公开(公告)号：US20250046816A1

公开(公告)日：2025-02-06

申请号：US18717640

申请日：2022-12-07

Applicant: Stora Enso OYJ

Inventor： Vilhelm Olsson ,  Stephan Walter ,  Mario Wachtler

IPC: H01M4/587 ,  C04B35/524 ,  C04B35/626 ,  C04B35/636 ,  C04B35/64

Abstract: The present invention is directed to a method for producing an agglomerated lignin-silicon composite material. The method involves the steps of mixing lignin in powder form, at least one silicon-containing active material in powder form and optionally at least one additive; compacting the mixture; and crushing the compacted composite material to obtain an agglomerated lignin-silicon composite material. The invention is also directed to a granular carbon-silicon composite material obtained by heat treatment of the agglomerated lignin-silicon composite material.

公开(公告)号：US20230261174A1

公开(公告)日：2023-08-17

申请号：US18003939

申请日：2021-07-02

Applicant: Stora Enso OYJ

Inventor： Vilhelm Olsson ,  Mario Wachtler ,  Stephan Walter ,  David Masson ,  Lena Lönnemark

IPC: H01M4/36 ,  H01M4/583 ,  H01M4/38 ,  H01M4/04 ,  H01M4/62

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/0471 ,  H01M4/583 ,  H01M4/625 ,  H01M2004/021

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.

公开(公告)号：US20250062318A1

公开(公告)日：2025-02-20

申请号：US18717639

申请日：2022-12-07

Applicant: Stora Enso OYJ

Inventor： Vilhelm Olsson ,  Stephan Walter ,  Mario Wachtler ,  Mats Lindström

IPC: H01M4/36 ,  H01M4/587

Abstract: The present invention is directed to a method for producing a thermally stabilized agglomerated lignin-carbon composite material. The method involves the steps of providing an agglomerated lignin-carbon composite material comprising lignin and at least one carbon additive; and heating the agglomerated lignin-carbon composite material to obtain the thermally stabilized agglomerated lignin-carbon composite material. The invention is also directed to a granular carbon-carbon composite material obtained by heat treatment of the thermally stabilized agglomerated lignin-carbon composite material.