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    A method for producing a carbon-silicon composite material powder, and a carbon-silicon composite material powder
    1.
    发明专利
    A method for producing a carbon-silicon composite material powder, and a carbon-silicon composite material powder 未知

    公开(公告)号：SE2050837A1

    公开(公告)日：2022-01-04

    申请号：SE2050837

    申请日：2020-07-03

    Applicant: STORA ENSO OYJ

    Inventor： MASSON DAVID ,  LÖNNEMARK LENA ,  WACHTLER MARIO ,  WALTER STEPHAN ,  OLSSON VILHELM

    IPC: C01B32/318 ,  B01F23/60 ,  B29C48/03 ,  C08H7/00 ,  H01M4/04 ,  H01M4/133 ,  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 meltmixture 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.

    METHOD FOR PRODUCING CARBON FROM LIGNIN
    2.
    发明专利
    METHOD FOR PRODUCING CARBON FROM LIGNIN 未知

    公开(公告)号：SE546875C2

    公开(公告)日：2025-03-04

    申请号：SE2250425

    申请日：2022-04-04

    Applicant: STORA ENSO OYJ

    Inventor： STOCKWELL ULRIKA ,  OLSSON VILHELM

    IPC: C07G1/00 ,  B29B9/08 ,  B29B13/02 ,  B29B13/06 ,  C01B32/318 ,  H01M4/133 ,  H01M4/583

    Abstract: The present invention relates to a method for producing carbon comprising the steps of: providing lignin having a total metal content of less than 200 ppm to heat treatment at one or more temperatures in the range of from 300 °C and 1500°C to obtain carbon. The present indention also relates to carbon having a total metal content below 800 ppm; a negative electrode for a secondary battery comprising said carbon as active material; and use of said carbon as active material in a negative electrode of a secondary battery.

    A METHOD FOR PRODUCING A CARBON ENRICHED MATERIAL FROM LIGNIN
    4.
    发明专利
    A METHOD FOR PRODUCING A CARBON ENRICHED MATERIAL FROM LIGNIN 未知

    公开(公告)号：SE546694C2

    公开(公告)日：2025-02-11

    申请号：SE2330272

    申请日：2023-06-09

    Applicant: STORA ENSO OYJ

    Inventor： LINDSTRÖM MATS ,  WALTER STEPHAN ,  OLSSON VILHELM

    IPC: C01B32/05 ,  C01B32/312 ,  C07G1/00 ,  C08H7/00 ,  H01M4/133 ,  H01M4/583

    Abstract: The present invention relates to a method for producing a carbon enriched material, said method comprising the steps of: a) providing lignin; b) mixing the lignin with a recirculated carbon enriched material fraction to obtain a lignin-carbon mixture; c) forming an agglomerated lignin-carbon composite material comprising lignin, the recirculated carbon enriched material fraction and optionally at least one additive; d) subjecting the agglomerated lignin-carbon composite material to heat treatment at one or more temperatures in the range of from 300 to 1500°C, wherein the heat treatment is carried out for a total time in the range of from 30 minutes to 10 hours, so as to obtain a carbon enriched material; e) milling the obtained carbon enriched material to so as to reduce the average particle size of the carbon enriched material, and to obtain at least a first fraction of a carbon enriched material, and a second fraction of a carbon enriched material; and f) recirculating at least a part of the first fraction obtained in step e) to step b).

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