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    A METHOD FOR PRODUCING A CARBON-SILICON COMPOSITE MATERIAL POWDER, AND A CARBON-SILICON COMPOSITE MATERIAL POWDER
    1.
    发明申请
    A METHOD FOR PRODUCING A CARBON-SILICON COMPOSITE MATERIAL POWDER, AND A CARBON-SILICON COMPOSITE MATERIAL POWDER 审中-公开

    公开(公告)号：WO2022003633A1

    公开(公告)日：2022-01-06

    申请号：PCT/IB2021/055941

    申请日：2021-07-02

    Applicant: STORA ENSO OYJ

    Inventor： OLSSON, Vilhelm ,  WACHTLER, Mario ,  WALTER, Stephan ,  MASSON, David ,  LÖNNEMARK, Lena

    IPC: C01B32/318 ,  H01M4/04 ,  H01M4/133 ,  B01F3/18 ,  B29B7/02 ,  B29C48/03 ,  C08H7/00 ,  H01M4/583 ,  H01M10/058

    Abstract: The present disclosure relates to a method for producing a carbon-silicon composite material powder, comprising: providing a carbon-containing precursor, which is lignin; providing at least one silicon-containing active material; melt-mixing at least said carbon-containing precursor and said silicon-containing active material(s) to a melt-mixture; providing said melt-mixture in a non-fibrous form and cooling the melt- mixture to provide an isotropic intermediate composite material; subjecting said isotropic intermediate composite material to a thermal treatment, wherein said thermal treatment comprises a carbonization step to provide a carbon-silicon composite material, and subjecting said carbon-silicon composite material to pulverization to provide said carbon-silicon composite material powder. The present disclosure also relates to a carbon-silicon composite material powder obtainable by the method, a negative electrode for a non-aqueous secondary battery, such as a lithium-ion battery, comprising the carbon-silicon composite material powder, and use of the carbon-silicon composite material powder in a negative electrode of a non-aqueous secondary battery.

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