公开(公告)号：EP3691005A1

公开(公告)日：2020-08-05

申请号：EP18861640.3

申请日：2018-09-26

申请人： Sumitomo Seika Chemicals Co., Ltd.

发明人： HASHIMOTO, Shun ,  HIRABAYASHI, Naoka ,  KINNO, Masako

IPC分类号： H01M4/62 ,  C08L29/04 ,  C08L33/00 ,  C08L33/02 ,  H01M4/13

摘要： There is provided an electrode binder that has sufficient binding force and can reduce the resistance of a nonaqueous electrolyte secondary battery. The binder for a nonaqueous electrolyte secondary battery electrode comprises a copolymer of a vinyl alcohol and an alkali metal-neutralized product of ethylenically unsaturated carboxylic acid; and at least one of poly(meth)acrylic acid and an alkali metal-neutralized product of poly(meth)acrylic acid.

公开(公告)号：EP3528329A1

公开(公告)日：2019-08-21

申请号：EP17860387.4

申请日：2017-10-11

申请人： National Institute of Advanced Industrial Science and Technology ,  Sumitomo Seika Chemicals Co., Ltd.

发明人： IKEUCHI, Yuta ,  SAKAMOTO, Taichi ,  MUKAI, Takashi ,  YANAGIDA, Masahiro ,  FUJISHIGE, Junichi ,  KINNO, Masako ,  TAKAHASHI, Erina

IPC分类号： H01M10/052 ,  H01M2/16 ,  H01M4/13 ,  H01M4/62 ,  H01M10/0566 ,  H01M10/0567

摘要： Provided are a lithium ion secondary battery in which heat generation is suppressed when the battery is internally short-circuited by an external impact, such as nail penetration or collapse, or short-circuited by foreign matter contamination or the like; and an electrical appliance using the battery. More specifically, the following lithium ion secondary battery and electrical appliance comprising the lithium ion secondary battery are provided. A lithium ion secondary battery comprising a positive electrode having a positive electrode active material layer on a current collector, a negative electrode having a negative electrode active material layer on a current collector, and a separator disposed between the positive electrode and the negative electrode and impregnated with a non-aqueous electrolyte solution, the positive electrode active material layer comprising a positive electrode active material and a binder, the negative electrode active material layer comprising a negative electrode active material and a binder, the binder of the negative electrode active material layer comprising a copolymer of vinyl alcohol and an alkali metal neutralized product of ethylenically unsaturated carboxylic acid, and the separator comprising a polymeric base material containing an inorganic compound or comprising a polymer having a melting point or glass transition temperature of 140°C or higher.