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    METHOD FOR PRODUCING SI-BASED ACTIVE MATERIAL
    1.
    发明申请
    METHOD FOR PRODUCING SI-BASED ACTIVE MATERIAL 有权

    公开(公告)号：US20210300768A1

    公开(公告)日：2021-09-30

    申请号：US17201788

    申请日：2021-03-15

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Jun YOSHIDA ,  Kazuhiro SUZUKI ,  Mitsutoshi OTAKI

    IPC: C01B33/021

    Abstract: A method produces a Si-based active material containing a Si-based clathrate compound decreasing a Na element content while maintaining a crystal phase of type II clathrate. The method that produces a Si-based active material containing a Si-based clathrate compound having a crystal phase of type II clathrate, includes: preparing the Si-based clathrate compound by heating an alloy containing a Na element and a Si element at a temperature of 340° C. or more and less than 400° C. (a first heating step), heating the Si-based clathrate compound at a temperature of 340° C. or more and less than 470° C. after the first heating step (a second heating step), cooling the Si-based clathrate compound to a temperature of less than 340° C. after the second heating step (a cooling step), and heating the Si-based clathrate compound at a temperature of 340° C. or more and less than 470° C. after the cooling step (a third heating step).

    ACTIVE MATERIAL
    6.
    发明申请
    ACTIVE MATERIAL 有权

    公开(公告)号：US20210020938A1

    公开(公告)日：2021-01-21

    申请号：US16906208

    申请日：2020-06-19

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Hiroyuki YAMAGUCHI ,  Hironori DAIKOKU ,  Jun YOSHIDA ,  Kazuhiro SUZUKI ,  Mitsutoshi OTAKI

    IPC: H01M4/58 ,  C01B33/06

    Abstract: A main object of the present disclosure is to provide an active material wherein an expansion upon intercalation of a metal ion such as a Li ion is suppressed. The present disclosure achieves the object by providing an active material comprising a silicon clathrate type crystal phase, and the active material includes a Na element, a Si element and a M element that is a metal element with an ion radius larger than the Si element, and a proportion of the M element to a total of the Si element and the M element is 0.1 atm % or more and 5 atm % or less.

    METHOD OF PRODUCING LITHIUM ION SECONDARY BATTERY
    10.
    发明申请
    METHOD OF PRODUCING LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20180205076A1

    公开(公告)日：2018-07-19

    申请号：US15863280

    申请日：2018-01-05

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Kazuhiro SUZUKI

    IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/587 ,  H01M4/133 ,  H01M4/583 ,  H01M4/62

    Abstract: A method of producing a lithium ion secondary battery includes the following (A) to (E). (A) A negative electrode active material powder having a BET specific surface area of 2.2 m2/g or more and 5.2 m2/g or less is prepared. (B) Fluorine is incorporated into the negative electrode active material powder. (C) Wet granules are prepared by mixing the negative electrode active material powder, a water-soluble binder powder, and water. (D) A negative electrode is produced by forming the wet granules into a film form. (E) A lithium ion secondary battery including the negative electrode, a positive electrode, and an electrolytic solution is produced. When the negative electrode active material powder is formed into a pellet having a density of 1.5 g/m3, fluorine is incorporated into the negative electrode active material powder so that the pellet has a water contact angle of 96° or more and 138° or less.

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