Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
NONAQUEOUS ELECTROLYTE BATTERY AND BATTERY PACK
Document Type and Number:
WIPO Patent Application WO/2019/193756
Kind Code:
A1
Abstract:
The present invention provides a nonaqueous electrolyte battery provided with a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a mixture of a spinel-type lithium manganese composite oxide and a lithium cobaltate, and satisfies the relationship 0.01 ≤ B/(A + B) < 0.1 where A is the weight of the lithium manganese composite oxide and B is the weight of the lithium cobaltate. The negative electrode contains a spinel-type lithium titanate. A first P element atomic percent, taken with reference to the C, O, Li, N, F, P, and Mn contained in the positive electrode, declines in the thickness direction from the surface of the positive electrode, and the first P element atomic percent at a first depth in the range from 3 nm to less than 10 nm from the positive electrode surface is not more than 0.5 at%. The ratio of the state ratio of the element N to the element P in the positive electrode is from 0.2 to 0.5. A second P element atomic percent, taken with reference to the C, O, Li, N, F, P, Mn, and Ti contained in the negative electrode, declines in the depth direction from the surface of the negative electrode, and the second P element atomic percent at a second depth in the range from 20 nm to less than 30 nm from the negative electrode surface is not more than 0.5 at%.

Inventors:
HARA, Ryo (72-34 Horikawa-cho, Saiwai-ku, Kawasaki-sh, Kanagawa 13, 〒2120013, JP)
HOSHINA, Keigo (72-34 Horikawa-cho, Saiwai-ku, Kawasaki-sh, Kanagawa 13, 〒2120013, JP)
YAMAMOTO, Dai (72-34 Horikawa-cho, Saiwai-ku, Kawasaki-sh, Kanagawa 13, 〒2120013, JP)
WATANABE, Yuki (72-34 Horikawa-cho, Saiwai-ku, Kawasaki-sh, Kanagawa 13, 〒2120013, JP)
Application Number:
JP2018/014765
Publication Date:
October 10, 2019
Filing Date:
April 06, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KABUSHIKI KAISHA TOSHIBA (1-1 Shibaura 1-chome, Minato-ku Tokyo, 01, 〒1058001, JP)
International Classes:
H01M10/0525; H01M4/131; H01M4/36; H01M4/485; H01M4/505; H01M4/525; H01M10/0568
Domestic Patent References:
WO2015107832A12015-07-23
Foreign References:
JP2016207313A2016-12-08
JP2006066341A2006-03-09
JP2009129797A2009-06-11
JP2016015214A2016-01-28
JP2000173619A2000-06-23
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (11th Floor Celestine Shiba Mitsui Bldg., 3-23-1 Shiba, Minato-k, Tokyo 14, 〒1050014, JP)
Download PDF: