公开(公告)号：US20210184313A1

公开(公告)日：2021-06-17

申请号：US17268479

申请日：2019-08-21

Applicant: ZEON CORPORATION

Inventor： Kazuki ASAI ,  Yasuhiro AKITA ,  Kenya SONOBE

IPC: H01M50/446 ,  H01M50/454 ,  H01M50/423 ,  H01M50/417 ,  H01M10/0525

Abstract: Provided is a slurry composition for a functional layer that can form a functional layer capable of closely adhering strongly to a separator substrate and that can enhance rate characteristics of a secondary battery including a separator that includes the functional layer. The slurry composition for a functional layer contains a binder and a melamine compound. The binder is a polymer including at least one functional group selected from the group consisting of a carboxy group, a hydroxyl group, an amino group, an epoxy group, an oxazoline group, a sulfo group, a nitrile group, and an amide group. The melamine compound has a volume-average particle diameter of not less than 20 nm and not more than 300 nm and constitutes a proportion of not less than 0.5 mass % and not more than 85 mass % among the total of the binder and the melamine compound.

公开(公告)号：US20230082937A1

公开(公告)日：2023-03-16

申请号：US17904374

申请日：2021-02-16

Applicant: ZEON CORPORATION

Inventor： Yasuhiro AKITA ,  Yasuhiro ISSHIKI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/525 ,  H01M4/131 ,  H01G11/38

Abstract: A composite particle for an electrochemical device contains an electrode active material, a conductive material, a binder, and 0.1 parts by mass or more and 5 parts by mass or less of a thermally decomposable foaming agent per 100 parts by mass of the composite particle. When a cross section of the composite particle perpendicular to the long axis of the composite particle, and including the midpoint of the long axis is subjected to a map analysis using an electron beam microanalyzer, the value of the ratio of the integrated values of the detection intensities of carbon atoms contained outside and inside the range of the circle the center of which is coincides with the midpoint of the long axis and the diameter of which is one half of the length of the long axis is 4 or more and 15 or less.