• 专利标题:   Fabrication of anode material for use in lithium-ion batteries, involves producing silicon slag via carbothermic reduction of silica at elevated temperatures, and submitting the slag to mechanical grinding.
  • 专利号:   WO2022087709-A1, TW202239040-A, WO2022087709-A8, CA3197144-A1
  • 发明人:   ROUE L, VANPEENE V, HEITZ A, SHAHVERDI A, MARDAN M, CARABIN P
  • 专利权人:   HPQSILICON RESOURCES INC, HPQSILICON INC, HPQ SILICON INC
  • 国际专利分类:   H01M010/0525, H01M004/134, H01M004/1395
  • 专利详细信息:   WO2022087709-A1 05 May 2022 H01M-004/1395 202249 Pages: 28 English
  • 申请详细信息:   WO2022087709-A1 WOCA000100 01 Nov 2021
  • 优先权号:   US108257P, CA3197144

▎ 摘  要

NOVELTY - Fabrication of anode material involves producing a silicon slag (3) through a carbothermic reduction of silica at elevated temperature, preferably above 1400 degrees C and submitting the silicon slag to mechanical grinding. USE - Fabrication of anode material for use in lithium-ion batteries for electric vehicles, portable electronic devices and green energy production. ADVANTAGE - The method provides silicon slag with high energy density along with a higher power density. The method is environmentally friendly, greener and higher capacity materials to replace graphite anode in lithium-ion batteries (LiBs). The method reduces the degradation of the anode material and loss of contact between the current collector which leads to loss of capacity upon cycling. The silicon slags can be transformed into a material for use in anodes for LiBs in a cost-effective and eco-friendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for silicon slag, which comprises silicon, carbon and oxygen as the main elemental components and is used as raw material in fabricating anodes used in lithium-ion batteries, and has a composition containing silicon, silicon carbide, carbon and silicon dioxide. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of the fabrication of anode material. Reactor (1) High purity silicon (2) Silicon slag (3) Ball milling (4) Slurry preparation (5) Slurry homogenization by mechanical stirring (6) Slurry homogenization by sonification (7) Electrode fabrication (8) Cell assembly (9)