PRODUCTION METHOD OF SULFUR-MODIFIED POLYACRYLONITRILE

    公开(公告)号:US20220340693A1

    公开(公告)日:2022-10-27

    申请号:US17763839

    申请日:2020-09-14

    Abstract: The present invention provides a method of producing sulfur-modified polyacrylonitrile, including: a step (1) of heating polyacrylonitrile and elemental sulfur in a rotating-type heating container including a discharge pipe and a sulfur vapor recovery unit while rotating the rotating-type heating container; a step (2) of liquefying a sulfur vapor by the sulfur vapor recovery unit while discharging hydrogen sulfide generated in the heating step; and a step (3) of returning the liquefied sulfur to a mixture of the sulfur and the polyacrylonitrile of the step (1).

    METHOD FOR SUPPRESSING THERMAL RUNAWAY CAUSED BY INTERNAL SHORT CIRCUIT

    公开(公告)号:US20200335789A1

    公开(公告)日:2020-10-22

    申请号:US16960713

    申请日:2019-03-13

    Abstract: Disclosed is a non-aqueous electrolyte secondary battery that is small and lightweight, has a high capacity, and can be produced without causing a size increase and a significant cost increase, wherein, even if an internal short circuit occurs, thermal runaway is unlikely to occur, and there is no risk of ignition or explosion. Also disclosed is is a method for suppressing thermal runaway caused by an internal short circuit, wherein sulfur-modified polyacrylonitrile is contained in a negative electrode material mixture layer in a non-aqueous electrolyte secondary battery that includes: a positive electrode that contains a positive electrode active material; a negative electrode that contains a negative electrode active material; and a non-aqueous electrolyte. The amount of sulfur-modified polyacrylonitrile can be set to 30 mass % or more.

    METHOD FOR PRODUCING ORGANO-SULFUR ELECTRODE ACTIVE MATERIAL

    公开(公告)号:US20200243860A1

    公开(公告)日:2020-07-30

    申请号:US16756580

    申请日:2018-10-30

    Abstract: Disclosed is a sulfur-based electrode active material with which a nonaqueous electrolyte secondary battery that has a large capacity and exhibits less deterioration of the cycle characteristics can be obtained even when an electrode is employed in which the sulfur-based electrode active material is used as an electrode active material and an aluminum foil is used as a current collector. Also disclosed is a method for producing an organosulfur electrode active material, including a step of obtaining an organosulfur compound by heat-treating an organic compound and sulfur and a step of treating the organosulfur compound with a basic compound. The organosulfur compound is preferably sulfur-modified polyacrylonitrile, and the basic compound is preferably ammonia. The organosulfur compound may be treated with the basic compound after the organosulfur compound is ground, or may be ground in a medium that contains the basic compound.

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