in a region of 1430 cm-1 to 1460 cm-1 in an infrared diffuse reflectance spectrum of the active material after adsorbing and desorbing pyridine, S2 is the peak area of a peak existing in a region of 1470 cm-1 to 1500 cm-1 in the infrared diffuse reflectance spectrum, and S3 is the peak area of a peak existing in a region of 1520 cm-1 to 1560 cm-1 in the infrared diffuse reflectance spectrum.
CHANG MUN
OTANI YUKI
HARADA YASUHIRO
INAGAKI HIROTAKA
TAKAMI NORIO
| JP2010055855A | 2010-03-11 | |||
| JP2007149648A | 2007-06-14 | |||
| JP2010055855A | 2010-03-11 | |||
| JP2007149648A | 2007-06-14 |
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
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