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Title:
LITHIUM ION SECONDARY BATTERY AND ELECTRIC DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/070423
Kind Code:
A1
Abstract:
Provided are: a lithium ion secondary battery in which heat generation is suppressed in the event of an internal short circuit caused by an external shock, such as the penetration of a nail or collapse, or in the event of a short circuit caused by foreign matter contamination; and an electric device using said lithium ion secondary battery. More specifically, the following lithium ion secondary battery and an electric device using the same are provided. A lithium ion secondary battery having a positive electrode having a positive electrode active material layer on a current collector, and a negative electrode having a negative electrode active material layer on a current collector, with a separator disposed therebetween and impregnated with a non-aqueous electrolytic solution, wherein the positive electrode active material layer contains a positive electrode active material and a binder, the negative electrode active material layer contains a negative electrode active material and contains, as a binder, a copolymer of vinyl alcohol and an ethylenically unsaturated carboxylic acid alkali metal neutralized product, and the separator contains an inorganic compound in a polymeric base material or is made of a polymer having a melting point or glass transition temperature of 140°C or higher.

Inventors:
IKEUCHI, Yuta (8-31 Midorigaoka 1-chome, Ikeda-sh, Osaka 77, 〒5638577, JP)
SAKAMOTO, Taichi (8-31 Midorigaoka 1-chome, Ikeda-sh, Osaka 77, 〒5638577, JP)
MUKAI, Takashi (8-31 Midorigaoka 1-chome, Ikeda-sh, Osaka 77, 〒5638577, JP)
YANAGIDA, Masahiro (8-31 Midorigaoka 1-chome, Ikeda-sh, Osaka 77, 〒5638577, JP)
FUJISHIGE, Junichi (346-1, Miyanishi, Harima-cho, Kako-gu, Hyogo 45, 〒6750145, JP)
KINNO, Masako (346-1, Miyanishi, Harima-cho, Kako-gu, Hyogo 45, 〒6750145, JP)
TAKAHASHI, Erina (346-1, Miyanishi, Harima-cho, Kako-gu, Hyogo 45, 〒6750145, JP)
Application Number:
JP2017/036813
Publication Date:
April 19, 2018
Filing Date:
October 11, 2017
Export Citation:
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Assignee:
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (3-1 Kasumigaseki 1-chome, Chiyoda-ku Tokyo, 21, 〒1008921, JP)
SUMITOMO SEIKA CHEMICALS CO., LTD. (346-1, Miyanishi Harima-cho, Kako-gu, Hyogo 45, 〒6750145, JP)
International Classes:
H01M10/052; H01M2/16; H01M4/13; H01M4/62; H01M10/0566; H01M10/0567
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (Kitahama TNK Building, 1-7-1 Doshomachi, Chuo-ku, Osaka-sh, Osaka 45, 〒5410045, JP)
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